WO2012063731A1 - Steam generator, method for assembling steam generator, and moving devices of steam-water separator - Google Patents

Steam generator, method for assembling steam generator, and moving devices of steam-water separator Download PDF

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Publication number
WO2012063731A1
WO2012063731A1 PCT/JP2011/075413 JP2011075413W WO2012063731A1 WO 2012063731 A1 WO2012063731 A1 WO 2012063731A1 JP 2011075413 W JP2011075413 W JP 2011075413W WO 2012063731 A1 WO2012063731 A1 WO 2012063731A1
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WO
WIPO (PCT)
Prior art keywords
steam
separator
water
water separator
moving
Prior art date
Application number
PCT/JP2011/075413
Other languages
French (fr)
Japanese (ja)
Inventor
正人 山崎
Original Assignee
三菱重工業株式会社
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Filing date
Publication date
Application filed by 三菱重工業株式会社 filed Critical 三菱重工業株式会社
Publication of WO2012063731A1 publication Critical patent/WO2012063731A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/023—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers with heating tubes, for nuclear reactors as far as they are not classified, according to a specified heating fluid, in another group
    • F22B1/025—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers with heating tubes, for nuclear reactors as far as they are not classified, according to a specified heating fluid, in another group with vertical U shaped tubes carried on a horizontal tube sheet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/24—Supporting, suspending, or setting arrangements, e.g. heat shielding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/26—Steam-separating arrangements
    • F22B37/32—Steam-separating arrangements using centrifugal force
    • F22B37/327—Steam-separating arrangements using centrifugal force specially adapted for steam generators of nuclear power plants
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21D—NUCLEAR POWER PLANT
    • G21D1/00—Details of nuclear power plant
    • G21D1/006—Details of nuclear power plant primary side of steam generators

Definitions

  • the present invention relates to a steam generator used as a heat exchanger in a nuclear power plant, a method for assembling the steam generator, and a moving device for the steam separator.
  • a pressurized water reactor For example, in a pressurized water reactor (PWR), light water is used as a reactor coolant and neutron moderator, and high temperature and high pressure water that does not boil throughout the core is sent to a steam generator. Steam is generated by heat exchange, and the steam is sent to a turbine generator for power generation.
  • the heat of the high-temperature and high-pressure primary cooling water is transmitted to the secondary cooling water by the steam generator, and steam is generated by the secondary cooling water.
  • primary cooling water flows inside a large number of thin heat transfer tubes, heat is transferred to secondary cooling water flowing outside, and steam is generated, and a turbine is rotated by the steam to generate electric power.
  • a tube group outer cylinder is disposed at a predetermined distance from the inner wall surface in a hollow hermetically sealed body portion, and a plurality of inverted U-shaped heat transfer tubes are arranged in the tube group outer cylinder.
  • An end portion of each heat transfer tube is supported by the tube plate, and an inlet side water chamber mirror and an outlet side water chamber mirror of the primary cooling water are formed at the lower end portion of the trunk portion.
  • an inlet portion of the secondary cooling water is provided in the trunk portion above the outer tube of the tube group, and a steam / water separator and a moisture separator are arranged side by side, above which steam is placed. There is an exit.
  • the primary cooling water is supplied from the cooling water pipe to the plurality of heat transfer tubes through the inlet side water chamber mirror, while the secondary cooling water is supplied from the inlet portion into the trunk portion. Then, heat exchange is performed between the primary cooling water (hot water) flowing in the plurality of heat transfer tubes and the secondary cooling water (cold water) circulating in the body, so that the secondary cooling water absorbs heat. Water vapor is generated. Then, moisture is removed from the generated steam by the steam separator, and the steam from which moisture has been removed by the moisture separator is discharged from the steam outlet, while the primary cooling water that has finished heat exchange is discharged from the outlet side water. It is discharged from the mirror.
  • the body When assembling the conventional steam generator described above, the body is divided into an upper body and a lower body, and an air / water separator, a moisture separator, etc. are accommodated in the upper body, while outside the tube group in the lower body.
  • a cylinder, a plurality of heat transfer tubes, and the like are accommodated, and in this state, the upper body and the lower body are laid sideways and joined together by welding.
  • An object of the present invention is to solve the above-described problems, and to provide a steam generator, a method for assembling the steam generator, and a moving device for the steam / water separator that can improve the workability of the assembly work. To do.
  • a steam generator has a hollow hermetically sealed body part in which an upper body and a lower body are joined, and a reverse U-shape is formed in the body part.
  • a heat transfer tube group composed of a plurality of heat transfer tubes through which primary cooling water flows, a tube plate fixed to a lower portion in the body portion and supporting ends of the plurality of heat transfer tubes, and a lower end portion of the body portion
  • An inlet-side water chamber mirror and an outlet-side water chamber mirror that are provided and communicated with each end of the plurality of heat transfer tubes, a water supply unit that supplies secondary cooling water into the body, and the heat transfer tubes in the body
  • the steam separator is provided with a mounting portion for the assembly moving device. It is intended.
  • the assembly moving device when assembling the steam generator, can be easily attached to the steam / water separator via the mounting portion, and the steam / water separator is arranged on the side close to the moisture separator in advance. Therefore, it is possible to secure a working space for joining the upper body and the lower body inside, and then fix the gas / water separator appropriately by moving it to a predetermined position by the moving device for assembly. Therefore, the workability in the assembly operation of the steam generator can be improved.
  • the steam / water separator includes an intermediate deck plate fixed to the inner wall surface of the trunk portion, and a lower portion fixed to the inner wall surface of the trunk portion and positioned below the intermediate deck plate.
  • a deck plate, a riser installed between the intermediate deck plate and the lower deck plate, and a vane provided in the riser, and the mounting portion is provided on the intermediate deck plate and the lower deck plate. It is characterized by being able to.
  • the assembly moving device can be mounted on the intermediate deck plate and the lower deck plate via the mounting portions, respectively, and the air / water separator can be stably moved by the assembly moving device.
  • the steam generator assembly method of the present invention is a method in which a steam / water separator approaches a moisture separator inside a lower trunk that is accommodated in a tube casing and a heat transfer tube group.
  • a steam-water separator moving step of moving to a position where it is separated from the moisture separator and closely contacts the upper end of the tube group outer cylinder, and the steam / water separator is joined to the upper end of the tube group outer cylinder by welding.
  • the steam separator in advance at a position close to the moisture separator, it is possible to secure a working space for joining the upper shell and the lower shell by welding inside, and then The separator can be moved and joined to a position in close contact with the upper end of the tube group outer cylinder, and the workability in the assembly operation of the steam generator can be improved.
  • the steam-water separator moving step includes a mounting step of mounting the steam-water separator on a moving device, and adjustment of a circumferential position of the steam-water separator by the moving device. And a moving step of moving the steam / water separator to the upper end side of the tube group outer cylinder after changing the direction of the moving device.
  • the circumferential position of the steam / water separator can be adjusted by the moving device. Accurate mounting can be made possible.
  • the moving device of the steam / water separator comprises a lower shell in which a tube group outer cylinder and a heat transfer tube group are housed, and an upper shell in which a moisture separator and a steam / water separator are housed.
  • a moving device capable of moving the steam / water separator when joined in a lying state, wherein the steam / water separator is detachable before and after the steam / water separator, and the steam / water separator can be moved up and down via the rack.
  • the moving device adjusts the circumferential position of the steam / water separator before the moving device moves the steam / water separator to the upper end side of the tube group outer cylinder. It is possible to mount the steam / water separator with high accuracy.
  • the steam generator assembly method, and the steam / water separator moving device of the present invention when the upper shell and the lower shell are joined, the steam / water separator in the upper shell is a moisture separator. Since the working space is secured between the steam-water separator and the tube group outer cylinder in advance, the workability in the assembly operation of the steam generator can be improved.
  • FIG. 1 is a schematic view showing a method of assembling a steam generator according to an embodiment of the present invention.
  • 2 is a cross-sectional view taken along the line II-II in FIG. 1 showing an intermediate deck plate of the steam separator in the steam generator of this embodiment.
  • FIG. 3 is a front view of the moving device for the intermediate deck plate.
  • FIG. 4 is a side view of the moving device for the intermediate deck plate.
  • FIG. 5 is a plan view of the moving device for the intermediate deck plate.
  • FIG. 6 is a cross-sectional view taken along the line III-III in FIG. 1 showing the lower deck plate of the steam separator in the steam generator of this embodiment.
  • FIG. 7 is a front view of the moving device for the lower deck plate.
  • FIG. 1 is a schematic view showing a method of assembling a steam generator according to an embodiment of the present invention.
  • FIG. 3 is a front view of the moving device for the intermediate deck plate.
  • FIG. 4 is a side view of the moving
  • FIG. 8 is a side view of the moving device for the lower deck plate.
  • FIG. 9 is a plan view of a moving device for the lower deck plate.
  • FIG. 10 is a schematic diagram illustrating a method of moving the steam separator by the moving device.
  • FIG. 11 is a schematic diagram illustrating a method of moving the steam separator by the moving device.
  • FIG. 12 is an enlarged cross-sectional view of a main part illustrating a joining method of the steam / water separator.
  • FIG. 13 is an operation explanatory view showing the method of assembling the steam generator of this embodiment.
  • FIG. 14 is a flowchart showing the procedure of the method for assembling the steam generator of this embodiment.
  • FIG. 15 is a schematic configuration diagram of a nuclear power plant to which the steam generator of the present embodiment is applied.
  • FIG. 16 is a schematic configuration diagram illustrating a steam generator according to the present embodiment.
  • FIG. 1 is a schematic view showing a method of assembling a steam generator according to one embodiment of the present invention
  • FIG. 2 is a sectional view of an intermediate deck plate of a steam / water separator in the steam generator of this embodiment. II sectional view
  • FIG. 3 is a front view of the moving device for the intermediate deck plate
  • FIG. 4 is a side view of the moving device for the intermediate deck plate
  • FIG. 5 is a plan view of the moving device for the intermediate deck plate.
  • 6 is a cross-sectional view taken along the line III-III of FIG. 1 showing the lower deck plate of the steam separator in the steam generator of the present embodiment
  • FIG. 7 is a front view of the moving device for the lower deck plate
  • FIG. 9 is a plan view of the moving device for the lower deck plate
  • FIG. 10 is a schematic diagram showing a method of moving the steam / water separator by the moving device
  • FIG. 11 is the moving device.
  • FIG. 12 is a schematic diagram showing a method of moving the steam separator according to FIG. 13 is an enlarged cross-sectional view of the main part showing the joining method of the separator
  • FIG. 13 is an operation explanatory view showing the assembling method of the steam generator of this embodiment
  • FIG. 14 shows the procedure of the assembling method of the steam generator of this embodiment.
  • FIG. 15 is a schematic configuration diagram of a nuclear power plant to which the steam generator of the present embodiment is applied
  • FIG. 16 is a schematic configuration diagram illustrating the steam generator of the present embodiment.
  • the nuclear reactor of this embodiment uses light water as a reactor coolant and neutron moderator, and generates high-temperature and high-pressure water that does not boil over the entire core and sends this high-temperature and high-pressure water to a steam generator to generate steam by heat exchange.
  • This is a pressurized water reactor (PWR) that sends this steam to a turbine generator to generate electricity.
  • PWR pressurized water reactor
  • a pressurized water reactor 12 and a steam generator 13 are stored in a reactor containment vessel 11, and this pressurized water type is stored.
  • the reactor 12 and the steam generator 13 are connected via cooling water pipes 14 and 15, a pressurizer 16 is provided in the cooling water pipe 14, and a cooling water pump 15 a is provided in the cooling water pipe 15. .
  • light water is used as the moderator and primary cooling water (cooling material), and the primary cooling system is maintained at a high pressure of about 150 to 160 atm by the pressurizer 16 in order to suppress boiling of the primary cooling water in the core. You are in control.
  • the pressurized water reactor 12 light water is heated as the primary cooling water by the low-enriched uranium or MOX as the fuel (nuclear fuel), and the high-temperature primary cooling water is cooled with the pressurizer 16 maintained at a predetermined high pressure. It is sent to the steam generator 13 through the water pipe 14. In the steam generator 13, heat exchange is performed between the high-pressure and high-temperature primary cooling water and the secondary cooling water, and the cooled primary cooling water is returned to the pressurized water reactor 12 through the cooling water pipe 15.
  • the steam generator 13 is connected to a steam turbine 17 via a cooling water pipe 18, and the steam turbine 17 includes a high pressure turbine 19 and a low pressure turbine 20, and a generator 21 is connected thereto. Further, a moisture separation heater 22 is provided between the high pressure turbine 19 and the low pressure turbine 20, and a cooling water branch pipe 23 branched from the cooling water pipe 18 is connected to the moisture separation heater 22. On the other hand, the high pressure turbine 19 and the moisture separation heater 22 are connected by a low temperature reheat pipe 24, and the moisture separation heater 22 and the low pressure turbine 20 are connected by a high temperature reheat pipe 25.
  • the low-pressure turbine 20 of the steam turbine 17 has a condenser 26, and a condenser pipe 26 and a drain pipe 28 for supplying and discharging cooling water (for example, seawater) are connected to the condenser 26.
  • This intake pipe 27 has a circulating water pump 29, and the other end portion thereof is disposed in the sea together with the drain pipe 28.
  • the condenser 26 is connected to a deaerator 31 through a cooling water pipe 30, and a condensate pump 32 and a low-pressure feed water heater 33 are provided in the cooling water pipe 30.
  • the deaerator 31 is connected to the steam generator 13 via a cooling water pipe 34, and a water supply pump 35 and a high-pressure feed water heater 36 are provided in the cooling water pipe 34.
  • the steam generated by performing heat exchange with the high-pressure and high-temperature primary cooling water in the steam generator 13 is sent to the steam turbine 17 (from the high-pressure turbine 19 to the low-pressure turbine 20) through the cooling water pipe 18, and this steam is generated. Then, the steam turbine 17 is driven to generate power by the generator 21. At this time, the steam from the steam generator 13 drives the high pressure turbine 19, and then the moisture contained in the steam is removed and heated by the moisture separator / heater 22, and then the low pressure turbine 20 is driven.
  • the steam that has driven the steam turbine 17 is cooled with seawater in the condenser 26 to become condensed water, and is heated by the low-pressure steam extracted from, for example, the low-pressure turbine 20 in the low-pressure feed water heater 33 and deaerated. After impurities such as dissolved oxygen and uncondensed gas (ammonia gas) are removed by the vessel 31, the high pressure feed water heater 36 is heated by, for example, high pressure steam extracted from the high pressure turbine 19, and then the steam generator 13. Returned.
  • the body portion 41 has a sealed hollow cylindrical shape, and the lower portion has a slightly smaller diameter with respect to the upper portion. ing.
