CN109935354A - A kind of two-sided cooling annular fuel assembly of hexagon - Google Patents
A kind of two-sided cooling annular fuel assembly of hexagon Download PDFInfo
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- CN109935354A CN109935354A CN201711369609.6A CN201711369609A CN109935354A CN 109935354 A CN109935354 A CN 109935354A CN 201711369609 A CN201711369609 A CN 201711369609A CN 109935354 A CN109935354 A CN 109935354A
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- pipe
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- 239000000446 fuel Substances 0.000 title claims abstract description 359
- 238000001816 cooling Methods 0.000 title claims abstract description 47
- 125000006850 spacer group Chemical group 0.000 claims abstract description 48
- 239000008188 pellet Substances 0.000 claims abstract description 31
- 210000003205 muscle Anatomy 0.000 claims description 15
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 239000002826 coolant Substances 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 7
- 238000005273 aeration Methods 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 229910001093 Zr alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 8
- 239000007789 gas Substances 0.000 abstract description 6
- 230000004992 fission Effects 0.000 abstract description 5
- 239000003758 nuclear fuel Substances 0.000 abstract description 5
- 238000011161 development Methods 0.000 abstract description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 239000001257 hydrogen Substances 0.000 abstract description 3
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 3
- 230000008961 swelling Effects 0.000 abstract description 2
- 239000000306 component Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000116 mitigating effect Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention belongs to nuclear fuel assembly technical fields, more particularly to a kind of two-sided cooling annular fuel assembly of hexagon, purpose is a kind of cooling annular fuel assembly of the fixed square double-sided in fuel rod lower end of Development and design, solve the problem of that existing rod shape fuel component is easy to produce the increase of fission gas burst size, involucrum corrosion in use and inhales hydrogen increase, fuel pellet swelling, fuel element and the aggravation of component irradiation growth.It is characterized by comprising upper tube socket, fuel rod, grid spacer, bottom nozzle, guide pipe and gauge pipes；Fuel rod, guide pipe and gauge pipe are inserted in grid spacer；Grid spacer shares multiple, sets gradually along axial direction；The upper end of guide pipe and gauge pipe is fixedly connected with upper tube socket, and lower end is fixedly connected with bottom nozzle；Bottom nozzle is inserted into the lower end of fuel rod, is fixedly connected with bottom nozzle；When fuel rod generates irradiation growth, fuel rod expands upwards；The fuel rod uses annular fuel.
Description
Technical field
The invention belongs to nuclear fuel assembly technical fields, and in particular to a kind of two-sided cooling annular fuel assembly of hexagon.
Background technique
In nuclear power plant reactor operational process, the performance of nuclear fuel be influence nuclear reactor safety and economy it is important because
Element.Therefore the research of fuel element is placed on status very outstanding always in the world, by the design of optimization fuel element, used
The methods of advanced configuration material, improvement component manufacturing process, are continuously improved the various performances of nuclear fuel element, promote nuclear power to more
Safe and more economical direction is developed.
Full property and economy are the bases of nuclear power developing, and almost all of nuclear power technology development is all to increase Nuclear Safety
It is target with economy.Fuel element as nuclear power plant's reactor core component, performance be Nuclear Safety and economy most
One of major influence factors, therefore the research of fuel element is placed on status very outstanding always in the world, it is fired by optimization
Expect element design, using the methods of advanced configuration material, improvement component manufacturing process, the various property of nuclear fuel element are continuously improved
Can, promote nuclear power to develop to safer and more economical direction.
PWR nuclear power plant generallys use rod shape fuel at present, can by deepen component discharge burn-up, extend the refulling cycle,
Power plant's operation cost is reduced, economics in nuclear power is improved.The average design burnup of PWR fuel assembly from the 10 of early stage~
15GWd/tU is stepped up, and has reached 60~70GWd/tU so far, and the refulling cycle also correspondingly extended to from 12 months present
18 or 24 months.Fuel-assembly burn-up intensification also brings such as increase of fission gas burst size, involucrum corrosion and inhales hydrogen increase, combustion
Expect a series of problems, such as pellet swelling, fuel element and component irradiation growth aggravate.How to solve these problems, is always the world
The vital task of PWR Fuel element research, for example, the advanced involucrum that research and development corrosion resistance is good, is released using low fission gas
Put the pellet of rate.In addition, increasing the approach such as component critical heat flux density by improving grid spacer design, also improving reaction
The overall security of heap reactor core.Generally speaking, rod shape fuel modular construction and parameter be nearly 50 years develop continue to optimize as a result,
Technological improvement based on rod shape fuel is very limited for the potentiality for promoting economics in nuclear power and safety, therefore, closely
Over a little years, a kind of new thinking of development is become using the fuel element of other geometries.
Following five basic demands are at least met for the fuel element of new geometric structure: 1) " the table of fuel can be improved
Area/volume " ratio；2) pellet thickness can be reduced；3) there is enough rigidity；4) reactor core pressure drop can be reduced；5) component will have open type
Grid design.The light water reactor that Massachusetts Institute Technology the proposes earliest concept of annular fuel element, very well satisfies
State 5 requirements.So-called annular fuel is that ring-type is made in fuel pellet, cladding tubes is installed additional in pellet inner and outer surfaces, so that cooling
Agent can cool down element compared with traditional solid cylindrical fuel simultaneously from inside and outside two runners, annular fuel
Benefit is under very high linear density, and the temperature of Central Fuel is still very low, and the energy storage in fuel is less, fission gas release
It is less.Fuel performance is preferable under expectable normal operation and transient condition.