  • the body portion 41 is configured by joining an upper body 42 and a lower body 43 by welding.
  • a tube group outer cylinder 44 having a cylindrical shape with a predetermined distance from the inner wall surface of the lower barrel 43 is disposed in the lower barrel 43 of the trunk portion 41, and a lower end portion extends to the vicinity of the tube plate 45. Yes.
  • a plurality of tube support plates 46 are disposed in correspondence with a predetermined height position, and are supported by a plurality of stay rods 47 extending upward from the tube plate 45. ing.
  • the tube group outer tube 44 is provided therein with a heat transfer tube group 49 including a plurality of heat transfer tubes 48 having an inverted U shape, and an end portion of each heat transfer tube 48 is expanded to the tube plate 45.
  • the intermediate portion is supported by a plurality of tube support plates 46.
  • the tube support plate 46 has a large number of through holes (not shown), and each heat transfer tube 48 is inserted into and supported by the through holes.
  • the lower body 43 has a water chamber mirror 50 fixed to the lower end thereof, and is divided into an entrance chamber 52 and an exit chamber 53 by a partition wall 51, and an inlet nozzle 54 and an outlet nozzle 55 are formed.
  • One end portion of the first chamber communicates with the entrance chamber 52, and the other end portion communicates with the exit chamber 53.
  • the inlet nozzle 54 is connected to the cooling water pipe 14 described above, while the outlet nozzle 55 is connected to the cooling water pipe 15.
  • the upper body 42 is provided with an air / water separator 56 that separates the feed water into steam and hot water, and a moisture separator 57 that removes the moisture of the separated steam and makes it close to dry steam. It has been.
  • the upper body 42 is provided with a water supply pipe 58 for supplying secondary cooling water into the body 41 between the heat transfer tube group 49 and the steam separator 56, while a steam outlet is provided on the ceiling. 59 is formed. Then, the body 41 circulates the secondary cooling water supplied from the water supply pipe 58 into the body 41 between the body 41 and the tube group outer tube 44 and circulates upward in the tube plate 45.
  • the cooling water pipe 34 is connected to the water supply pipe 58, while the cooling water pipe 18 is connected to the steam outlet 59.
  • the primary cooling water heated in the pressurized water reactor 12 is sent to the entrance chamber 52 of the steam generator 13 through the coolant pipe 14, circulates through the numerous heat transfer tubes 48, and reaches the exit chamber 53.
  • the secondary cooling water cooled by the condenser 26 is sent to the water supply pipe 58 of the steam generator 13 through the cooling water pipe 34 and flows through the heat transfer pipe 48 through the water supply path 60 in the trunk portion 41.
  • Exchange heat with water primary cooling water. That is, heat is exchanged between the high-pressure and high-temperature primary cooling water and the secondary cooling water in the trunk portion 41, and the cooled primary cooling water passes from the outlet chamber 53 through the cooling water pipe 15 to the pressurized water reactor 12.
  • the secondary cooling water subjected to heat exchange with the high-pressure and high-temperature primary cooling water rises in the body 41 and is separated into steam and hot water by the steam-water separator 56, and this is separated by the moisture separator 57. After the moisture of the steam is removed, the steam is sent to the steam turbine 17 through the cooling water pipe 18.
  • the steam / water separator 56 is provided with mounting portions 63 and 64 of the assembly moving devices 61 and 62. That is, the steam / water separator 56 includes an intermediate deck plate 71 fixed to the inner wall surface of the upper body 42, and a lower deck plate 72 fixed to the inner wall surface of the upper body 42 and positioned below the intermediate deck plate 71. The plurality of risers 73 installed between the intermediate deck plate 71 and the lower deck plate 72 and swirl vanes 74 provided in each riser 73 are provided. The mounting portions 63 and 64 are provided on the outer peripheral portion of the intermediate deck plate 71 and the outer peripheral portion of the lower deck plate 72.
  • the lower barrel 43 in which the tube group outer tube 44, the heat transfer tube group 49, and the like are accommodated is supported in a sideways state, and moisture is separated from the lower barrel 43.
  • the upper body 42 in which the vessel 57, the steam separator 56 and the like are accommodated is disposed at a predetermined joining position.
  • the steam separator 56 is moved to a position close to the moisture separator 57 in the upper body 42 in advance, and a work space is secured between the steam separator 56 and the tube group outer tube 44. To do. Then, the worker uses the work space to join the upper body 42 and the lower body 43 from the inside by welding.
  • the assembly moving device (hereinafter referred to as the moving device) 61, 62 and the like will be described in detail.
  • the moving device As shown in FIGS. 1 to 5, when the upper trunk 42 is moved to the joining position with the lower trunk 43 by a crane (not shown), the steam separator 56 approaches the moisture separator 57 in the upper trunk 42.
  • the outer peripheral portion of the intermediate deck plate 71 is positioned on the inner wall surface of the upper trunk 42 by a plurality of temporary pressing members 101.
  • the two moving devices 61 are disposed on the inner wall surface of the upper body 42 and are mounted at positions that support the lower part of the intermediate deck plate 71.
  • the moving device 61 includes a pedestal 102 that can be attached to and detached from the mounting portion 63 of the steam / water separator 56, a manual jack (lifting / lowering device) 103 that can lift and lower the steam / water separator 56 via the gantry 102, and a gantry.
  • a chill tank (cart) 104 that is detachable with respect to 102, and a conversion device 105 that changes the traveling direction of the chill tank 104 with respect to the gantry 102.
  • the intermediate deck plate 71 is fixed to the support plate 111 by welding at predetermined positions (two locations) in the circumferential direction at the lower end when the intermediate deck plate 71 is laid down.
  • a mounting screw hole 111a is formed.
  • the support plate 111 and each mounting screw hole 111 a function as the mounting portion 63.
  • the mounting plate 112 is in close contact with the support plate 111, and a plurality of bolts 113 are fixed to the support plate 111 by screwing into the mounting screw holes 111a.
  • the support plate 114 is in close contact with the mounting plate 112 and the support plate 111 and is fixed to the mounting plate 112 and the support plate 111 with a plurality of bolts 115.
  • the support plate 114 is integrally formed with a support wall 116 at the center and a horizontal wall 117 at the bottom.
  • the mounting plate 112 has a lifting / lowering seat 118 fixed to a position extending sideways, and a manual jack 103 is installed on the inner wall surface of the upper body 42 positioned below the lifting / lowering seat 118.
  • the mounting plate 119 of the chill tank 104 is in close contact with the horizontal wall 117 and the support plate 114 is detachably fixed by a plurality of bolts (reverse rotation prevention members) 120.
  • the chill tank 104 is provided with an endless drive belt 122 so as to be hung around a plurality of wheels 121, and can run on the inner wall surface of the upper trunk 42.
  • the support plate 114 has a bearing 123 fixed to the upper surface of the horizontal wall 117, and a support lot 124 extending upward from the mounting plate 119 of the chill tank 104 is rotatably supported by the bearing 123.
  • a handle 125 is attached to the upper end of the support rod 124.
  • the gantry 102 is constituted by the mounting plate 112, the support plate 114 (support wall 116, horizontal wall 117), the lifting seat 118, and the like. Further, the conversion device 105 is constituted by the bearing portion 123, the support lot 124, and the handle 125.
  • the intermediate deck plate 71 is provided with a mounting portion 63 by fixing the support plate 111 having a plurality of mounting screw holes 111 a in advance, and the mounting plate 112 that constitutes the gantry 102 on the support plate 111. Can be fixed by a plurality of bolts 113. Then, the plurality of temporary holding members 101 are loosened to release the positioning in the plane direction of the intermediate deck plate 71 in the upper trunk 42, that is, the vertical direction in FIG. 2, and the manual jack 103 is extended to extend the frame 102. Thus, the intermediate deck plate 71 can be raised.
  • the chill tank 104 is arranged below the gantry 102, and the mounting plate 119 of the chill tank 104 is brought into close contact with the horizontal wall 117 of the support plate 114 constituting the gantry 102 while inserting the support rod 124 into the bearing portion 123.
  • the chill tank 104 can be mounted by fixing with the bolt 120 of the above.
  • the traveling direction of the chill tank 104 can be changed by 90 degrees by rotating the handle 125 by 90 degrees while the intermediate deck plate 71 is raised by the manual jack 103 and the plurality of bolts 120 are loosened. .
  • the steam separator 56 separates moisture in the upper trunk 42.
  • the outer peripheral portion of the lower deck plate 72 as well as the intermediate deck plate 71 described above is positioned on the inner wall surface of the upper body 42 by a plurality of temporary pressing members 131.
  • the two moving devices 62 are disposed on the inner wall surface of the upper body 42 and are mounted at positions that support the lower portion of the lower deck plate 72.
  • the moving device 62 includes a pedestal 132 detachably attached to the mounting portion 64 of the steam / water separator 56, a manual jack (lifting / lowering device) 133 that can lift and lower the steam / water separator 56 via the pedestal 132, and a cradle.
  • a chill tank (cart) 134 that is detachable with respect to 132 and a conversion device 135 that changes the traveling direction of the chill tank 134 with respect to the gantry 132 are configured.
  • the lower deck plate 72 is fixed to the support plate 141 by welding at predetermined positions (two locations) in the circumferential direction at the lower end when the lower deck plate 72 is laid down.
  • a mounting screw hole 141a is formed.
  • the support plate 141 and each mounting screw hole 141 a function as the mounting portion 64.
  • the support plate 142 is fixed to the support plate 141 by being in close contact with the support plate 141 and screwing a plurality of bolts 143 into the mounting screw holes 141a.
  • the support plate 142 is integrally formed with a support wall 144 at a central portion thereof, and a horizontal wall 145 is integrally formed at a lower portion thereof.
  • the support plate 142 has a first connection bracket 146 fixed to the lower surface of the horizontal wall 145 by a plurality of bolts 147, and a second connection bracket 148 fixed to the lower surface of the first connection bracket 146 by a plurality of bolts 149. ing.
  • the first connecting bracket 146 has a lifting / lowering seat 150 fixed to a position extending laterally, and a manual jack 133 is installed on the inner wall surface of the upper body 42 positioned below the lifting / lowering seat 150.
  • the second connection bracket 148 has a mounting plate 151 of the chill tank 134 in close contact with the lower portion, and is detachably fixed by a plurality of bolts (reverse rotation prevention members) 152.
  • the chill tank 134 is provided with an endless drive belt 154 so as to be hung around a plurality of wheels 153, and can travel on the inner wall surface of the upper body 42.
  • the second connecting bracket 148 has a bearing portion 155 fixed to the lower portion thereof, and a support lot 156 extending upward from the mounting plate 151 of the chill tank 134 is rotatably supported by the bearing portion 155.
  • the support rod 156 A handle 157 is attached to the upper end of the.
  • the pedestal 132 is constituted by the support plate 142 (support wall 144, horizontal wall 145), the first connection bracket 146, the second connection bracket 148, the lifting seat 150, and the like. Further, the conversion unit 135 is configured by the bearing portion 155, the support lot 156, and the handle 157.
  • the lower deck plate 72 is provided with the mounting portion 64 by fixing the support plate 141 having a plurality of mounting screw holes 141 a in advance, and the support plate 142 constituting the mount 132 on the support plate 141. Can be fixed with a plurality of bolts 143. Then, the plurality of temporary pressing members 131 are loosened to release the positioning in the plane direction of the lower deck plate 72 in the upper trunk 42, that is, the vertical direction in FIG. 6, and the manual jack 133 is extended to extend through the gantry 132. Thus, the lower deck plate 72 can be raised.
  • the chill tank 134 is disposed below the pedestal 132, and the mounting plate 151 of the chill tank 134 is brought into close contact with the lower portion of the second connection bracket 148 constituting the pedestal 132 while the support rod 156 is inserted into the bearing portion 155.
  • the chill tank 134 can be mounted by fixing with the bolt 152.
  • the traveling direction of the chill tank 134 can be changed by 90 degrees by rotating the handle 157 by 90 degrees while the lower deck plate 72 is raised by the manual jack 133 and the plurality of bolts 152 are loosened. .
  • the steam generator assembling method of the present embodiment has a moisture content inside the lower barrel 43 in which the tube group outer tube 44 and the heat transfer tube group 49 are accommodated and supported sideways.
  • the steam-water separator moving step includes a mounting step of mounting the steam-water separator 56 on the moving device, and a circumferential position of the steam-water separator 56 by the moving device. And a moving step of moving the steam / water separator 56 to the upper end side of the tube group outer cylinder 44 after changing the direction of the moving device.
  • step S11 a lower trunk 43 that accommodates the tube group outer tube 44 and the heat transfer tube group 49 is laid sideways and a gantry not shown in the figure.
  • step S12 the upper body 42 in which the moisture separator 57 and the steam separator 56 are housed is laid down and supported on a gantry (not shown).
  • the upper body 42 is temporarily fixed by disposing the steam / water separator 56 at a position closer to the moisture separator 57 than the regular fixing position, and the lower end part is the lower body 43. It arrange
  • step S13 the upper body 42 and the lower body 43 are joined from the inside of the body portion 41 by welding using a welding device (not shown).
  • a welding device not shown.
  • the steam / water separator 56 is disposed at a position close to the moisture separator 57, the steam / separator 56 and the tube group outer cylinder 44, that is, the upper trunk 42 and the lower trunk 43.
  • a work space is secured on the inner side of the joining position A, and the worker can perform welding work using this work space.
  • step S15 as shown in FIG. 10, the chain 162 and the lever block (registered trademark) (torque wrench) 163 are mounted on the two suspension pieces 161, respectively. That is, the steam separator 56 is provided with a reinforcing flange 72a on the lower deck plate 72, and the suspension piece 161 is fixed to the end of the flange 72a by welding or bolts.
  • the tube group outer tube 44 fixes the support piece 164 to the inside thereof by welding or bolts.
  • the chain 162 has one end locked to the suspension piece 161 and the other end engaged with the support piece 164.
  • the lever block 163 is mounted in the vicinity of the support piece 164 and connects the other end of the chain 162.
  • step S16 on the intermediate deck plate 71 side, the gantry 102 is fixed to the support plate 111 fixed in advance, and the manual jack 103 is arranged corresponding to the gantry 102. Further, on the lower deck plate 72 side, the pedestal 132 is fixed to a support plate 141 fixed in advance, and a manual jack 133 is disposed corresponding to the pedestal 132.
  • step S17 the manual jack 103 is extended to raise the intermediate deck plate 71 via the gantry 102, the chill tank 104 is attached to the lower part of the gantry 102, and then the manual jack 103 is contracted to the middle.
  • the deck plate 71 is lowered, and the chill tank 104 is installed on the inner wall surface of the upper trunk 42. Further, the manual jack 133 is extended so that the lower deck plate 72 is raised through the pedestal 132, the chill tank 134 is attached to the lower part of the pedestal 132, the manual jack 133 is contracted, and the lower deck plate 72 is lowered.
  • the chill tank 134 is installed on the inner wall surface of the upper trunk 42.
  • step S18 the circumferential direction of the steam separator 56 is adjusted.
  • the travelable direction is the circumferential direction of the upper trunk 42. Therefore, the position of the steam separator 56 in the circumferential direction is adjusted with respect to the upper trunk 42 by moving the steam separator 56 alone in the circumferential direction of the upper trunk 42 by the moving devices 61 and 62.
  • the direction of the chill tanks 104 and 134 is changed in step S19.
  • the deck jacks 71 and 72 are raised by the manual jacks 103 and 133, the plurality of bolts 120 and 152 are loosened, and the handles 125 and 157 are rotated 90 degrees, so that the chill tanks 104 and 134 are rotated 90 degrees.
  • the travelable direction is changed to the axial direction of the upper trunk 42.
  • step S20 the steam / water separator 56 is moved away from the moisture separator 57 using the lever block 163 and moved to a position where it is in close contact with the upper end of the tube group outer tube 44. That is, as shown in FIG. 10, two workers (one person in the figure) operate the lever block 163 at the same time and pull the chain 162 to wind up the air / water separator 56. It moves to the tube group outer tube 44 side. At this time, the temporary holding members 101 and 131 are loosened to release the positioning of the deck plates 71 and 72 in the upper body 42 in the axial direction, that is, in the horizontal direction in FIG.
  • step S21 when the position of the steam / water separator 56 is shifted in the height direction with respect to the tube group outer tube 44, the steam / water separator 56 is moved up and down using the manual jacks 103 and 133, and the both are aligned. I do.
  • step S22 as shown in FIG. 12, the inner side of the lower deck plate 72 in the steam / water separator 56 is welded B while being in contact with the upper end of the tube group outer cylinder 44.
  • the outer peripheral portion of the steam / water separator 56 is supported on the inner wall surface of the trunk portion 41 by the support members 171, 172 and the like.
  • the steam separator 56 and the moisture separator 57 are connected by a pipe 75 or the like. Therefore, the steam / water separator 56 is fixed at a regular position in the body portion 41.
  • step S23 the pedestals 102 and 132, the manual jacks 103 and 133, the chill tanks 104 and 134, the suspension piece 161, the chain 162, the lever block 163, the support piece 164, and the like are removed. Thereby, the assembly work of the steam generator 13 is completed.
  • the assembly moving devices 61 and 62 can be easily attached to the steam / water separator 56 via the mounting portions 63 and 64, and the steam / water separator 56 is previously placed in the moisture state. By disposing it on the side closer to the separator 57, a working space for joining the upper barrel 42 and the lower barrel 43 can be secured inside, and then the air and water are separated by the assembling moving devices 61 and 62. By moving the vessel 56 to a predetermined position, it can be properly fixed, and the workability in the assembly work of the steam generator 13 can be improved.
  • the steam separator 56 is provided with an intermediate deck plate 71, a lower deck plate 72, risers 73 installed between the deck plates 71, 72,
  • the mounting portions 63 and 64 are provided on the deck plates 71 and 72, respectively. Therefore, the assembly moving devices 61 and 62 can be mounted on the intermediate deck plate 71 and the lower deck plate 72 via the mounting portions 63 and 64, respectively. 56 can be moved stably.
  • the moisture separator 57 is evacuated to the inside of the lower barrel 43 in which the tube group outer tube 44 and the heat transfer tube group 49 are accommodated and supported sideways.
  • the steam separator 56 by storing the steam separator 56 in a position close to the moisture separator 57 in advance, it is possible to secure a working space for joining the upper barrel 42 and the lower barrel 43 by welding. Then, the steam / water separator 56 can be moved and joined to a position in close contact with the upper end portion of the tube group outer cylinder 44, and the workability in the assembly operation of the steam generator 13 can be improved.
  • the mounting process of mounting the steam / water separator 56 on the moving devices 61 and 62 and the moving device 61 and 62 of the steam / water separator 56 are performed.
  • a position adjusting process for adjusting the circumferential position and a moving process for moving the steam-water separator 56 to the upper end side of the tube group outer cylinder 44 after changing the direction of the moving devices 61 and 62 are provided. Therefore, before moving the steam / water separator 56 to the upper end side of the tube group outer cylinder 44 by the moving devices 61 and 62, the circumferential position of the steam / water separator 56 is adjusted by the moving devices 61 and 62. It is possible to mount the steam separator 56 with high accuracy.
  • the gantry 102 and 132 detachably attached to the front and rear of the steam and water separator 56, and the steam and water separator 56 can be moved up and down via the gantry 102 and 132.
  • the mounting portions 63 and 64 are the support plates 111 and 141 (respective mounting screw holes 111a and 141a) fixed to the deck plates 71 and 72.
  • the present invention is limited to this configuration. is not.
  • the mounting screw holes 111a and 141a may be formed directly on the deck plates 71 and 72 without the support plates 111 and 141, respectively.
  • not only the mounting screw holes 111a and 141a but also bolt through holes, stud bolts, mounting flanges, and the like may be used.
  • the steam generator, the steam generator assembling method, and the steam / water separator moving device secure a work space by moving the steam / water separator when joining the upper and lower shells.

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Abstract

Provided are a steam generator, a method for assembling the steam generator, and moving devices of a steam-water separator. A body part (41) is formed by joining an upper body part (42) and a lower body part (43) together, a heat transfer pipe group (49) is disposed in the body part (41), and the steam-water separator (56) and a moisture separator (57) are disposed in the upper body part (42) above the heat transfer pipe group (49). Attachment parts (63, 64) of the moving devices (61, 62) for assembly are provided in the steam-water separator (56). It is therefore possible to improve the ease of assembly work.

Description

蒸気発生器、蒸気発生器の組立方法、気水分離器の移動装置Steam generator, steam generator assembly method, moving device for steam separator
　本発明は、原子力プラントに熱交換器として使用される蒸気発生器、蒸気発生器の組立方法、気水分離器の移動装置に関するものである。 The present invention relates to a steam generator used as a heat exchanger in a nuclear power plant, a method for assembling the steam generator, and a moving device for the steam separator.
　例えば、加圧水型原子炉（ＰＷＲ：Pressurized　Water　Reactor）では、軽水を原子炉冷却材及び中性子減速材として使用し、炉心全体にわたって沸騰しない高温高圧水とし、この高温高圧水を蒸気発生器に送って熱交換により蒸気を発生させ、この蒸気をタービン発電機へ送って発電するものである。そして、この加圧水型原子炉は、高温高圧の一次冷却水の熱を蒸気発生器により二次冷却水に伝え、二次冷却水で水蒸気を発生させるものである。この蒸気発生器は、多数の細い伝熱管の内側を一次冷却水が流れ、外側を流れる二次冷却水に熱を伝えて水蒸気を生成し、この水蒸気によりタービンを回して発電している。 For example, in a pressurized water reactor (PWR), light water is used as a reactor coolant and neutron moderator, and high temperature and high pressure water that does not boil throughout the core is sent to a steam generator. Steam is generated by heat exchange, and the steam is sent to a turbine generator for power generation. In this pressurized water reactor, the heat of the high-temperature and high-pressure primary cooling water is transmitted to the secondary cooling water by the steam generator, and steam is generated by the secondary cooling water. In this steam generator, primary cooling water flows inside a large number of thin heat transfer tubes, heat is transferred to secondary cooling water flowing outside, and steam is generated, and a turbine is rotated by the steam to generate electric power.
　この蒸気発生器において、中空密閉形状をなす胴部内に、その内壁面と所定間隔をもって管群外筒が配設され、この管群外筒内に逆Ｕ字形状をなす複数の伝熱管が配設され、各伝熱管の端部が管板に支持され、胴部の下端部に一次冷却水の入口側水室鏡及び出口側水室鏡が形成されている。また、胴部内に、管群外筒の上方に位置して二次冷却水の入口部が設けられると共に、気水分離器と湿分分離器が上下に並んで配設され、その上方に蒸気出口が設けられている。 In this steam generator, a tube group outer cylinder is disposed at a predetermined distance from the inner wall surface in a hollow hermetically sealed body portion, and a plurality of inverted U-shaped heat transfer tubes are arranged in the tube group outer cylinder. An end portion of each heat transfer tube is supported by the tube plate, and an inlet side water chamber mirror and an outlet side water chamber mirror of the primary cooling water are formed at the lower end portion of the trunk portion. In addition, an inlet portion of the secondary cooling water is provided in the trunk portion above the outer tube of the tube group, and a steam / water separator and a moisture separator are arranged side by side, above which steam is placed. There is an exit.
　従って、冷却水配管より入口側水室鏡を通して複数の伝熱管に一次冷却水が供給される一方、入口部からこの胴部内に二次冷却水が供給される。すると、複数の伝熱管内を流れる一次冷却水（熱水）と胴部内を循環する二次冷却水（冷水）との間で熱交換を行われることで、二次冷却水が熱を吸収して水蒸気が生成される。そして、生成された蒸気が気水分離器により水分が除去され、湿分分離器により湿分が除去された蒸気が蒸気出口から排出される一方、熱交換を終了した一次冷却水が出口側水室鏡から排出される。 Therefore, the primary cooling water is supplied from the cooling water pipe to the plurality of heat transfer tubes through the inlet side water chamber mirror, while the secondary cooling water is supplied from the inlet portion into the trunk portion. Then, heat exchange is performed between the primary cooling water (hot water) flowing in the plurality of heat transfer tubes and the secondary cooling water (cold water) circulating in the body, so that the secondary cooling water absorbs heat. Water vapor is generated. Then, moisture is removed from the generated steam by the steam separator, and the steam from which moisture has been removed by the moisture separator is discharged from the steam outlet, while the primary cooling water that has finished heat exchange is discharged from the outlet side water. It is discharged from the mirror.
特開２００７－１４７１３８号公報JP 2007-147138 A
　上述した従来の蒸気発生器を組み立てる場合、胴部を上部胴と下部胴とに分割し、上部胴内に気水分離器や湿分分離器などを収容する一方、下部胴内に管群外筒や複数の伝熱管などを収容し、この状態でこの上部胴と下部胴とを横倒しにして両者を溶接により接合して組み立てている。 When assembling the conventional steam generator described above, the body is divided into an upper body and a lower body, and an air / water separator, a moisture separator, etc. are accommodated in the upper body, while outside the tube group in the lower body. A cylinder, a plurality of heat transfer tubes, and the like are accommodated, and in this state, the upper body and the lower body are laid sideways and joined together by welding.
　近年、蒸気発生器の小型化が進み、胴部内には、管群外筒、複数の伝熱管、気水分離器、湿分分離器などがほとんど隙間なく収容されている。ところが、上述したように上部胴と下部胴とを溶接により接合する位置は、管群外筒の上端と気水分離器の下端との間の位置である。この空間にはほとんどスペースがなく、作業者が胴部に入り、上部胴と下部胴とを溶接により接合することは困難であり、作業者にかかる負担が大きい。 In recent years, steam generators have been miniaturized, and a tube group outer cylinder, a plurality of heat transfer tubes, a steam separator, a moisture separator, and the like are accommodated in the trunk without any gaps. However, as described above, the position where the upper body and the lower body are joined by welding is a position between the upper end of the tube group outer cylinder and the lower end of the steam / water separator. There is almost no space in this space, and it is difficult for an operator to enter the torso and joining the upper torso and the lower torso by welding, which places a heavy burden on the operator.
　本発明は、上述した課題を解決するものであり、組立作業の作業性の向上を可能とする蒸気発生器、蒸気発生器の組立方法、気水分離器の移動装置を提供することを目的とする。 An object of the present invention is to solve the above-described problems, and to provide a steam generator, a method for assembling the steam generator, and a moving device for the steam / water separator that can improve the workability of the assembly work. To do.
　上記の目的を達成するための本発明の蒸気発生器は、中空密閉形状をなして上部胴と下部胴が接合されてなる胴部と、該胴部内に逆Ｕ字形状をなすように配設されて一次冷却水が流動する複数の伝熱管からなる伝熱管群と、前記胴部内の下部に固定されて前記複数の伝熱管の端部を支持する管板と、前記胴部の下端部に設けられて前記複数の伝熱管の各端部に連通する入口側水室鏡及び出口側水室鏡と、前記胴部内に二次冷却水を供給する給水部と、前記胴部内における前記伝熱管群の上方に配設される気水分離器と、前記胴部内における前記気水分離器の上方に配設される湿分分離器と、前記胴部の上端部に設けられる蒸気出口と、を備える蒸気発生器において、前記気水分離器に組立用移動装置の取付部が設けられる、ことを特徴とするものである。 In order to achieve the above object, a steam generator according to the present invention has a hollow hermetically sealed body part in which an upper body and a lower body are joined, and a reverse U-shape is formed in the body part. A heat transfer tube group composed of a plurality of heat transfer tubes through which primary cooling water flows, a tube plate fixed to a lower portion in the body portion and supporting ends of the plurality of heat transfer tubes, and a lower end portion of the body portion An inlet-side water chamber mirror and an outlet-side water chamber mirror that are provided and communicated with each end of the plurality of heat transfer tubes, a water supply unit that supplies secondary cooling water into the body, and the heat transfer tubes in the body A steam separator disposed above the group, a moisture separator disposed above the steam separator in the trunk, and a steam outlet provided at an upper end of the trunk. In the steam generator, the steam separator is provided with a mounting portion for the assembly moving device. It is intended.
　従って、蒸気発生器の組立時に、気水分離器に取付部を介して容易に組立用移動装置を装着することができ、予め気水分離器を湿分分離器に接近した側に配置することで、内部に上部胴と下部胴とを接合するための作業空間を確保することができ、その後、組立用移動装置により気水分離器を所定の位置に移動することで、適正に固定することができ、蒸気発生器の組立作業における作業性を向上することができる。 Therefore, when assembling the steam generator, the assembly moving device can be easily attached to the steam / water separator via the mounting portion, and the steam / water separator is arranged on the side close to the moisture separator in advance. Therefore, it is possible to secure a working space for joining the upper body and the lower body inside, and then fix the gas / water separator appropriately by moving it to a predetermined position by the moving device for assembly. Therefore, the workability in the assembly operation of the steam generator can be improved.