Annular fuel can increase substantially the biography of fuel element as the advanced fuel element reformed completely in a kind of structure
The thermal efficiency reduces fuel pellet temperature, can be obviously improved the safety and economy of reactor, it has also become presurized water reactor advanced fuel
One of important trend of component is paid close attention to by industry in the world.Beauty, Han Deng state have carried out annular fuel in succession
Research and development, research shows that annular fuel has a good application prospect.
Summary of the invention
It is an object of the invention to a kind of two-sided cooling annular fuel assemblies of hexagon of Development and design, solve existing rodlike combustion
Expect component in use, is easy to produce the increase of fission gas burst size, involucrum corrodes and suction hydrogen increases, fuel pellet is swollen
The problem of swollen, fuel element and component irradiation growth aggravate.
It is described that technical scheme is as follows:
A kind of two-sided cooling annular fuel assembly of hexagon, including upper tube socket, fuel rod, grid spacer, bottom nozzle, guiding
Pipe and gauge pipe；Fuel rod, guide pipe and gauge pipe are inserted in grid spacer；Grid spacer share it is multiple, successively along axial direction
Setting；The upper end of guide pipe and gauge pipe is fixedly connected with upper tube socket, and lower end is fixedly connected with bottom nozzle；It inserts the lower end of fuel rod
Enter bottom nozzle, is fixedly connected with bottom nozzle；When fuel rod generates irradiation growth, fuel rod expands upwards；The fuel rod
Using annular fuel.
Grid spacer as described above shares eight to ten three, sets gradually along axial direction；Grid spacer is used for fuel rod
It is fixed, and keeps fuel rod spacing.
Grid spacer as described above shares 11.
The fuel rod of fuel assembly as described above uses side length for 2 to 15 hexagonal array forms.
The fuel rod of fuel assembly as described above uses side length for 2 hexagonal array forms, including 6 fuel rods
With 1 guide pipe；Guide pipe is located at center, and fuel rod is distributed in around guide pipe.
The fuel rod of fuel assembly as described above uses side length for 5 hexagonal array forms, including 60 fuel
Stick and 1 guide pipe；Guide pipe is located at center, and fuel rod is distributed in around guide pipe.
The fuel rod of fuel assembly as described above uses side length for 5 hexagonal array forms, including 54 fuel
Stick, 6 guide pipes and 1 gauge pipe；6 guide pipes are in ten half equivalent arrangements, and gauge pipe is located at center.
The fuel rod of fuel assembly as described above uses side length for 7 hexagonal array forms, including 120 fuel
Stick, 6 guide pipes and 1 gauge pipe；6 guide pipes are in ten half equivalent arrangements, and gauge pipe is located at center.
The fuel rod of fuel assembly as described above uses side length for 7 hexagonal array forms, including 114 fuel
Stick, 12 guide pipes and 1 gauge pipe；12 guide pipes are in ten half equivalent arrangements, and gauge pipe is located at center.
The fuel rod of fuel assembly as described above uses side length for 7 hexagonal array forms, including 108 fuel
Stick, 18 guide pipes and 1 gauge pipe；18 guide pipes are in ten half equivalent arrangements, and gauge pipe is located at center.
The fuel rod of fuel assembly as described above uses side length for 9 hexagonal array forms, including 210 fuel
Stick, 6 guide pipes and 1 gauge pipe；6 guide pipes are in ten half equivalent arrangements, and gauge pipe is located at center.
The fuel rod of fuel assembly as described above uses side length for 9 hexagonal array forms, including 204 fuel
Stick, 12 guide pipes and 1 gauge pipe；12 guide pipes are in ten half equivalent arrangements, and gauge pipe is located at center.
The fuel rod of fuel assembly as described above uses side length for 9 hexagonal array forms, including 198 fuel
Stick, 18 guide pipes and 1 gauge pipe；18 guide pipes are in ten half equivalent arrangements, and gauge pipe is located at center.
The fuel rod of fuel assembly as described above use side length for 11 hexagonal array forms, including 324 fire
Charge bar, 6 guide pipes and 1 gauge pipe；6 guide pipes are in ten half equivalent arrangements, and gauge pipe is located at center.
The fuel rod of fuel assembly as described above use side length for 11 hexagonal array forms, including 318 fire
Charge bar, 12 guide pipes and 1 gauge pipe；12 guide pipes are in ten half equivalent arrangements, and gauge pipe is located at center.
The fuel rod of fuel assembly as described above use side length for 11 hexagonal array forms, including 312 fire
Charge bar, 18 guide pipes and 1 gauge pipe；18 guide pipes are in ten half equivalent arrangements, and gauge pipe is located at center.
The fuel rod of fuel assembly as described above use side length for 11 hexagonal array forms, including 306 fire
Charge bar, 24 guide pipes and 1 gauge pipe；24 guide pipes are in ten half equivalent arrangements, and gauge pipe is located at center.