　本発明の蒸気発生器では、前記気水分離器は、前記胴部の内壁面に固定される中間デッキプレートと、前記胴部の内壁面に固定されて前記中間デッキプレートの下方に位置する下部デッキプレートと、前記中間デッキプレートと前記下部デッキプレートの間に架設されるライザと、該ライザ内に設けられるベーンとを有し、前記取付部は、前記中間デッキプレート及び前記下部デッキプレートに設けられることを特徴としている。 In the steam generator of the present invention, the steam / water separator includes an intermediate deck plate fixed to the inner wall surface of the trunk portion, and a lower portion fixed to the inner wall surface of the trunk portion and positioned below the intermediate deck plate. A deck plate, a riser installed between the intermediate deck plate and the lower deck plate, and a vane provided in the riser, and the mounting portion is provided on the intermediate deck plate and the lower deck plate. It is characterized by being able to.
　従って、中間デッキプレートと下部デッキプレートに各取付部を介して組立用移動装置をそれぞれ装着することが可能となり、この組立用移動装置により気水分離器を安定して移動することができる。 Therefore, the assembly moving device can be mounted on the intermediate deck plate and the lower deck plate via the mounting portions, respectively, and the air / water separator can be stably moved by the assembly moving device.
　また、本発明の蒸気発生器の組立方法は、内部に管群外筒及び伝熱管群が収容されて横倒しに支持された下部胴に対して内部に湿分分離器に気水分離器が接近した位置に収容された上部胴を所定の接合位置に配置する胴部配置工程と、内部から前記上部胴と前記下部胴とを溶接により接合する胴部接合工程と、前記気水分離器を前記湿分分離器から離間して前記管群外筒の上端部に密着する位置に移動する気水分離器移動工程と、前記管群外筒の上端部に前記気水分離器を溶接により接合する気水分離器接合工程と、を有することを特徴とするものである。 In addition, the steam generator assembly method of the present invention is a method in which a steam / water separator approaches a moisture separator inside a lower trunk that is accommodated in a tube casing and a heat transfer tube group. A trunk part arranging step of arranging the upper trunk accommodated in the predetermined position at a predetermined joining position, a trunk part joining step of joining the upper trunk and the lower trunk from inside by welding, and the steam separator A steam-water separator moving step of moving to a position where it is separated from the moisture separator and closely contacts the upper end of the tube group outer cylinder, and the steam / water separator is joined to the upper end of the tube group outer cylinder by welding. A steam-water separator joining step.
　従って、予め気水分離器を湿分分離器に接近した位置に収容することで、内部に上部胴と下部胴とを溶接により接合するための作業空間を確保することができ、その後、気水分離器を管群外筒の上端部に密着する位置に移動して接合することができ、蒸気発生器の組立作業における作業性を向上することができる。 Therefore, by storing the steam separator in advance at a position close to the moisture separator, it is possible to secure a working space for joining the upper shell and the lower shell by welding inside, and then The separator can be moved and joined to a position in close contact with the upper end of the tube group outer cylinder, and the workability in the assembly operation of the steam generator can be improved.
　本発明の蒸気発生器の組立方法では、前記気水分離器移動工程は、前記気水分離器を移動装置に搭載する搭載工程と、前記移動装置により前記気水分離器の周方向位置の調整を行う位置調整工程と、前記移動装置を方向転換してから前記気水分離器を前記管群外筒の上端部側に移動する移動工程と、を有することを特徴としている。 In the steam generator assembling method of the present invention, the steam-water separator moving step includes a mounting step of mounting the steam-water separator on a moving device, and adjustment of a circumferential position of the steam-water separator by the moving device. And a moving step of moving the steam / water separator to the upper end side of the tube group outer cylinder after changing the direction of the moving device.
　従って、移動装置により気水分離器を管群外筒の上端部側に移動する前に、この移動装置により気水分離器の周方向位置の調整を行うことができ、気水分離器の高精度な装着を可能とすることができる。 Therefore, before moving the steam / water separator to the upper end side of the tube group outer cylinder by the moving device, the circumferential position of the steam / water separator can be adjusted by the moving device. Accurate mounting can be made possible.
　また、本発明の気水分離器の移動装置は、内部に管群外筒及び伝熱管群が収容された下部胴と内部に湿分分離器及び気水分離器が収容された上部胴とを横倒し状態で接合するときに前記気水分離器を移動可能な移動装置であって、前記気水分離器の前後に着脱自在な架台と、該架台を介して前記気水分離器を昇降自在な昇降装置と、前記架台に着脱自在な台車と、前記架台に対して台車の走行方向を転換する転換装置と、を備えることを特徴とするものである。 Further, the moving device of the steam / water separator according to the present invention comprises a lower shell in which a tube group outer cylinder and a heat transfer tube group are housed, and an upper shell in which a moisture separator and a steam / water separator are housed. A moving device capable of moving the steam / water separator when joined in a lying state, wherein the steam / water separator is detachable before and after the steam / water separator, and the steam / water separator can be moved up and down via the rack. A lifting device, a carriage that is detachably attached to the gantry, and a conversion device that changes a traveling direction of the trolley with respect to the gantry.
　従って、上部胴と下部胴を接合するとき、移動装置により気水分離器を管群外筒の上端部側に移動する前に、この移動装置により気水分離器の周方向位置の調整を行うことができ、気水分離器の高精度な装着を可能とすることができる。 Therefore, when the upper and lower shells are joined, the moving device adjusts the circumferential position of the steam / water separator before the moving device moves the steam / water separator to the upper end side of the tube group outer cylinder. It is possible to mount the steam / water separator with high accuracy.
　本発明の蒸気発生器、蒸気発生器の組立方法、気水分離器の移動装置によれば、上部胴と下部胴とを接合するときに、上部胴内の気水分離器を湿分分離器に接近した位置に予め移動しておき、気水分離器と管群外筒との間に作業スペースを確保するので、蒸気発生器の組立作業における作業性を向上することができる。 According to the steam generator, the steam generator assembly method, and the steam / water separator moving device of the present invention, when the upper shell and the lower shell are joined, the steam / water separator in the upper shell is a moisture separator. Since the working space is secured between the steam-water separator and the tube group outer cylinder in advance, the workability in the assembly operation of the steam generator can be improved.
図１は、本発明の一実施例に係る蒸気発生器の組立方法を表す概略図である。FIG. 1 is a schematic view showing a method of assembling a steam generator according to an embodiment of the present invention. 図２は、本実施例の蒸気発生器における気水分離器の中間デッキプレートを表す図１のII－II断面図である。2 is a cross-sectional view taken along the line II-II in FIG. 1 showing an intermediate deck plate of the steam separator in the steam generator of this embodiment. 図３は、中間デッキプレート用の移動装置の正面図である。FIG. 3 is a front view of the moving device for the intermediate deck plate. 図４は、中間デッキプレート用の移動装置の側面図である。FIG. 4 is a side view of the moving device for the intermediate deck plate. 図５は、中間デッキプレート用の移動装置の平面図である。FIG. 5 is a plan view of the moving device for the intermediate deck plate. 図６は、本実施例の蒸気発生器における気水分離器の下部デッキプレートを表す図１のIII－III断面図である。FIG. 6 is a cross-sectional view taken along the line III-III in FIG. 1 showing the lower deck plate of the steam separator in the steam generator of this embodiment. 図７は、下部デッキプレート用の移動装置の正面図である。FIG. 7 is a front view of the moving device for the lower deck plate. 図８は、下部デッキプレート用の移動装置の側面図である。FIG. 8 is a side view of the moving device for the lower deck plate. 図９は、下部デッキプレート用の移動装置の平面図である。FIG. 9 is a plan view of a moving device for the lower deck plate. 図１０は、移動装置による気水分離器の移動方法を表す概略図である。FIG. 10 is a schematic diagram illustrating a method of moving the steam separator by the moving device. 図１１は、移動装置による気水分離器の移動方法を表す概略図である。FIG. 11 is a schematic diagram illustrating a method of moving the steam separator by the moving device. 図１２は、気水分離器の接合方法を表す要部拡大断面図である。FIG. 12 is an enlarged cross-sectional view of a main part illustrating a joining method of the steam / water separator. 図１３は、本実施例の蒸気発生器の組立方法を表す作用説明図である。FIG. 13 is an operation explanatory view showing the method of assembling the steam generator of this embodiment. 図１４は、本実施例の蒸気発生器の組立方法の手順を表すフローチャートである。FIG. 14 is a flowchart showing the procedure of the method for assembling the steam generator of this embodiment. 図１５は、本実施例の蒸気発生器が適用された原子力発電プラントの概略構成図である。FIG. 15 is a schematic configuration diagram of a nuclear power plant to which the steam generator of the present embodiment is applied. 図１６は、本実施例の蒸気発生器を表す概略構成図である。FIG. 16 is a schematic configuration diagram illustrating a steam generator according to the present embodiment.
　以下に添付図面を参照して、本発明に係る蒸気発生器、蒸気発生器の組立方法、気水分離器の移動装置の好適な実施例を詳細に説明する。なお、この実施例により本発明が限定されるものではない。 Hereinafter, preferred embodiments of a steam generator, a steam generator assembly method, and a steam-water separator moving device according to the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example.
　図１は、本発明の一実施例に係る蒸気発生器の組立方法を表す概略図、図２は、本実施例の蒸気発生器における気水分離器の中間デッキプレートを表す図１のII－II断面図、図３は、中間デッキプレート用の移動装置の正面図、図４は、中間デッキプレート用の移動装置の側面図、図５は、中間デッキプレート用の移動装置の平面図、図６は、本実施例の蒸気発生器における気水分離器の下部デッキプレートを表す図１のIII－III断面図、図７は、下部デッキプレート用の移動装置の正面図、図８は、下部デッキプレート用の移動装置の側面図、図９は、下部デッキプレート用の移動装置の平面図、図１０は、移動装置による気水分離器の移動方法を表す概略図、図１１は、移動装置による気水分離器の移動方法を表す概略図、図１２は、気水分離器の接合方法を表す要部拡大断面図、図１３は、本実施例の蒸気発生器の組立方法を表す作用説明図、図１４は、本実施例の蒸気発生器の組立方法の手順を表すフローチャート、図１５は、本実施例の蒸気発生器が適用された原子力発電プラントの概略構成図、図１６は、本実施例の蒸気発生器を表す概略構成図である。 FIG. 1 is a schematic view showing a method of assembling a steam generator according to one embodiment of the present invention, and FIG. 2 is a sectional view of an intermediate deck plate of a steam / water separator in the steam generator of this embodiment. II sectional view, FIG. 3 is a front view of the moving device for the intermediate deck plate, FIG. 4 is a side view of the moving device for the intermediate deck plate, and FIG. 5 is a plan view of the moving device for the intermediate deck plate. 6 is a cross-sectional view taken along the line III-III of FIG. 1 showing the lower deck plate of the steam separator in the steam generator of the present embodiment, FIG. 7 is a front view of the moving device for the lower deck plate, and FIG. FIG. 9 is a plan view of the moving device for the lower deck plate, FIG. 10 is a schematic diagram showing a method of moving the steam / water separator by the moving device, and FIG. 11 is the moving device. FIG. 12 is a schematic diagram showing a method of moving the steam separator according to FIG. 13 is an enlarged cross-sectional view of the main part showing the joining method of the separator, FIG. 13 is an operation explanatory view showing the assembling method of the steam generator of this embodiment, and FIG. 14 shows the procedure of the assembling method of the steam generator of this embodiment. FIG. 15 is a schematic configuration diagram of a nuclear power plant to which the steam generator of the present embodiment is applied, and FIG. 16 is a schematic configuration diagram illustrating the steam generator of the present embodiment.
　本実施例の原子炉は、軽水を原子炉冷却材及び中性子減速材として使用し、炉心全体にわたって沸騰しない高温高圧水とし、この高温高圧水を蒸気発生器に送って熱交換により蒸気を発生させ、この蒸気をタービン発電機へ送って発電する加圧水型原子炉（ＰＷＲ：Pressurized　Water　Reactor）である。 The nuclear reactor of this embodiment uses light water as a reactor coolant and neutron moderator, and generates high-temperature and high-pressure water that does not boil over the entire core and sends this high-temperature and high-pressure water to a steam generator to generate steam by heat exchange. This is a pressurized water reactor (PWR) that sends this steam to a turbine generator to generate electricity.
　本実施例の加圧水型原子炉を有する原子力発電プラントにおいて、図１５に示すように、原子炉格納容器１１内には、加圧水型原子炉１２及び蒸気発生器１３が格納されており、この加圧水型原子炉１２と蒸気発生器１３とは冷却水配管１４，１５を介して連結されており、冷却水配管１４に加圧器１６が設けられ、冷却水配管１５に冷却水ポンプ１５ａが設けられている。この場合、減速材及び一次冷却水（冷却材）として軽水を用い、炉心部における一次冷却水の沸騰を抑制するために、一次冷却系統は加圧器１６により１５０～１６０気圧程度の高圧状態を維持するように制御している。従って、加圧水型原子炉１２にて、燃料（原子燃料）として低濃縮ウランまたはＭＯＸにより一次冷却水として軽水が加熱され、高温の一次冷却水が加圧器１６により所定の高圧に維持した状態で冷却水配管１４を通して蒸気発生器１３に送られる。この蒸気発生器１３では、高圧高温の一次冷却水と二次冷却水との間で熱交換が行われ、冷やされた一次冷却水は冷却水配管１５を通して加圧水型原子炉１２に戻される。 In the nuclear power plant having a pressurized water reactor of the present embodiment, as shown in FIG. 15, a pressurized water reactor 12 and a steam generator 13 are stored in a reactor containment vessel 11, and this pressurized water type is stored. The reactor 12 and the steam generator 13 are connected via cooling water pipes 14 and 15, a pressurizer 16 is provided in the cooling water pipe 14, and a cooling water pump 15 a is provided in the cooling water pipe 15. . In this case, light water is used as the moderator and primary cooling water (cooling material), and the primary cooling system is maintained at a high pressure of about 150 to 160 atm by the pressurizer 16 in order to suppress boiling of the primary cooling water in the core. You are in control. Therefore, in the pressurized water reactor 12, light water is heated as the primary cooling water by the low-enriched uranium or MOX as the fuel (nuclear fuel), and the high-temperature primary cooling water is cooled with the pressurizer 16 maintained at a predetermined high pressure. It is sent to the steam generator 13 through the water pipe 14. In the steam generator 13, heat exchange is performed between the high-pressure and high-temperature primary cooling water and the secondary cooling water, and the cooled primary cooling water is returned to the pressurized water reactor 12 through the cooling water pipe 15.