The fuel rod of fuel assembly as described above use side length for 15 hexagonal array forms, including 624 fire
Charge bar, 6 guide pipes and 1 gauge pipe；6 guide pipes are in ten half equivalent arrangements, and gauge pipe is located at center.
The fuel rod of fuel assembly as described above use side length for 15 hexagonal array forms, including 618 fire
Charge bar, 12 guide pipes and 1 gauge pipe；12 guide pipes are in ten half equivalent arrangements, and gauge pipe is located at center.
The fuel rod of fuel assembly as described above use side length for 15 hexagonal array forms, including 612 fire
Charge bar, 18 guide pipes and 1 gauge pipe；18 guide pipes are in ten half equivalent arrangements, and gauge pipe is located at center.
The fuel rod of fuel assembly as described above use side length for 15 hexagonal array forms, including 606 fire
Charge bar, 24 guide pipes and 1 gauge pipe；24 guide pipes are in ten half equivalent arrangements, and gauge pipe is located at center.
Minimum clearance between the two as above adjacent fuel rods is 0.5 to 3mm；Fuel rod 2 and adjacent guide pipe 5
Between center away from should be with the center between adjacent two fuel rods 2 away from equal.
Gap between two consecutive fuel sticks as described above is 1.5mm.
Upper tube socket upper end is provided with holddown spring and upper tube socket dowel hole as described above；There are four holddown spring is total,
It is separately positioned on the four edges at the top of tube socket, for compressing fuel assembly；There are two upper tube socket dowel hole is total, set respectively
It sets on diagonal at the top of upper tube socket, passes through the positioning realized with bayonet fittings to fuel assembly.
Grid spacer is provided on grid spacer as described above to connect with guide pipe contact surface and grid spacer with fuel rod
Contacting surface is respectively used to position guide pipe and fuel rod；There is grid spacer and guide pipe contact surface in grid spacer
Grid position it is corresponding with the position of guide pipe, the position of the grid with grid spacer and fuel rod contact surface and fuel
The position of stick is corresponding.
The upper end of bottom nozzle as described above is respectively arranged with the fuel rod peace of the guide pipe mounting hole of bottom nozzle, bottom nozzle
Fill hole, the gauge pipe mounting hole of bottom nozzle and bottom nozzle discharge orifice；The position of the guide pipe mounting hole of bottom nozzle and guide pipe
Position is corresponding, is used for fixed guide pipe；The position of the fuel rod mounting hole of bottom nozzle is corresponding with the position of fuel rod, is used for
Fixed fuel stick；The position of the position gauge pipe of the gauge pipe mounting hole of bottom nozzle is corresponding, is used for fixed instrumentation pipe；Bottom nozzle
Discharge orifice is for passing through coolant.
There are sufficient spaces for installing anti-foreign matter structure or device for the lower end of bottom nozzle as described above.
Fuel rod generally cyclic structure as described above, outermost layer are outer envelope, and innermost layer is interior involucrum, in outer envelope
It is pellet between interior involucrum；It is provided with gap between outer envelope and pellet, between pellet and interior involucrum, it is convenient for assembly.
Interior involucrum connects upper end plug by argon arc welding with above outer envelope, and interior involucrum connects lower end by argon arc welding with below outer envelope
Plug；It is symmetrical arranged two side opening in upper end plug, coolant is made up of these side opening into interior involucrum inner wall
Hollow duct, integral ring-shaped fuel rod is cooled down；The annular fuel rod is fixed on down tube by eyelets
On seat；The eyelets upper end spiral is connected to the outer surface of lower end plug；Eyelets lower end spiral is fastened on down
On tube socket；Holddown spring is mounted on pellet upper end, and providing thrust in transport prevents pellet play, avoids pellet breakage；
One aeration aperture is set in upper end plug, the sky for being used to accommodate pellet being nested to form by the inside involucrum of the aeration aperture and outer envelope
It is intracavitary to pour helium.
Upper tube socket and bottom nozzle are made of stainless steel as described above, the involucrum of fuel rod, grid spacer, guiding
Pipe and gauge pipe are made of Zirconium alloy material.
The invention also includes anti-foreign matter component, whole hexagonal structure is arranged in bottom nozzle lower surface and bottom nozzle branch
Between leg；The anti-foreign matter component includes anti-foreign matter plate muscle, anti-foreign matter framework and anti-foreign matter net；
Six side of edge part of the anti-foreign matter screen frame body rolls over 90 °, radius bend 30mm~60mm upwards, the side with bottom nozzle
Side is threadedly coupled, and the anti-foreign matter screen frame body is formed by slab overall processing, thickness 3mm~8mm, is set in the anti-foreign matter framework
It is equipped with the anti-foreign matter plate muscle that several parallel intervals are arranged in framework, anti-foreign matter plate muscle is provided with threaded hole；
The anti-foreign matter net is fitted on anti-foreign matter screen frame body lower end surface, and six side of edge part of anti-foreign matter net rolls over 90 ° upwards,
It fits with four sides of the edge part of anti-foreign matter screen frame body, forms four side flexure plane of edge part；
The anti-foreign matter is evenly equipped with the aperture matched with anti-foreign matter plate muscle upper screwed hole, anti-foreign matter net and anti-foreign matter on the net
Plate muscle is spirally connected；The anti-foreign matter net further includes multiple filter hole units；The anti-foreign matter net is formed by thin plate overall processing, thickness
The side length of 0.8mm~3mm, the filter hole unit are set as 0.15~0.35mm；
Six angles setting of the anti-foreign matter framework is fluted, six supporting legs of the groove size fitting bottom nozzle；
Six angles of the anti-foreign matter net are also equipped with groove, match with the groove size in anti-foreign matter framework.
The beneficial effects of the present invention are:
The present invention uses annular fuel, can substantially mention under the premise of keeping or promoting existing reactor safety nargin
Rise reactor core output power density, hence it is evident that improve the economy of nuclear power.Under accidental conditions, ring-type element bulk temperature is far below
Rod type element；Under major accident operating condition, the feature that the temperature of annular fuel pellet is low, energy storage is few can delay fuel element packet
The process of shell failure, provides valuable time for subsequent accident mitigation and emergency response, improves consolidating for PWR nuclear power plant
There is safety.Annular fuel can also reduce the flow resistance of component, and the resistance of reactor core reduces, and presurized water reactor core can be effectively reduced
The output power of power plant's primary Ioops pump, promotes service life.By the way that side opening is arranged in fuel rod upper end plug, enable coolant
Enough enter the hollow duct that interior involucrum inner wall is constituted by these side opening, integral ring-shaped fuel rod is cooled down, is mentioned significantly
Cooling efficiency is risen.By using the hexagonal array form of 2 to 15 fuel rods of side length, fuel rod is arranged more closely,
The area of each cooling subchannel is more uniform, conducts heat more average, not will cause the non-uniform feelings of fuel rod circumferential direction temperature distribution
Condition.By using 8 to 13 layers of grid spacer, fuel rod can be clamped, fuel rod is fixed, and keep fuel rod spacing,
So that fuel rod is located at fixed position in the reactor core of PWR nuclear power plant, and guide pipe can be made by cross-brace and determined
Position.Since fuel rod lower end is fixed with bottom nozzle, hanging type fuel rod is avoided when being irradiated by the long period, grid spacer
Chucking power reduces, and fuel rod is caused to fall.Since end plug under fuel rod and interior involucrum weld seam are located at end, fuel rod welds when falling
Bottom nozzle can be hit at seam, and welding seam failure is easily caused to cause fuel rod damaged.Using fuel rod lower end stationary structure it is avoided that
The above problem.Simultaneously because fuel rod lower end is fixed, grid spacer is not necessarily to provide biggish chucking power for fuel rod, avoids
The excessive fuel rod clad damage caused in fuel rod assembling process of grid spacer chucking power, it is also possible that grid spacer
Structure can design relatively simple, significantly reduce the manufacturing cost of fuel assembly.By two consecutive fuel sticks it
Between setting minimum clearance, while making the center between fuel rod and adjacent guide pipe away between adjacent two fuel rods
Center can make the runner of coolant more uniform, the Temperature Distribution in component is more average away from equal.The present invention also provides
A kind of circulation area is big, and manufacture difficulty is small, and the big annular fuel component bottom that is suitable for of manufacturing process simple structure intensity fills
The circulation area of the anti-foreign matter modular construction set, the bottom nozzle of circulation area foreign matter net more anti-than existing band is big by 0.6%, effectively drops
The low pressure drop of bottom nozzle of the present invention.
Detailed description of the invention
Fig. 1 is a kind of main view of the two-sided cooling annular fuel assembly of hexagon of the invention；
Fig. 2 is a kind of viewgraph of cross-section of the two-sided cooling annular fuel assembly of hexagon of the invention；
Fig. 3 is a kind of structural schematic diagram of the upper tube socket of the two-sided cooling annular fuel assembly of hexagon of the invention；
Fig. 4 is a kind of grid spacer of the two-sided cooling annular fuel assembly of hexagon of the invention；
Fig. 5 is the partial enlarged view of Fig. 4；
Fig. 6 is a kind of structural schematic diagram of the bottom nozzle of the two-sided cooling annular fuel assembly of hexagon of the invention；
Fig. 7 is a kind of main view of the fuel rod of the two-sided cooling annular fuel assembly of hexagon of the invention；
Fig. 8 is the section view of Fig. 7.
Wherein: tube socket on 1., 2. fuel rods, 3. grid spacers, 4. bottom nozzles, 5. guide pipes, 6. gauge pipes, 7. compress bullet
Spring, tube socket dowel hole on 8., 9. grid spacers and guide pipe contact surface, 10. grid spacers and fuel rod contact surface, under 11.
The guide pipe mounting hole of tube socket, the fuel rod mounting hole of 12. bottom nozzles, the gauge pipe mounting hole of 13. bottom nozzles, 14. bottom nozzles
Discharge orifice, 15. outer envelopes, 16. pellets, involucrum in 17., 18. upper end plugs, 19. holddown springs, 20. lower end plugs, 21. tubuloses are solid
Determine part, 22. side opening.
Specific embodiment
The present invention is described further with reference to the accompanying drawings and examples.