　蒸気発生器１３は、蒸気タービン１７と冷却水配管１８を介して連結されており、この蒸気タービン１７は高圧タービン１９及び低圧タービン２０を有すると共に、発電機２１が接続されている。また、高圧タービン１９と低圧タービン２０との間には、湿分分離加熱器２２が設けられており、冷却水配管１８から分岐した冷却水分岐配管２３が湿分分離加熱器２２に連結される一方、高圧タービン１９と湿分分離加熱器２２は低温再熱管２４により連結され、湿分分離加熱器２２と低圧タービン２０は高温再熱管２５により連結されている。 The steam generator 13 is connected to a steam turbine 17 via a cooling water pipe 18, and the steam turbine 17 includes a high pressure turbine 19 and a low pressure turbine 20, and a generator 21 is connected thereto. Further, a moisture separation heater 22 is provided between the high pressure turbine 19 and the low pressure turbine 20, and a cooling water branch pipe 23 branched from the cooling water pipe 18 is connected to the moisture separation heater 22. On the other hand, the high pressure turbine 19 and the moisture separation heater 22 are connected by a low temperature reheat pipe 24, and the moisture separation heater 22 and the low pressure turbine 20 are connected by a high temperature reheat pipe 25.
　更に、蒸気タービン１７の低圧タービン２０は、復水器２６を有しており、この復水器２６には冷却水（例えば、海水）を給排する取水管２７及び排水管２８が連結されている。この取水管２７は、循環水ポンプ２９を有し、排水管２８と共に他端部が海中に配置されている。そして、この復水器２６は、冷却水配管３０を介して脱気器３１に連結されており、この冷却水配管３０に復水ポンプ３２及び低圧給水加熱器３３が設けられている。また、脱気器３１は、冷却水配管３４を介して蒸気発生器１３に連結されており、この冷却水配管３４には給水ポンプ３５及び高圧給水加熱器３６が設けられている。 Further, the low-pressure turbine 20 of the steam turbine 17 has a condenser 26, and a condenser pipe 26 and a drain pipe 28 for supplying and discharging cooling water (for example, seawater) are connected to the condenser 26. Yes. This intake pipe 27 has a circulating water pump 29, and the other end portion thereof is disposed in the sea together with the drain pipe 28. The condenser 26 is connected to a deaerator 31 through a cooling water pipe 30, and a condensate pump 32 and a low-pressure feed water heater 33 are provided in the cooling water pipe 30. The deaerator 31 is connected to the steam generator 13 via a cooling water pipe 34, and a water supply pump 35 and a high-pressure feed water heater 36 are provided in the cooling water pipe 34.
　従って、蒸気発生器１３にて、高圧高温の一次冷却水と熱交換を行って生成された蒸気は、冷却水配管１８を通して蒸気タービン１７（高圧タービン１９から低圧タービン２０）に送られ、この蒸気により蒸気タービン１７を駆動して発電機２１により発電を行う。このとき、蒸気発生器１３からの蒸気は、高圧タービン１９を駆動した後、湿分分離加熱器２２で蒸気に含まれる湿分が除去されると共に加熱されてから低圧タービン２０を駆動する。そして、蒸気タービン１７を駆動した蒸気は、復水器２６で海水を用いて冷却されて復水となり、低圧給水加熱器３３で、例えば、低圧タービン２０から抽気した低圧蒸気により加熱され、脱気器３１で溶存酸素や不凝結ガス（アンモニアガス）などの不純物が除去された後、高圧給水加熱器３６で、例えば、高圧タービン１９から抽気した高圧蒸気により加熱された後、蒸気発生器１３に戻される。 Therefore, the steam generated by performing heat exchange with the high-pressure and high-temperature primary cooling water in the steam generator 13 is sent to the steam turbine 17 (from the high-pressure turbine 19 to the low-pressure turbine 20) through the cooling water pipe 18, and this steam is generated. Then, the steam turbine 17 is driven to generate power by the generator 21. At this time, the steam from the steam generator 13 drives the high pressure turbine 19, and then the moisture contained in the steam is removed and heated by the moisture separator / heater 22, and then the low pressure turbine 20 is driven. The steam that has driven the steam turbine 17 is cooled with seawater in the condenser 26 to become condensed water, and is heated by the low-pressure steam extracted from, for example, the low-pressure turbine 20 in the low-pressure feed water heater 33 and deaerated. After impurities such as dissolved oxygen and uncondensed gas (ammonia gas) are removed by the vessel 31, the high pressure feed water heater 36 is heated by, for example, high pressure steam extracted from the high pressure turbine 19, and then the steam generator 13. Returned.
　このように構成された原子力発電プラントに適用される蒸気発生器１３において、図１６に示すように、胴部４１は、密閉された中空円筒形状をなし、上部に対して下部が若干小径となっている。この胴部４１は、上部胴４２と下部胴４３とが溶接により接合されて構成されている。この胴部４１における下部胴４３内には、この下部胴４３の内壁面と所定間隔をもって円筒形状をなす管群外筒４４が配設され、下端部が管板４５の近傍まで延設されている。 In the steam generator 13 applied to the nuclear power plant configured as described above, as shown in FIG. 16, the body portion 41 has a sealed hollow cylindrical shape, and the lower portion has a slightly smaller diameter with respect to the upper portion. ing. The body portion 41 is configured by joining an upper body 42 and a lower body 43 by welding. A tube group outer cylinder 44 having a cylindrical shape with a predetermined distance from the inner wall surface of the lower barrel 43 is disposed in the lower barrel 43 of the trunk portion 41, and a lower end portion extends to the vicinity of the tube plate 45. Yes.
　管群外筒４４内は、内部に所定の高さ位置に対応して複数の管支持板４６が配設されており、管板４５から上方に延設された複数のステーロッド４７により支持されている。そして、この管群外筒４４は、内部に逆Ｕ字形状をなす複数の伝熱管４８からなる伝熱管群４９が配設されており、各伝熱管４８の端部は管板４５に拡管して支持されると共に、中間部が複数の管支持板４６により支持されている。この場合、管支持板４６は、多数の貫通穴（図示略）が形成されており、各伝熱管４８がこの貫通穴内に挿通されて支持されている。 In the tube group outer cylinder 44, a plurality of tube support plates 46 are disposed in correspondence with a predetermined height position, and are supported by a plurality of stay rods 47 extending upward from the tube plate 45. ing. The tube group outer tube 44 is provided therein with a heat transfer tube group 49 including a plurality of heat transfer tubes 48 having an inverted U shape, and an end portion of each heat transfer tube 48 is expanded to the tube plate 45. The intermediate portion is supported by a plurality of tube support plates 46. In this case, the tube support plate 46 has a large number of through holes (not shown), and each heat transfer tube 48 is inserted into and supported by the through holes.
　下部胴４３は、下端部に水室鏡５０が固定されており、内部が隔壁５１により入室５２及び出室５３により区画されると共に、入口ノズル５４及び出口ノズル５５が形成され、各伝熱管４８の一端部が入室５２に連通し、他端部が出室５３に連通している。なお、この入口ノズル５４には上述した冷却水配管１４が連結される一方、出口ノズル５５には冷却水配管１５が連結されている。 The lower body 43 has a water chamber mirror 50 fixed to the lower end thereof, and is divided into an entrance chamber 52 and an exit chamber 53 by a partition wall 51, and an inlet nozzle 54 and an outlet nozzle 55 are formed. One end portion of the first chamber communicates with the entrance chamber 52, and the other end portion communicates with the exit chamber 53. The inlet nozzle 54 is connected to the cooling water pipe 14 described above, while the outlet nozzle 55 is connected to the cooling water pipe 15.
　上部胴４２は、内部に給水を蒸気と熱水とに分離する気水分離器５６と、この分離された蒸気の湿分を除去して乾き蒸気に近い状態とする湿分分離器５７が設けられている。また、上部胴４２は、伝熱管群４９と気水分離器５６との間に、胴部４１内に二次冷却水の給水を行う給水管５８が挿入される一方、天井部には蒸気出口５９が形成されている。そして、胴部４１は、給水管５８からこの胴部４１内に給水された二次冷却水を、胴部４１と管群外筒４４との間を流下して管板４５にて上方に循環し、伝熱管群４９内を上昇するときに各伝熱管４８内を流れる熱水（一次冷却水）との間で熱交換を行う給水路６０が設けられている。なお、給水管５８には上述した冷却水配管３４が連結される一方、蒸気出口５９には冷却水配管１８が連結されている。 The upper body 42 is provided with an air / water separator 56 that separates the feed water into steam and hot water, and a moisture separator 57 that removes the moisture of the separated steam and makes it close to dry steam. It has been. The upper body 42 is provided with a water supply pipe 58 for supplying secondary cooling water into the body 41 between the heat transfer tube group 49 and the steam separator 56, while a steam outlet is provided on the ceiling. 59 is formed. Then, the body 41 circulates the secondary cooling water supplied from the water supply pipe 58 into the body 41 between the body 41 and the tube group outer tube 44 and circulates upward in the tube plate 45. And the water supply path 60 which performs heat exchange between the hot water (primary cooling water) which flows through the inside of each heat exchanger tube 48 when the inside of the heat exchanger tube group 49 rises is provided. The cooling water pipe 34 is connected to the water supply pipe 58, while the cooling water pipe 18 is connected to the steam outlet 59.
　従って、加圧水型原子炉１２で加熱された一次冷却水が冷却水配管１４を通して蒸気発生器１３の入室５２に送られ、多数の伝熱管４８内を通って循環して出室５３に至る。一方、復水器２６で冷却された二次冷却水が冷却水配管３４を通して蒸気発生器１３の給水管５８に送られ、胴部４１内の給水路６０を通って伝熱管４８内を流れる熱水（一次冷却水）と熱交換を行う。即ち、胴部４１内で、高圧高温の一次冷却水と二次冷却水との間で熱交換が行われ、冷やされた一次冷却水は出室５３から冷却水配管１５を通して加圧水型原子炉１２に戻される。一方、高圧高温の一次冷却水と熱交換を行った二次冷却水は、胴部４１内を上昇し、気水分離器５６で蒸気と熱水とに分離され、湿分分離器５７でこの蒸気の湿分を除去してから、冷却水配管１８を通して蒸気タービン１７に送られる。 Therefore, the primary cooling water heated in the pressurized water reactor 12 is sent to the entrance chamber 52 of the steam generator 13 through the coolant pipe 14, circulates through the numerous heat transfer tubes 48, and reaches the exit chamber 53. On the other hand, the secondary cooling water cooled by the condenser 26 is sent to the water supply pipe 58 of the steam generator 13 through the cooling water pipe 34 and flows through the heat transfer pipe 48 through the water supply path 60 in the trunk portion 41. Exchange heat with water (primary cooling water). That is, heat is exchanged between the high-pressure and high-temperature primary cooling water and the secondary cooling water in the trunk portion 41, and the cooled primary cooling water passes from the outlet chamber 53 through the cooling water pipe 15 to the pressurized water reactor 12. Returned to On the other hand, the secondary cooling water subjected to heat exchange with the high-pressure and high-temperature primary cooling water rises in the body 41 and is separated into steam and hot water by the steam-water separator 56, and this is separated by the moisture separator 57. After the moisture of the steam is removed, the steam is sent to the steam turbine 17 through the cooling water pipe 18.
　このように構成された蒸気発生器１３にて、図１に示すように、気水分離器５６には、組立用移動装置６１，６２の取付部６３，６４が設けられている。即ち、この気水分離器５６は、上部胴４２の内壁面に固定される中間デッキプレート７１と、上部胴４２の内壁面に固定されて中間デッキプレート７１の下方に位置する下部デッキプレート７２と、中間デッキプレート７１と下部デッキプレート７２の間に架設される複数のライザ７３と、各ライザ７３内に設けられるスワールベーン７４とを有している。そして、この取付部６３，６４は、中間デッキプレート７１の外周部及び下部デッキプレート７２の外周部に設けられている。 In the steam generator 13 configured as described above, as shown in FIG. 1, the steam / water separator 56 is provided with mounting portions 63 and 64 of the assembly moving devices 61 and 62. That is, the steam / water separator 56 includes an intermediate deck plate 71 fixed to the inner wall surface of the upper body 42, and a lower deck plate 72 fixed to the inner wall surface of the upper body 42 and positioned below the intermediate deck plate 71. The plurality of risers 73 installed between the intermediate deck plate 71 and the lower deck plate 72 and swirl vanes 74 provided in each riser 73 are provided. The mounting portions 63 and 64 are provided on the outer peripheral portion of the intermediate deck plate 71 and the outer peripheral portion of the lower deck plate 72.
　本実施例の蒸気発生器１３を組み立てるとき、管群外筒４４や伝熱管群４９などが収容された下部胴４３を横に倒した状態で支持し、この下部胴４３に対して湿分分離器５７や気水分離器５６などが収容された上部胴４２を所定の接合位置に配置する。このとき、上部胴４２にて、気水分離器５６を湿分分離器５７に接近した位置に予め移動しておき、気水分離器５６と管群外筒４４との間に作業スペースを確保する。そして、作業者は、この作業スペースを用いて内部から上部胴４２と下部胴４３とを溶接により接合するようにしている。 When assembling the steam generator 13 of the present embodiment, the lower barrel 43 in which the tube group outer tube 44, the heat transfer tube group 49, and the like are accommodated is supported in a sideways state, and moisture is separated from the lower barrel 43. The upper body 42 in which the vessel 57, the steam separator 56 and the like are accommodated is disposed at a predetermined joining position. At this time, the steam separator 56 is moved to a position close to the moisture separator 57 in the upper body 42 in advance, and a work space is secured between the steam separator 56 and the tube group outer tube 44. To do. Then, the worker uses the work space to join the upper body 42 and the lower body 43 from the inside by welding.
　以下、組立用移動装置（以下、移動装置と称する。）６１，６２などについて詳細に説明する。図１乃至図５に示すように、上部胴４２を、図示しないクレーンにより下部胴４３との接合位置に移動するとき、気水分離器５６は、上部胴４２における湿分分離器５７に接近した位置に配置され、中間デッキプレート７１の外周部が複数の仮押え部材１０１により上部胴４２の内壁面に位置決めされている。上部胴４２が下部胴４３との接合位置に載置されると、２つの移動装置６１は、上部胴４２の内壁面に配置され、中間デッキプレート７１の下部を支持する位置に装着される。 Hereinafter, the assembly moving device (hereinafter referred to as the moving device) 61, 62 and the like will be described in detail. As shown in FIGS. 1 to 5, when the upper trunk 42 is moved to the joining position with the lower trunk 43 by a crane (not shown), the steam separator 56 approaches the moisture separator 57 in the upper trunk 42. The outer peripheral portion of the intermediate deck plate 71 is positioned on the inner wall surface of the upper trunk 42 by a plurality of temporary pressing members 101. When the upper body 42 is placed at the joining position with the lower body 43, the two moving devices 61 are disposed on the inner wall surface of the upper body 42 and are mounted at positions that support the lower part of the intermediate deck plate 71.