As depicted in figs. 1 and 2, the two-sided cooling annular fuel assembly of a kind of hexagon, including it is upper tube socket 1, fuel rod 2, fixed
Position screen work 3, bottom nozzle 4, guide pipe 5 and gauge pipe 6.Fuel rod 2, guide pipe 5 and gauge pipe 6 are inserted in grid spacer 3.It is fixed
Position screen work 3 shares multiple, sets gradually along axial direction.The upper end of guide pipe 5 and gauge pipe 6 is fixedly connected with upper tube socket 1, lower end with
Bottom nozzle 4 is fixedly connected.Bottom nozzle 4 is inserted into the lower end of fuel rod 2, is fixedly connected with bottom nozzle 4.When fuel rod generates irradiation life
When long, fuel rod expands upwards.The fuel rod 2 uses annular fuel.
The grid spacer 3 shares eight to ten three, sets gradually along axial direction.Preferably, grid spacer 3 shares 11
It is a.Grid spacer 3 keeps fuel rod spacing for fuel rod to be fixed, so that fuel rod is in PWR nuclear power plant
It is located at fixed position in reactor core, and guide pipe can be made by cross-brace and positioning.
The fuel rod 2 of the fuel assembly can use side length for 2 to 15 hexagonal array forms.Using upper
Stating spread pattern can be arranged more closely with fuel rod, and the area of each cooling subchannel is more uniform, conducts heat more average, will not
Cause the non-uniform situation of fuel rod circumferential direction temperature distribution.
The fuel rod 2 of the fuel assembly can use side length for 2 hexagonal array forms, including 6 fuel
Stick 2 and 1 piece guide pipe 5.Guide pipe 5 is located at center, and fuel rod 2 is distributed in around guide pipe 5.
The fuel rod 2 of the fuel assembly can also use side length for 5 hexagonal array forms, including 60 combustions
Charge bar 2 and 1 piece guide pipe 5.Guide pipe 5 is located at center, and fuel rod 2 is distributed in around guide pipe 5.
The fuel rod 2 of the fuel assembly can also use side length for 5 hexagonal array forms, including 54 combustions
2,6 guide pipe 5 and 1 piece gauge pipes 6 of charge bar.6 guide pipes 5 are in ten half equivalent arrangements, and gauge pipe 6 is located at centre bit
It sets.
The fuel rod 2 of the fuel assembly can also use side length for 7 hexagonal array forms, including 120
2,6 guide pipe 5 and 1 piece gauge pipes 6 of fuel rod.6 guide pipes 5 are in ten half equivalent arrangements, and gauge pipe 6 is located at center
Position.
The fuel rod 2 of the fuel assembly can also use side length for 7 hexagonal array forms, including 114
2,12 guide pipe 5 and 1 piece gauge pipes 6 of fuel rod.12 guide pipes 5 are in ten half equivalent arrangements, during gauge pipe 6 is located at
Heart position.
As shown in Fig. 2, the fuel rod 2 of the fuel assembly can also use side length for 7 hexagonal array forms,
Including 108 fuel rods, 2,18 guide pipe 5 and 1 piece gauge pipes 6.18 guide pipes 5 are in ten half equivalent arrangements, instrument
Pipe 6 is located at center.
The fuel rod 2 of the fuel assembly can also use side length for 9 hexagonal array forms, including 210
2,6 guide pipe 5 and 1 piece gauge pipes 6 of fuel rod.6 guide pipes 5 are in ten half equivalent arrangements, and gauge pipe 6 is located at center
Position.
The fuel rod 2 of the fuel assembly can also use side length for 9 hexagonal array forms, including 204
2,12 guide pipe 5 and 1 piece gauge pipes 6 of fuel rod.12 guide pipes 5 are in ten half equivalent arrangements, during gauge pipe 6 is located at
Heart position.
The fuel rod 2 of the fuel assembly can also use side length for 9 hexagonal array forms, including 198
2,18 guide pipe 5 and 1 piece gauge pipes 6 of fuel rod.18 guide pipes 5 are in ten half equivalent arrangements, during gauge pipe 6 is located at
Heart position.
The fuel rod 2 of the fuel assembly can also use side length for 11 hexagonal array forms, including 324
2,6 guide pipe 5 and 1 piece gauge pipes 6 of fuel rod.6 guide pipes 5 are in ten half equivalent arrangements, and gauge pipe 6 is located at center
Position.
The fuel rod 2 of the fuel assembly can also use side length for 11 hexagonal array forms, including 318
2,12 guide pipe 5 and 1 piece gauge pipes 6 of fuel rod.12 guide pipes 5 are in ten half equivalent arrangements, during gauge pipe 6 is located at
Heart position.
The fuel rod 2 of the fuel assembly can also use side length for 11 hexagonal array forms, including 312
2,18 guide pipe 5 and 1 piece gauge pipes 6 of fuel rod.18 guide pipes 5 are in ten half equivalent arrangements, during gauge pipe 6 is located at
Heart position.
The fuel rod 2 of the fuel assembly can also use side length for 11 hexagonal array forms, including 306
2,24 guide pipe 5 and 1 piece gauge pipes 6 of fuel rod.24 guide pipes 5 are in ten half equivalent arrangements, during gauge pipe 6 is located at
Heart position.
The fuel rod 2 of the fuel assembly can also use side length for 15 hexagonal array forms, including 624
2,6 guide pipe 5 and 1 piece gauge pipes 6 of fuel rod.6 guide pipes 5 are in ten half equivalent arrangements, and gauge pipe 6 is located at center
Position.