　この移動装置６１は、気水分離器５６の取付部６３に対して着脱自在な架台１０２と、この架台１０２を介して気水分離器５６を昇降自在な手動ジャッキ（昇降装置）１０３と、架台１０２に対して着脱自在なチルタンク（台車）１０４と、架台１０２に対してチルタンク１０４の走行方向を転換する転換装置１０５とから構成されている。 The moving device 61 includes a pedestal 102 that can be attached to and detached from the mounting portion 63 of the steam / water separator 56, a manual jack (lifting / lowering device) 103 that can lift and lower the steam / water separator 56 via the gantry 102, and a gantry. A chill tank (cart) 104 that is detachable with respect to 102, and a conversion device 105 that changes the traveling direction of the chill tank 104 with respect to the gantry 102.
　即ち、中間デッキプレート７１は、外周部であって横倒ししたときの下端部における周方向の所定の位置（２箇所）に、サポートプレート１１１が溶接により固定されており、このサポートプレート１１１に複数の取付用ねじ穴１１１ａが形成されている。この場合、サポートプレート１１１及び各取付用ねじ穴１１１ａが取付部６３として機能する。 That is, the intermediate deck plate 71 is fixed to the support plate 111 by welding at predetermined positions (two locations) in the circumferential direction at the lower end when the intermediate deck plate 71 is laid down. A mounting screw hole 111a is formed. In this case, the support plate 111 and each mounting screw hole 111 a function as the mounting portion 63.
　取付プレート１１２は、サポートプレート１１１に密着し、複数のボルト１１３が各取付用ねじ穴１１１ａに螺合することでサポートプレート１１１に固定されている。支持プレート１１４は、取付プレート１１２及びサポートプレート１１１に密着し、複数のボルト１１５により取付プレート１１２及びサポートプレート１１１に固定されている。この支持プレート１１４は、中央部に支持壁１１６が一体に形成されると共に、その下部に水平壁１１７が一体に形成されている。また、取付プレート１１２は、側方に延出した位置に昇降座１１８が固定されており、この昇降座１１８の下方に位置する上部胴４２の内壁面に手動ジャッキ１０３が設置されている。 The mounting plate 112 is in close contact with the support plate 111, and a plurality of bolts 113 are fixed to the support plate 111 by screwing into the mounting screw holes 111a. The support plate 114 is in close contact with the mounting plate 112 and the support plate 111 and is fixed to the mounting plate 112 and the support plate 111 with a plurality of bolts 115. The support plate 114 is integrally formed with a support wall 116 at the center and a horizontal wall 117 at the bottom. Further, the mounting plate 112 has a lifting / lowering seat 118 fixed to a position extending sideways, and a manual jack 103 is installed on the inner wall surface of the upper body 42 positioned below the lifting / lowering seat 118.
　支持プレート１１４は、水平壁１１７にチルタンク１０４の取付プレート１１９が密着し、複数のボルト（逆転防止部材）１２０により着脱自在に固定されている。このチルタンク１０４は、複数の車輪１２１に掛け回されるように無端の駆動ベルト１２２が設けられ、上部胴４２の内壁面上を走行可能となっている。また、支持プレート１１４は、水平壁１１７の上面部に軸受部１２３が固定され、チルタンク１０４の取付プレート１１９から上方に延出する支持ロット１２４がこの軸受部１２３に回動自在に支持され、この支持ロッド１２４の上端部にハンドル１２５が装着されている。 The mounting plate 119 of the chill tank 104 is in close contact with the horizontal wall 117 and the support plate 114 is detachably fixed by a plurality of bolts (reverse rotation prevention members) 120. The chill tank 104 is provided with an endless drive belt 122 so as to be hung around a plurality of wheels 121, and can run on the inner wall surface of the upper trunk 42. The support plate 114 has a bearing 123 fixed to the upper surface of the horizontal wall 117, and a support lot 124 extending upward from the mounting plate 119 of the chill tank 104 is rotatably supported by the bearing 123. A handle 125 is attached to the upper end of the support rod 124.
　この場合、取付プレート１１２、支持プレート１１４（支持壁１１６、水平壁１１７）、昇降座１１８などにより架台１０２が構成される。また、軸受部１２３、支持ロット１２４、ハンドル１２５により転換装置１０５が構成される。 In this case, the gantry 102 is constituted by the mounting plate 112, the support plate 114 (support wall 116, horizontal wall 117), the lifting seat 118, and the like. Further, the conversion device 105 is constituted by the bearing portion 123, the support lot 124, and the handle 125.
　従って、中間デッキプレート７１は、予め、複数の取付用ねじ穴１１１ａを有するサポートプレート１１１が固定されることで、取付部６３が設けられており、サポートプレート１１１に架台１０２を構成する取付プレート１１２を密着し、複数のボルト１１３により固定することができる。そして、複数の仮押え部材１０１を緩めて上部胴４２における中間デッキプレート７１の平面方向、つまり、図２にて上下方向の位置決めを解除し、手動ジャッキ１０３を伸張することで、架台１０２を介して中間デッキプレート７１を上昇させることができる。この状態で、チルタンク１０４を架台１０２の下方に配置し、支持ロッド１２４を軸受部１２３に挿入しながら架台１０２を構成する支持プレート１１４の水平壁１１７にチルタンク１０４の取付プレート１１９を密着させ、複数のボルト１２０により固定することで、チルタンク１０４を装着することができる。なお、手動ジャッキ１０３により中間デッキプレート７１を上昇させ、且つ、複数のボルト１２０を緩めた状態で、ハンドル１２５を９０度回動させることで、チルタンク１０４の走行方向を９０度転換することができる。 Therefore, the intermediate deck plate 71 is provided with a mounting portion 63 by fixing the support plate 111 having a plurality of mounting screw holes 111 a in advance, and the mounting plate 112 that constitutes the gantry 102 on the support plate 111. Can be fixed by a plurality of bolts 113. Then, the plurality of temporary holding members 101 are loosened to release the positioning in the plane direction of the intermediate deck plate 71 in the upper trunk 42, that is, the vertical direction in FIG. 2, and the manual jack 103 is extended to extend the frame 102. Thus, the intermediate deck plate 71 can be raised. In this state, the chill tank 104 is arranged below the gantry 102, and the mounting plate 119 of the chill tank 104 is brought into close contact with the horizontal wall 117 of the support plate 114 constituting the gantry 102 while inserting the support rod 124 into the bearing portion 123. The chill tank 104 can be mounted by fixing with the bolt 120 of the above. The traveling direction of the chill tank 104 can be changed by 90 degrees by rotating the handle 125 by 90 degrees while the intermediate deck plate 71 is raised by the manual jack 103 and the plurality of bolts 120 are loosened. .
　また、図１、図６乃至図９に示すように、上部胴４２を、図示しないクレーンにより下部胴４３との接合位置に移動するとき、気水分離器５６は、上部胴４２における湿分分離器５７に接近した位置に配置され、上述した中間デッキプレート７１だけでなく、下部デッキプレート７２の外周部が複数の仮押え部材１３１により上部胴４２の内壁面に位置決めされている。上部胴４２が下部胴４３との接合位置に載置されると、２つの移動装置６２は、上部胴４２の内壁面に配置され、下部デッキプレート７２の下部を支持する位置に装着される。 As shown in FIGS. 1 and 6 to 9, when the upper trunk 42 is moved to a joining position with the lower trunk 43 by a crane (not shown), the steam separator 56 separates moisture in the upper trunk 42. The outer peripheral portion of the lower deck plate 72 as well as the intermediate deck plate 71 described above is positioned on the inner wall surface of the upper body 42 by a plurality of temporary pressing members 131. When the upper body 42 is placed at the joining position with the lower body 43, the two moving devices 62 are disposed on the inner wall surface of the upper body 42 and are mounted at positions that support the lower portion of the lower deck plate 72.
　この移動装置６２は、気水分離器５６の取付部６４に対して着脱自在な架台１３２と、この架台１３２を介して気水分離器５６を昇降自在な手動ジャッキ（昇降装置）１３３と、架台１３２に対して着脱自在なチルタンク（台車）１３４と、架台１３２に対してチルタンク１３４の走行方向を転換する転換装置１３５とから構成されている。 The moving device 62 includes a pedestal 132 detachably attached to the mounting portion 64 of the steam / water separator 56, a manual jack (lifting / lowering device) 133 that can lift and lower the steam / water separator 56 via the pedestal 132, and a cradle. A chill tank (cart) 134 that is detachable with respect to 132 and a conversion device 135 that changes the traveling direction of the chill tank 134 with respect to the gantry 132 are configured.
　即ち、下部デッキプレート７２は、外周部であって横倒ししたときの下端部における周方向の所定の位置（２箇所）に、サポートプレート１４１が溶接により固定されており、このサポートプレート１４１に複数の取付用ねじ穴１４１ａが形成されている。この場合、サポートプレート１４１及び各取付用ねじ穴１４１ａが取付部６４として機能する。 That is, the lower deck plate 72 is fixed to the support plate 141 by welding at predetermined positions (two locations) in the circumferential direction at the lower end when the lower deck plate 72 is laid down. A mounting screw hole 141a is formed. In this case, the support plate 141 and each mounting screw hole 141 a function as the mounting portion 64.
　支持プレート１４２は、サポートプレート１４１に密着し、複数のボルト１４３が各取付用ねじ穴１４１ａに螺合することでサポートプレート１４１に固定されている。この支持プレート１４２は、中央部に支持壁１４４が一体に形成されると共に、その下部に水平壁１４５が一体に形成されている。そして、この支持プレート１４２は、水平壁１４５の下面に第１連結ブラケット１４６が複数のボルト１４７により固定され、この第１連結ブラケット１４６の下面に第２連結ブラケット１４８が複数のボルト１４９により固定されている。この第１連結ブラケット１４６は、側方に延出した位置に昇降座１５０が固定されており、この昇降座１５０の下方に位置する上部胴４２の内壁面に手動ジャッキ１３３が設置されている。 The support plate 142 is fixed to the support plate 141 by being in close contact with the support plate 141 and screwing a plurality of bolts 143 into the mounting screw holes 141a. The support plate 142 is integrally formed with a support wall 144 at a central portion thereof, and a horizontal wall 145 is integrally formed at a lower portion thereof. The support plate 142 has a first connection bracket 146 fixed to the lower surface of the horizontal wall 145 by a plurality of bolts 147, and a second connection bracket 148 fixed to the lower surface of the first connection bracket 146 by a plurality of bolts 149. ing. The first connecting bracket 146 has a lifting / lowering seat 150 fixed to a position extending laterally, and a manual jack 133 is installed on the inner wall surface of the upper body 42 positioned below the lifting / lowering seat 150.
　第２連結ブラケット１４８は、下部にチルタンク１３４の取付プレート１５１が密着し、複数のボルト（逆転防止部材）１５２により着脱自在に固定されている。このチルタンク１３４は、複数の車輪１５３に掛け回されるように無端の駆動ベルト１５４が設けられ、上部胴４２の内壁面上を走行可能となっている。また、第２連結ブラケット１４８は、下部に軸受部１５５が固定され、チルタンク１３４の取付プレート１５１から上方に延出する支持ロット１５６がこの軸受部１５５に回動自在に支持され、この支持ロッド１５６の上端部にハンドル１５７が装着されている。 The second connection bracket 148 has a mounting plate 151 of the chill tank 134 in close contact with the lower portion, and is detachably fixed by a plurality of bolts (reverse rotation prevention members) 152. The chill tank 134 is provided with an endless drive belt 154 so as to be hung around a plurality of wheels 153, and can travel on the inner wall surface of the upper body 42. The second connecting bracket 148 has a bearing portion 155 fixed to the lower portion thereof, and a support lot 156 extending upward from the mounting plate 151 of the chill tank 134 is rotatably supported by the bearing portion 155. The support rod 156 A handle 157 is attached to the upper end of the.
　この場合、支持プレート１４２（支持壁１４４、水平壁１４５）、第１連結ブラケット１４６、第２連結ブラケット１４８、昇降座１５０などにより架台１３２が構成される。また、軸受部１５５、支持ロット１５６、ハンドル１５７により転換装置１３５が構成される。 In this case, the pedestal 132 is constituted by the support plate 142 (support wall 144, horizontal wall 145), the first connection bracket 146, the second connection bracket 148, the lifting seat 150, and the like. Further, the conversion unit 135 is configured by the bearing portion 155, the support lot 156, and the handle 157.
　従って、下部デッキプレート７２は、予め、複数の取付用ねじ穴１４１ａを有するサポートプレート１４１が固定されることで、取付部６４が設けられており、サポートプレート１４１に架台１３２を構成する支持プレート１４２を密着し、複数のボルト１４３により固定することができる。そして、複数の仮押え部材１３１を緩めて上部胴４２における下部デッキプレート７２の平面方向、つまり、図６にて上下方向の位置決めを解除し、手動ジャッキ１３３を伸張することで、架台１３２を介して下部デッキプレート７２を上昇させることができる。この状態で、チルタンク１３４を架台１３２の下方に配置し、支持ロッド１５６を軸受部１５５に挿入しながら架台１３２を構成する第２連結ブラケット１４８の下部にチルタンク１３４の取付プレート１５１を密着させ、複数のボルト１５２により固定することで、チルタンク１３４を装着することができる。なお、手動ジャッキ１３３により下部デッキプレート７２を上昇させ、且つ、複数のボルト１５２を緩めた状態で、ハンドル１５７を９０度回動させることで、チルタンク１３４の走行方向を９０度転換することができる。 Accordingly, the lower deck plate 72 is provided with the mounting portion 64 by fixing the support plate 141 having a plurality of mounting screw holes 141 a in advance, and the support plate 142 constituting the mount 132 on the support plate 141. Can be fixed with a plurality of bolts 143. Then, the plurality of temporary pressing members 131 are loosened to release the positioning in the plane direction of the lower deck plate 72 in the upper trunk 42, that is, the vertical direction in FIG. 6, and the manual jack 133 is extended to extend through the gantry 132. Thus, the lower deck plate 72 can be raised. In this state, the chill tank 134 is disposed below the pedestal 132, and the mounting plate 151 of the chill tank 134 is brought into close contact with the lower portion of the second connection bracket 148 constituting the pedestal 132 while the support rod 156 is inserted into the bearing portion 155. The chill tank 134 can be mounted by fixing with the bolt 152. The traveling direction of the chill tank 134 can be changed by 90 degrees by rotating the handle 157 by 90 degrees while the lower deck plate 72 is raised by the manual jack 133 and the plurality of bolts 152 are loosened. .
　ここで、上述した蒸気発生器１３の組立方法について、詳細に説明する。 Here, the assembly method of the steam generator 13 described above will be described in detail.
　本実施例の蒸気発生器の組立方法は、図１に示すように、内部に管群外筒４４及び伝熱管群４９が収容されて横倒しに支持された下部胴４３に対して内部に湿分分離器５７に気水分離器５６が接近した位置に収容された上部胴４２を所定の接合位置に配置する胴部配置工程と、内部から上部胴４２と下部胴４３とを溶接により接合する胴部接合工程と、気水分離器５６を湿分分離器５７から離間して管群外筒４４の上端部に密着する位置に移動する気水分離器移動工程と、管群外筒４４の上端部に気水分離器５６を溶接により接合する気水分離器接合工程と、を有している。 As shown in FIG. 1, the steam generator assembling method of the present embodiment has a moisture content inside the lower barrel 43 in which the tube group outer tube 44 and the heat transfer tube group 49 are accommodated and supported sideways. A barrel arrangement step for arranging the upper barrel 42 accommodated in a position where the steam separator 56 is close to the separator 57 at a predetermined joining position, and a barrel for joining the upper barrel 42 and the lower barrel 43 from inside by welding. A partial joining step, a steam / water separator moving step for moving the steam / water separator 56 away from the moisture separator 57 to a position in close contact with the upper end of the tube group outer tube 44, and an upper end of the tube group outer tube 44 A steam-water separator joining step for joining the steam-water separator 56 to the part by welding.
　また、本実施例の蒸気発生器の組立方法にて、気水分離器移動工程は、気水分離器５６を移動装置に搭載する搭載工程と、移動装置により気水分離器５６の周方向位置の調整を行う位置調整工程と、移動装置を方向転換してから気水分離器５６を管群外筒４４の上端部側に移動する移動工程と、を有している。 Further, in the steam generator assembling method of this embodiment, the steam-water separator moving step includes a mounting step of mounting the steam-water separator 56 on the moving device, and a circumferential position of the steam-water separator 56 by the moving device. And a moving step of moving the steam / water separator 56 to the upper end side of the tube group outer cylinder 44 after changing the direction of the moving device.
　以下、図１４のフローチャートに基づいて説明する。本実施例の蒸気発生器の組立方法において、図１４に示すように、まず、ステップＳ１１にて、内部に管群外筒４４及び伝熱管群４９を収容した下部胴４３を横倒しとして図示しない架台に支持する。続いて、ステップＳ１２にて、内部に湿分分離器５７及び気水分離器５６を収容した上部胴４２を横倒しとして図示しない架台に支持する。このとき、図１に示すように、上部胴４２は、気水分離器５６を正規の固定位置よりも湿分分離器５７に接近した位置に配置して仮固定し、下端部が下部胴４３の上端部に密着した所定の接合位置に配置する。 Hereinafter, description will be made based on the flowchart of FIG. In the steam generator assembling method of the present embodiment, as shown in FIG. 14, first, in step S11, a lower trunk 43 that accommodates the tube group outer tube 44 and the heat transfer tube group 49 is laid sideways and a gantry not shown in the figure. To support. Subsequently, in step S12, the upper body 42 in which the moisture separator 57 and the steam separator 56 are housed is laid down and supported on a gantry (not shown). At this time, as shown in FIG. 1, the upper body 42 is temporarily fixed by disposing the steam / water separator 56 at a position closer to the moisture separator 57 than the regular fixing position, and the lower end part is the lower body 43. It arrange | positions in the predetermined | prescribed joining position closely_contact | adhered to the upper end part.
　この状態で、ステップＳ１３にて、胴部４１の内部から図示しない溶接装置を用いて上部胴４２と下部胴４３とを溶接により接合する。この場合、気水分離器５６が湿分分離器５７に接近した位置に配置されていることから、気水分離器５６と管群外筒４４との間、つまり、上部胴４２と下部胴４３との接合位置Ａの内方側に作業スペースが確保されており、作業者は、この作業スペースを用いて溶接作業を行うことができる。 In this state, in step S13, the upper body 42 and the lower body 43 are joined from the inside of the body portion 41 by welding using a welding device (not shown). In this case, since the steam / water separator 56 is disposed at a position close to the moisture separator 57, the steam / separator 56 and the tube group outer cylinder 44, that is, the upper trunk 42 and the lower trunk 43. A work space is secured on the inner side of the joining position A, and the worker can perform welding work using this work space.
　上部胴４２と下部胴４３との溶接作業が完了すると、ステップＳ１４にて、図６に示すように、気水分離器５６における下部デッキプレート７２の下部に２つの吊りピース１６１を固定する。ステップＳ１５にて、図１０に示すように、２つの吊りピース１６１に対して、チェーン１６２及びレバーブロック（登録商標）（トルクレンチ）１６３をそれぞれ装着する。即ち、気水分離器５６は、下部デッキプレート７２に補強用のフランジ７２ａが設けられており、このフランジ７２ａの端部に吊りピース１６１を溶接やボルトにより固定する。一方、管群外筒４４は、その内側に支持ピース１６４を溶接やボルトにより固定する。チェーン１６２は、一端部を吊りピース１６１に係止し、他端部を支持ピース１６４に係合する。レバーブロック１６３は、支持ピース１６４の近傍に装着し、チェーン１６２の他端部を連結する。 When the welding operation of the upper body 42 and the lower body 43 is completed, the two suspension pieces 161 are fixed to the lower part of the lower deck plate 72 in the steam / water separator 56 in step S14 as shown in FIG. In step S15, as shown in FIG. 10, the chain 162 and the lever block (registered trademark) (torque wrench) 163 are mounted on the two suspension pieces 161, respectively. That is, the steam separator 56 is provided with a reinforcing flange 72a on the lower deck plate 72, and the suspension piece 161 is fixed to the end of the flange 72a by welding or bolts. On the other hand, the tube group outer tube 44 fixes the support piece 164 to the inside thereof by welding or bolts. The chain 162 has one end locked to the suspension piece 161 and the other end engaged with the support piece 164. The lever block 163 is mounted in the vicinity of the support piece 164 and connects the other end of the chain 162.
　一方、ステップＳ１６にて、中間デッキプレート７１側にて、予め固定されたサポートプレート１１１に対して架台１０２を固定すると共に、この架台１０２に対応して手動ジャッキ１０３を配置する。また、下部デッキプレート７２側にて、予め固定されたサポートプレート１４１に対して架台１３２を固定すると共に、この架台１３２に対応して手動ジャッキ１３３を配置する。そして、ステップＳ１７にて、手動ジャッキ１０３を伸張して架台１０２を介して中間デッキプレート７１を上昇させた状態とし、チルタンク１０４を架台１０２の下部に装着した後、手動ジャッキ１０３を収縮して中間デッキプレート７１を下降させ、チルタンク１０４を上部胴４２の内壁面に設置する。また、手動ジャッキ１３３を伸張して架台１３２を介して下部デッキプレート７２を上昇させた状態とし、チルタンク１３４を架台１３２の下部に装着した後、手動ジャッキ１３３を収縮して下部デッキプレート７２を下降させ、チルタンク１３４を上部胴４２の内壁面に設置する。 On the other hand, in step S16, on the intermediate deck plate 71 side, the gantry 102 is fixed to the support plate 111 fixed in advance, and the manual jack 103 is arranged corresponding to the gantry 102. Further, on the lower deck plate 72 side, the pedestal 132 is fixed to a support plate 141 fixed in advance, and a manual jack 133 is disposed corresponding to the pedestal 132. In step S17, the manual jack 103 is extended to raise the intermediate deck plate 71 via the gantry 102, the chill tank 104 is attached to the lower part of the gantry 102, and then the manual jack 103 is contracted to the middle. The deck plate 71 is lowered, and the chill tank 104 is installed on the inner wall surface of the upper trunk 42. Further, the manual jack 133 is extended so that the lower deck plate 72 is raised through the pedestal 132, the chill tank 134 is attached to the lower part of the pedestal 132, the manual jack 133 is contracted, and the lower deck plate 72 is lowered. The chill tank 134 is installed on the inner wall surface of the upper trunk 42.
　ステップＳ１８では、気水分離器５６の周方向の調整を行う。各架台１０２，１３２の下部に装着されたチルタンク１０４，１３４は、走行可能方向が上部胴４２の周方向である。そのため、移動装置６１，６２により気水分離器５６を単独で上部胴４２の周方向に移動することで、上部胴４２に対してこの気水分離器５６の周方向位置を調整する。気水分離器５６の周方向調整が完了したら、ステップＳ１９にて、チルタンク１０４，１３４の方向転換を行う。即ち、手動ジャッキ１０３，１３３により各デッキプレート７１，７２を上昇させ、複数のボルト１２０，１５２を緩め、ハンドル１２５，１５７を９０度回動することで、チルタンク１０４，１３４を９０度回動し、走行可能方向を上部胴４２の軸方向に転換する。 In step S18, the circumferential direction of the steam separator 56 is adjusted. In the chill tanks 104 and 134 mounted on the lower portions of the mounts 102 and 132, the travelable direction is the circumferential direction of the upper trunk 42. Therefore, the position of the steam separator 56 in the circumferential direction is adjusted with respect to the upper trunk 42 by moving the steam separator 56 alone in the circumferential direction of the upper trunk 42 by the moving devices 61 and 62. When the circumferential direction adjustment of the steam separator 56 is completed, the direction of the chill tanks 104 and 134 is changed in step S19. That is, the deck jacks 71 and 72 are raised by the manual jacks 103 and 133, the plurality of bolts 120 and 152 are loosened, and the handles 125 and 157 are rotated 90 degrees, so that the chill tanks 104 and 134 are rotated 90 degrees. The travelable direction is changed to the axial direction of the upper trunk 42.
　ステップＳ２０にて、レバーブロック１６３を用いて気水分離器５６を湿分分離器５７から離間して管群外筒４４の上端部に密着する位置に移動する。即ち、図１０に示すように、２人の作業者（図示では、１人）は、それぞれレバーブロック１６３を同時に操作し、各チェーン１６２を牽引して巻き取ることで、気水分離器５６を管群外筒４４側に移動する。このとき、各仮押え部材１０１，１３１を緩めて上部胴４２における各デッキプレート７１，７２の軸方向、つまり、図１にて左右方向の位置決めを解除しておく。 In step S20, the steam / water separator 56 is moved away from the moisture separator 57 using the lever block 163 and moved to a position where it is in close contact with the upper end of the tube group outer tube 44. That is, as shown in FIG. 10, two workers (one person in the figure) operate the lever block 163 at the same time and pull the chain 162 to wind up the air / water separator 56. It moves to the tube group outer tube 44 side. At this time, the temporary holding members 101 and 131 are loosened to release the positioning of the deck plates 71 and 72 in the upper body 42 in the axial direction, that is, in the horizontal direction in FIG.
　そして、図１１に示すように、気水分離器５６の下端部が管群外筒４４の上端部に接触したら、レバーブロック１６３の操作による気水分離器５６の移動を終了する。ステップＳ２１では、管群外筒４４に対して気水分離器５６の位置が高さ方向にずれていたときには、手動ジャッキ１０３，１３３を用いて気水分離器５６を昇降し、両者の位置合わせを行う。 Then, as shown in FIG. 11, when the lower end portion of the steam / water separator 56 comes into contact with the upper end portion of the tube group outer tube 44, the movement of the steam / water separator 56 by the operation of the lever block 163 is finished. In step S21, when the position of the steam / water separator 56 is shifted in the height direction with respect to the tube group outer tube 44, the steam / water separator 56 is moved up and down using the manual jacks 103 and 133, and the both are aligned. I do.
　そして、ステップＳ２２にて、図１２に示すように、気水分離器５６における下部デッキプレート７２が管群外筒４４の上端部に当接した状態で、その内側を溶接Ｂする。このとき、気水分離器５６は、図１３に示すように、その外周部が支持部材１７１，１７２などにより胴部４１の内壁面に支持される。また、気水分離器５６と湿分分離器５７とを配管７５などにより連結する。従って、気水分離器５６が胴部４１内の正規に位置に固定される。 Then, in step S22, as shown in FIG. 12, the inner side of the lower deck plate 72 in the steam / water separator 56 is welded B while being in contact with the upper end of the tube group outer cylinder 44. At this time, as shown in FIG. 13, the outer peripheral portion of the steam / water separator 56 is supported on the inner wall surface of the trunk portion 41 by the support members 171, 172 and the like. Further, the steam separator 56 and the moisture separator 57 are connected by a pipe 75 or the like. Therefore, the steam / water separator 56 is fixed at a regular position in the body portion 41.
　その後、ステップＳ２３にて、架台１０２，１３２、手動ジャッキ１０３，１３３、チルタンク１０４，１３４、吊りピース１６１、チェーン１６２、レバーブロック１６３、支持ピース１６４などを取り外す。これにより蒸気発生器１３の組立作業が完了する。 Thereafter, in step S23, the pedestals 102 and 132, the manual jacks 103 and 133, the chill tanks 104 and 134, the suspension piece 161, the chain 162, the lever block 163, the support piece 164, and the like are removed. Thereby, the assembly work of the steam generator 13 is completed.
　このように本実施例の蒸気発生器の組立方法にあっては、上部胴４２と下部胴４３が接合されてなる胴部４１と、胴部４１内に配設される伝熱管群４９と、上部胴４２内で伝熱管群４９の上方に配設される気水分離器５６及び湿分分離器５７とを設けて構成し、気水分離器５６に組立用移動装置６１，６２の取付部６３，６４を設けている。 As described above, in the method of assembling the steam generator according to the present embodiment, the body 41 formed by joining the upper body 42 and the lower body 43, the heat transfer tube group 49 disposed in the body 41, An air / water separator 56 and a moisture separator 57 disposed above the heat transfer tube group 49 are provided in the upper body 42, and mounting portions for the assembly moving devices 61 and 62 are provided in the air / water separator 56. 63 and 64 are provided.
　従って、蒸気発生器１３の組立時に、気水分離器５６に取付部６３，６４を介して容易に組立用移動装置６１，６２を装着することができ、予め、気水分離器５６を湿分分離器５７に接近した側に配置することで、内部に上部胴４２と下部胴４３とを接合するための作業空間を確保することができ、その後、組立用移動装置６１，６２により気水分離器５６を所定の位置に移動することで、適正に固定することができ、蒸気発生器１３の組立作業における作業性を向上することができる。 Therefore, when the steam generator 13 is assembled, the assembly moving devices 61 and 62 can be easily attached to the steam / water separator 56 via the mounting portions 63 and 64, and the steam / water separator 56 is previously placed in the moisture state. By disposing it on the side closer to the separator 57, a working space for joining the upper barrel 42 and the lower barrel 43 can be secured inside, and then the air and water are separated by the assembling moving devices 61 and 62. By moving the vessel 56 to a predetermined position, it can be properly fixed, and the workability in the assembly work of the steam generator 13 can be improved.