The fuel rod 2 of the fuel assembly can also use side length for 15 hexagonal array forms, including 618
2,12 guide pipe 5 and 1 piece gauge pipes 6 of fuel rod.12 guide pipes 5 are in ten half equivalent arrangements, during gauge pipe 6 is located at
Heart position.
The fuel rod 2 of the fuel assembly can also use side length for 15 hexagonal array forms, including 612
2,18 guide pipe 5 and 1 piece gauge pipes 6 of fuel rod.18 guide pipes 5 are in ten half equivalent arrangements, during gauge pipe 6 is located at
Heart position.
The fuel rod 2 of the fuel assembly can also use side length for 15 hexagonal array forms, including 606
2,24 guide pipe 5 and 1 piece gauge pipes 6 of fuel rod.24 guide pipes 5 are in ten half equivalent arrangements, during gauge pipe 6 is located at
Heart position.
In the fuel assembly of above-mentioned various spread patterns, the minimum clearance between two consecutive fuel sticks 2 is 0.5 to 3mm,
It is preferred that using 1.5mm.Center between fuel rod 2 and adjacent guide pipe 5 away from should with the center between adjacent two fuel rods 2 away from
It is equal.The runner of coolant can be made more uniform by above structure setting, the Temperature Distribution in component is more average.
As shown in figure 3, upper 1 upper end of tube socket is provided with holddown spring 7 and upper tube socket dowel hole 8.Holddown spring 7 shares four
It is a, it is separately positioned on the four edges at 1 top of tube socket, for compressing fuel assembly.There are two upper tube socket dowel hole 8 is total,
Be separately positioned on the top of tube socket 1 it is diagonal on, pass through the positioning realized with bayonet fittings to fuel assembly.
As shown in Figure 4 and Figure 5, grid spacer and guide pipe contact surface 9 and grid spacer and combustion are provided on grid spacer 3
Charge bar contact surface 10 is respectively used to position guide pipe 5 and fuel rod 2.There is grid spacer and lead in grid spacer 3
It is corresponding with the position of guide pipe 5 to the position of the grid of pipe contact surface 9, the grid with grid spacer and fuel rod contact surface 10
The position of lattice is corresponding with the position of fuel rod 2.
As shown in fig. 6, the upper end of bottom nozzle 4 is respectively arranged with the fuel of the guide pipe mounting hole 11 of bottom nozzle, bottom nozzle
Stick mounting hole 12, the gauge pipe mounting hole 13 of bottom nozzle and bottom nozzle discharge orifice 14.The position of the guide pipe mounting hole 11 of bottom nozzle
Set it is corresponding with the position of guide pipe 5, be used for fixed guide pipe 5.The position of the fuel rod mounting hole 12 of bottom nozzle and fuel rod 2
Position it is corresponding, be used for fixed fuel stick 2.The position of the position gauge pipe 6 of the gauge pipe mounting hole 13 of bottom nozzle is corresponding,
For fixed instrumentation pipe 6.Bottom nozzle discharge orifice 14 is for passing through coolant.There are sufficient spaces for pacifying for the lower end of bottom nozzle 4
Fill anti-foreign matter structure or device.
As shown in Figure 7 and Figure 8, the generally cyclic structure of fuel rod 2, outermost layer are outer envelope 15, and innermost layer is interior involucrum
17, it is pellet 16 between outer envelope 15 and interior involucrum 17.Between outer envelope 15 and pellet 16, pellet 16 and interior involucrum 17 it
Between be provided with gap, it is convenient for assembly.Interior involucrum 17 connects upper end plug 18, interior involucrum 17 by argon arc welding with above outer envelope 15
End plug 20 is connected down by argon arc welding with below outer envelope 15.Two side opening 22 are symmetrical arranged in upper end plug 18, so that cooling
Agent can enter the hollow duct that interior 17 inner wall of involucrum is constituted by these side opening 22, carry out to integral ring-shaped fuel rod cold
But.The annular fuel rod is fixed on bottom nozzle 4 by eyelets 21；The 21 upper end spiral of eyelets connection
In the outer surface of lower end plug 20；21 lower end spiral of eyelets is fastened on bottom nozzle 4.Holddown spring 19 is mounted on core
16 upper end of block, providing thrust in transport prevents 16 play of pellet, and it is damaged to avoid pellet 16.One is arranged in upper end plug 18
Aeration aperture pours helium for accommodating in the cavity of pellet 16 by what the inside involucrum 17 of the aeration aperture and outer envelope 15 were nested to form
Gas.Fuel rod 2, can be under the premise of keeping or promoting existing reactor safety nargin, substantially due to using ring structure
Promote reactor core output power density, hence it is evident that improve the economy of nuclear power.Under accidental conditions, ring-type element bulk temperature is far low
In rod type element；Under major accident operating condition, the feature that the temperature of annular fuel pellet is low, energy storage is few can delay fuel element
The process of involucrum failure, provides valuable time for subsequent accident mitigation and emergency response, improves PWR nuclear power plant
Inherent safety.Annular fuel can also reduce the flow resistance of component, and the resistance of reactor core reduces, and presurized water reactor can be effectively reduced
The output power of nuclear power plant's primary Ioops pump, promotes service life.