　また、本実施例の蒸気発生器では、気水分離器５６を、中間デッキプレート７１と、下部デッキプレート７２と、各デッキプレート７１，７２の間に架設されるライザ７３と、各ライザ７３内に設けられるスワールベーン７４とで構成し、取付部６３，６４を各デッキプレート７１，７２に設けている。従って、中間デッキプレート７１と下部デッキプレート７２に各取付部６３，６４を介して組立用移動装置６１，６２をそれぞれ装着することが可能となり、この組立用移動装置６１，６２により気水分離器５６を安定して移動することができる。 In the steam generator of the present embodiment, the steam separator 56 is provided with an intermediate deck plate 71, a lower deck plate 72, risers 73 installed between the deck plates 71, 72, The mounting portions 63 and 64 are provided on the deck plates 71 and 72, respectively. Therefore, the assembly moving devices 61 and 62 can be mounted on the intermediate deck plate 71 and the lower deck plate 72 via the mounting portions 63 and 64, respectively. 56 can be moved stably.
　また、本実施例の蒸気発生器にあっては、内部に管群外筒４４及び伝熱管群４９が収容されて横倒しに支持された下部胴４３に対して内部に湿分分離器５７に気水分離器５６が接近した位置に収容された上部胴４２を所定の接合位置に配置する胴部配置工程と、内部から上部胴４２と下部胴４３とを溶接により接合する胴部接合工程と、気水分離器５６を湿分分離器５７から離間して管群外筒４４の上端部に密着する位置に移動する気水分離器移動工程と、管群外筒４４の上端部に気水分離器５６を溶接により接合する気水分離器接合工程とを設けている。 Further, in the steam generator of this embodiment, the moisture separator 57 is evacuated to the inside of the lower barrel 43 in which the tube group outer tube 44 and the heat transfer tube group 49 are accommodated and supported sideways. A trunk arrangement step of arranging the upper trunk 42 accommodated in a position close to the water separator 56 at a predetermined joining position, and a trunk joining step of joining the upper trunk 42 and the lower trunk 43 from the inside by welding; A steam / water separator moving step of moving the steam / water separator 56 away from the moisture separator 57 to a position in close contact with the upper end of the tube group outer tube 44, and a steam / water separation at the upper end of the tube group outer tube 44. And a steam / water separator joining step for joining the vessel 56 by welding.
　従って、予め、気水分離器５６を湿分分離器５７に接近した位置に収容することで、内部に上部胴４２と下部胴４３とを溶接により接合するための作業空間を確保することができ、その後、気水分離器５６を管群外筒４４の上端部に密着する位置に移動して接合することができ、蒸気発生器１３の組立作業における作業性を向上することができる。 Therefore, by storing the steam separator 56 in a position close to the moisture separator 57 in advance, it is possible to secure a working space for joining the upper barrel 42 and the lower barrel 43 by welding. Then, the steam / water separator 56 can be moved and joined to a position in close contact with the upper end portion of the tube group outer cylinder 44, and the workability in the assembly operation of the steam generator 13 can be improved.
　本実施例の蒸気発生器の組立方法では、気水分離器移動工程として、気水分離器５６を移動装置６１，６２に搭載する搭載工程と、移動装置６１，６２により気水分離器５６の周方向位置の調整を行う位置調整工程と、移動装置６１，６２を方向転換してから気水分離器５６を管群外筒４４の上端部側に移動する移動工程とを設けている。従って、移動装置６１，６２により気水分離器５６を管群外筒４４の上端部側に移動する前に、この移動装置６１，６２により気水分離器５６の周方向位置の調整を行うことができ、気水分離器５６の高精度な装着を可能とすることができる。 In the steam generator assembling method of the present embodiment, as the steam / water separator moving process, the mounting process of mounting the steam / water separator 56 on the moving devices 61 and 62 and the moving device 61 and 62 of the steam / water separator 56 are performed. A position adjusting process for adjusting the circumferential position and a moving process for moving the steam-water separator 56 to the upper end side of the tube group outer cylinder 44 after changing the direction of the moving devices 61 and 62 are provided. Therefore, before moving the steam / water separator 56 to the upper end side of the tube group outer cylinder 44 by the moving devices 61 and 62, the circumferential position of the steam / water separator 56 is adjusted by the moving devices 61 and 62. It is possible to mount the steam separator 56 with high accuracy.
　また、本実施例の気水分離器の移動装置にあっては、気水分離器５６の前後に着脱自在な架台１０２，１３２と、架台１０２，１３２を介して気水分離器５６を昇降自在な手動ジャッキ１０３，１３３と、架台１０２，１３２に着脱自在なチルタンク１０４，１３４と、架台１０２，１３２に対してチルタンク１０４，１３４の走行方向を転換する転換装置１０５，１３５とを設けている。 Further, in the moving device for the steam separator of the present embodiment, the gantry 102 and 132 detachably attached to the front and rear of the steam and water separator 56, and the steam and water separator 56 can be moved up and down via the gantry 102 and 132. Manual jacks 103 and 133, chill tanks 104 and 134 that are detachable from the bases 102 and 132, and conversion devices 105 and 135 that change the traveling direction of the chill tanks 104 and 134 with respect to the bases 102 and 132.
　従って、上部胴４２と下部胴４３を接合するとき、移動装置６１，６２により気水分離器５６を管群外筒４４の上端部側に移動する前に、この移動装置６１，６２により気水分離器５６の周方向位置の調整を行うことができ、気水分離器５６の高精度な装着を可能とすることができる。 Accordingly, when the upper body 42 and the lower body 43 are joined, before the steam separator 56 is moved to the upper end side of the tube group outer tube 44 by the moving devices 61 and 62, The circumferential position of the separator 56 can be adjusted, and the air / water separator 56 can be mounted with high accuracy.
　なお、上述した実施例では、取付部６３，６４を各デッキプレート７１，７２に固定されるサポートプレート１１１，１４１（各取付用ねじ穴１１１ａ，１４１ａ）としたが、この構成に限定されるものではない。例えば、サポートプレート１１１，１４１をなくして各デッキプレート７１，７２に直接各取付用ねじ穴１１１ａ，１４１ａを形成してもよい。また、取付用ねじ穴１１１ａ，１４１ａに限らず、ボルトの貫通穴、スタッドボルト、取付フランジなどであってもよい。 In the above-described embodiment, the mounting portions 63 and 64 are the support plates 111 and 141 (respective mounting screw holes 111a and 141a) fixed to the deck plates 71 and 72. However, the present invention is limited to this configuration. is not. For example, the mounting screw holes 111a and 141a may be formed directly on the deck plates 71 and 72 without the support plates 111 and 141, respectively. Further, not only the mounting screw holes 111a and 141a but also bolt through holes, stud bolts, mounting flanges, and the like may be used.
　本発明に係る蒸気発生器、蒸気発生器の組立方法、気水分離器の移動装置は、上部胴と下部胴とを接合するときに気水分離器を移動しておくことで作業スペースを確保し、組立作業の作業性の向上を可能とするものであり、いずれの発電プラントにも適用することができる。 The steam generator, the steam generator assembling method, and the steam / water separator moving device according to the present invention secure a work space by moving the steam / water separator when joining the upper and lower shells. In addition, it is possible to improve the workability of the assembly work and can be applied to any power plant.
　１１　原子炉格納容器
　１２　加圧水型原子炉
　１３　蒸気発生器
　１７　蒸気タービン
　１９　高圧タービン
　２０　低圧タービン
　２１　発電機
　４１　胴部
　４２　上部胴
　４３　下部胴
　４４　管群外筒
　４９　伝熱管群
　５６　気水分離器
　５７　湿分分離器
　５８　給水管
　５９　蒸気出口
　６１，６２　移動装置
　６３，６４　取付部
　７１　中間デッキプレート
　７２　下部デッキプレート
　１０２，１３２　架台
　１０３，１３３　手動ジャッキ（昇降装置）
　１０４，１３４　チルタンク（台車）
　１０５，１３５　転換装置 DESCRIPTION OF SYMBOLS 11 Reactor containment vessel 12 Pressurized water reactor 13 Steam generator 17 Steam turbine 19 High pressure turbine 20 Low pressure turbine 21 Generator 41 Trunk part 42 Upper trunk 43 Lower trunk 44 Tube group outer tube 49 Heat transfer tube group 56 Air-water separator 57 Moisture separator 58 Water supply pipe 59 Steam outlet 61, 62 Moving device 63, 64 Mounting portion 71 Intermediate deck plate 72 Lower deck plate 102, 132 Base 103, 133 Manual jack (elevating device)
104,134 Chill tank (cart)
105,135 Conversion device

Claims (5)

  1. 　中空密閉形状をなして上部胴と下部胴が接合されてなる胴部と、
    　該胴部内に逆Ｕ字形状をなすように配設されて一次冷却水が流動する複数の伝熱管からなる伝熱管群と、
    　前記胴部内の下部に固定されて前記複数の伝熱管の端部を支持する管板と、
    　前記胴部の下端部に設けられて前記複数の伝熱管の各端部に連通する入口側水室鏡及び出口側水室鏡と、
    　前記胴部内に二次冷却水を供給する給水部と、
    　前記胴部内における前記伝熱管群の上方に配設される気水分離器と、
    　前記胴部内における前記気水分離器の上方に配設される湿分分離器と、
    　前記胴部の上端部に設けられる蒸気出口と、
    　を備える蒸気発生器において、
    　前記気水分離器に組立用移動装置の取付部が設けられる、
    　ことを特徴とする蒸気発生器。     A body formed by joining an upper body and a lower body in a hollow sealed shape;
    A heat transfer tube group comprising a plurality of heat transfer tubes arranged in an inverted U-shape in the body and through which primary cooling water flows;
    A tube plate that is fixed to a lower portion in the body portion and supports ends of the plurality of heat transfer tubes;
    An inlet-side water chamber mirror and an outlet-side water chamber mirror that are provided at the lower end portion of the trunk portion and communicate with each end portion of the plurality of heat transfer tubes;
    A water supply part for supplying secondary cooling water into the body part;
    A steam separator disposed above the heat transfer tube group in the body portion;
    A moisture separator disposed above the steam separator in the trunk;
    A steam outlet provided at the upper end of the barrel;
    A steam generator comprising:
    A mounting portion for the assembly moving device is provided in the steam separator.
    A steam generator characterized by that.
  2. 　前記気水分離器は、前記胴部の内壁面に固定される中間デッキプレートと、前記胴部の内壁面に固定されて前記中間デッキプレートの下方に位置する下部デッキプレートと、前記中間デッキプレートと前記下部デッキプレートの間に架設されるライザと、該ライザ内に設けられるベーンとを有し、前記取付部は、前記中間デッキプレート及び前記下部デッキプレートに設けられることを特徴とする請求項１に記載の蒸気発生器。 The steam / water separator includes an intermediate deck plate fixed to an inner wall surface of the trunk portion, a lower deck plate fixed to the inner wall surface of the trunk portion and positioned below the intermediate deck plate, and the intermediate deck plate And a riser installed between the lower deck plate and a vane provided in the riser, and the attachment portion is provided on the intermediate deck plate and the lower deck plate. The steam generator according to 1.
  3. 　内部に管群外筒及び伝熱管群が収容されて横倒しに支持された下部胴に対して内部に湿分分離器に気水分離器が接近した位置に収容された上部胴を所定の接合位置に配置する胴部配置工程と、
    　内部から前記上部胴と前記下部胴とを溶接により接合する胴部接合工程と、
    　前記気水分離器を前記湿分分離器から離間して前記管群外筒の上端部に密着する位置に移動する気水分離器移動工程と、
    　前記管群外筒の上端部に前記気水分離器を溶接により接合する気水分離器接合工程と、
    　を有することを特徴とする蒸気発生器の組立方法。     Predetermined joining position of the upper shell housed in the position where the steam separator is close to the moisture separator with respect to the lower shell which is accommodated in the tube tube outer tube and the heat transfer tube group inside A torso placement step to be placed on,
    A body part joining step for joining the upper body and the lower body from inside by welding;
    A steam-water separator moving step of moving the steam-water separator away from the moisture separator and moving to a position in close contact with the upper end of the tube group outer cylinder;
    A steam-water separator joining step for joining the steam-water separator to the upper end of the tube group outer cylinder by welding;
    A method of assembling a steam generator, comprising:
  4. 　前記気水分離器移動工程は、前記気水分離器を移動装置に搭載する搭載工程と、前記移動装置により前記気水分離器の周方向位置の調整を行う位置調整工程と、前記移動装置を方向転換してから前記気水分離器を前記管群外筒の上端部側に移動する移動工程と、を有することを特徴とする請求項３に記載の蒸気発生器の組立方法。 The steam-water separator moving step includes a mounting step of mounting the steam-water separator on a moving device, a position adjusting step of adjusting a circumferential position of the steam-water separator by the moving device, and the moving device. The steam generator assembling method according to claim 3, further comprising: a moving step of moving the steam-water separator to the upper end side of the tube group outer cylinder after the direction is changed.
  5. 　内部に管群外筒及び伝熱管群が収容された下部胴と内部に湿分分離器及び気水分離器が収容された上部胴とを横倒し状態で接合するときに前記気水分離器を移動可能な移動装置であって、
    　前記気水分離器の前後に着脱自在な架台と、
    　該架台を介して前記気水分離器を昇降自在な昇降装置と、
    　前記架台に着脱自在な台車と、
    　前記架台に対して台車の走行方向を転換する転換装置と、
    　を備えることを特徴とする気水分離器の移動装置。     The steam / water separator is moved when the lower shell containing the tube group outer tube and heat transfer tube group inside and the upper shell containing the moisture separator and steam / water separator inside are joined in a lying state. A possible mobile device,
    A detachable frame before and after the steam separator;
    An elevating device capable of elevating the steam separator through the gantry;
    A carriage detachably attached to the mount;
    A conversion device for changing a traveling direction of the carriage with respect to the mount;
    A device for moving a steam separator, comprising:
PCT/JP2011/075413 2010-11-09 2011-11-04 Steam generator, method for assembling steam generator, and moving devices of steam-water separator WO2012063731A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54138901A (en) * 1978-04-14 1979-10-27 Westinghouse Electric Corp Working stand apparatus
JPH08271670A (en) * 1995-03-30 1996-10-18 Taihei Dengiyou Kk Method for setting heavy weight device in reactor containment vessel
JP2007271157A (en) * 2006-03-31 2007-10-18 Mitsubishi Heavy Ind Ltd Support structure for heat transfer tube

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54138901A (en) * 1978-04-14 1979-10-27 Westinghouse Electric Corp Working stand apparatus
JPH08271670A (en) * 1995-03-30 1996-10-18 Taihei Dengiyou Kk Method for setting heavy weight device in reactor containment vessel
JP2007271157A (en) * 2006-03-31 2007-10-18 Mitsubishi Heavy Ind Ltd Support structure for heat transfer tube

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