In the present embodiment, upper tube socket 1 and bottom nozzle 4 are made of stainless steel, involucrum, the positioning lattice of fuel rod 2
Frame 3, guide pipe 5 and gauge pipe 6 are made of Zirconium alloy material.
Preferably, the invention also includes anti-foreign matter component, whole hexagonal structure, setting in 4 lower surface of bottom nozzle and
Between 4 supporting leg of bottom nozzle.The anti-foreign matter component includes anti-foreign matter plate muscle, anti-foreign matter framework and anti-foreign matter net.
Six side of edge part of the anti-foreign matter screen frame body rolls over 90 °, radius bend 30mm~60mm upwards, the side with bottom nozzle
Side is threadedly coupled, and the anti-foreign matter screen frame body is formed by slab overall processing, thickness 3mm~8mm, is set in the anti-foreign matter framework
It is equipped with the anti-foreign matter plate muscle that several parallel intervals are arranged in framework, anti-foreign matter plate muscle is provided with threaded hole.
The anti-foreign matter net is fitted on anti-foreign matter screen frame body lower end surface, and six side of edge part of anti-foreign matter net rolls over 90 ° upwards,
It fits with four sides of the edge part of anti-foreign matter screen frame body, forms four side flexure plane of edge part.
The anti-foreign matter is evenly equipped with the aperture matched with anti-foreign matter plate muscle upper screwed hole, anti-foreign matter net and anti-foreign matter on the net
Plate muscle is spirally connected；The anti-foreign matter net further includes multiple filter hole units, the filter hole cell orifice may be configured as it is rectangular, round or
Regular hexagon structure.The anti-foreign matter net is formed by thin plate overall processing, thickness 0.8mm~3mm, the side of the filter hole unit
Length may be configured as 0.15~0.35mm.
Six angles setting of the anti-foreign matter framework is fluted, six supporting legs of the groove size fitting bottom nozzle 4.Institute
Stating the structure of anti-foreign matter screen frame body, it can also be designed to various shapes, such as: it is trapezoidal, and there is sufficiently large intensity, it can bear cold
But agent shock loading.
Six angles of the anti-foreign matter net are also equipped with groove, match with the groove size in anti-foreign matter framework.
Implementation method of the invention is explained in detail above in conjunction with embodiment, but the present invention is not limited to above-mentioned realities
Example is applied, it within the knowledge of a person skilled in the art, can also be without departing from the purpose of the present invention
Various changes can be made.The content that description in the present invention is not described in detail can use the prior art.
Claims (30)
1. a kind of two-sided cooling annular fuel assembly of hexagon, including upper tube socket (1), fuel rod (2), grid spacer (3), down tube
Seat (4), guide pipe (5) and gauge pipe (6)；Fuel rod (2), guide pipe (5) and gauge pipe (6) are inserted in grid spacer (3)；
Grid spacer (3) shares multiple, sets gradually along axial direction；The upper end of guide pipe (5) and gauge pipe (6) and upper tube socket (1) are fixed
Connection, lower end is fixedly connected with bottom nozzle (4)；Bottom nozzle (4) are inserted into the lower end of fuel rod (2), with bottom nozzle (4) fixed company
It connects；When fuel rod generates irradiation growth, fuel rod expands upwards；The fuel rod (2) uses annular fuel.
2. the two-sided cooling annular fuel assembly of hexagon according to claim 1, it is characterised in that: the grid spacer
(3) eight to ten three are shared, is set gradually along axial direction；Grid spacer (3) keeps fuel rod for fuel rod to be fixed
Spacing.
3. the two-sided cooling annular fuel assembly of hexagon according to claim 2, it is characterised in that: the grid spacer
(3) 11 are shared.
4. the two-sided cooling annular fuel assembly of hexagon according to claim 1, it is characterised in that: the fuel assembly
Fuel rod (2) use side length for 2 to 15 hexagonal array forms.
5. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: the fuel assembly
Fuel rod (2) use side length for 2 hexagonal array forms, including 6 fuel rods (2) and 1 guide pipe (5)；Guiding
Pipe (5) is located at center, and fuel rod (2) is distributed in around guide pipe (5).
6. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: the fuel assembly
Fuel rod (2) use side length for 5 hexagonal array forms, including 60 fuel rods (2) and 1 guide pipe (5)；Guiding
Pipe (5) is located at center, and fuel rod (2) is distributed in around guide pipe (5).
7. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: the fuel assembly
Fuel rod (2) use side length for 5 hexagonal array forms, including 54 fuel rods (2), 6 guide pipes (5) and 1
Gauge pipe (6)；6 guide pipes (5) are in ten half equivalent arrangements, and gauge pipe (6) is located at center.
8. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: the fuel assembly
Fuel rod (2) use side length for 7 hexagonal array forms, including 120 fuel rods (2), 6 guide pipes (5) and 1
Gauge pipe (6)；6 guide pipes (5) are in ten half equivalent arrangements, and gauge pipe (6) is located at center.
9. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: the fuel assembly
Fuel rod (2) use side length for 7 hexagonal array forms, including 114 fuel rods (2), 12 guide pipes (5) and 1
Root gauge pipe (6)；12 guide pipes (5) are in ten half equivalent arrangements, and gauge pipe (6) is located at center.
10. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: the fuel stack
The fuel rod (2) of part uses side length for 7 hexagonal array forms, including 108 fuel rods (2), 18 guide pipes (5) and
1 gauge pipe (6)；18 guide pipes (5) are in ten half equivalent arrangements, and gauge pipe (6) is located at center.
11. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: the fuel stack
The fuel rod (2) of part uses side length for 9 hexagonal array forms, including 210 fuel rods (2), 6 guide pipes (5) and 1
Root gauge pipe (6)；6 guide pipes (5) are in ten half equivalent arrangements, and gauge pipe (6) is located at center.
12. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: the fuel stack
The fuel rod (2) of part uses side length for 9 hexagonal array forms, including 204 fuel rods (2), 12 guide pipes (5) and
1 gauge pipe (6)；12 guide pipes (5) are in ten half equivalent arrangements, and gauge pipe (6) is located at center.
13. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: the fuel stack
The fuel rod (2) of part uses side length for 9 hexagonal array forms, including 198 fuel rods (2), 18 guide pipes (5) and
1 gauge pipe (6)；18 guide pipes (5) are in ten half equivalent arrangements, and gauge pipe (6) is located at center.
14. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: the fuel stack
The fuel rod (2) of part uses side length for 11 hexagonal array forms, including 324 fuel rods (2), 6 guide pipes (5) and
1 gauge pipe (6)；6 guide pipes (5) are in ten half equivalent arrangements, and gauge pipe (6) is located at center.
15. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: the fuel stack
The fuel rod (2) of part uses side length for 11 hexagonal array forms, including 318 fuel rods (2), 12 guide pipes (5)
With 1 gauge pipe (6)；12 guide pipes (5) are in ten half equivalent arrangements, and gauge pipe (6) is located at center.
16. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: the fuel stack
The fuel rod (2) of part uses side length for 11 hexagonal array forms, including 312 fuel rods (2), 18 guide pipes (5)
With 1 gauge pipe (6)；18 guide pipes (5) are in ten half equivalent arrangements, and gauge pipe (6) is located at center.
17. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: the fuel stack
The fuel rod (2) of part uses side length for 11 hexagonal array forms, including 306 fuel rods (2), 24 guide pipes (5)
With 1 gauge pipe (6)；24 guide pipes (5) are in ten half equivalent arrangements, and gauge pipe (6) is located at center.
18. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: the fuel stack
The fuel rod (2) of part uses side length for 15 hexagonal array forms, including 624 fuel rods (2), 6 guide pipes (5) and
1 gauge pipe (6)；6 guide pipes (5) are in ten half equivalent arrangements, and gauge pipe (6) is located at center.
19. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: the fuel stack
The fuel rod (2) of part uses side length for 15 hexagonal array forms, including 618 fuel rods (2), 12 guide pipes (5)
With 1 gauge pipe (6)；12 guide pipes (5) are in ten half equivalent arrangements, and gauge pipe (6) is located at center.
20. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: the fuel stack
The fuel rod (2) of part uses side length for 15 hexagonal array forms, including 612 fuel rods (2), 18 guide pipes (5)
With 1 gauge pipe (6)；18 guide pipes (5) are in ten half equivalent arrangements, and gauge pipe (6) is located at center.
21. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: the fuel stack
The fuel rod (2) of part uses side length for 15 hexagonal array forms, including 606 fuel rods (2), 24 guide pipes (5)
With 1 gauge pipe (6)；24 guide pipes (5) are in ten half equivalent arrangements, and gauge pipe (6) is located at center.
22. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: two adjacent described
Fuel rod (2) between minimum clearance be 0.5 to 3mm；Center between fuel rod 2 and adjacent guide pipe 5 away from should with it is adjacent
Center between two fuel rods 2 is away from equal.
23. the two-sided cooling annular fuel assembly of hexagon according to claim 22, it is characterised in that: two phases
Gap between adjacent fuel rod (2) is 1.5mm.
24. the two-sided cooling annular fuel assembly of hexagon according to claim 1, it is characterised in that: the upper tube socket
(1) upper end is provided with holddown spring (7) and upper tube socket dowel hole (8)；There are four holddown spring (7) is total, it is separately positioned on
On four edges at the top of tube socket (1), for compressing fuel assembly；There are two upper tube socket dowel hole (8) is total, it is separately positioned on
On diagonal at the top of tube socket (1), pass through the positioning realized with bayonet fittings to fuel assembly.
25. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: the positioning lattice
It is provided with grid spacer and guide pipe contact surface (9) and grid spacer and fuel rod contact surface (10) on frame (3), is respectively used to pair
Guide pipe (5) and fuel rod (2) are positioned；The grid with grid spacer and guide pipe contact surface (9) in grid spacer (3)
The position of lattice is corresponding with the position of guide pipe (5), the position of the grid with grid spacer and fuel rod contact surface (10) with
The position of fuel rod (2) is corresponding.
26. the two-sided cooling annular fuel assembly of hexagon according to claim 4, it is characterised in that: the bottom nozzle
(4) upper end is respectively arranged with the guide pipe mounting hole (11) of bottom nozzle, the fuel rod mounting hole (12) of bottom nozzle, bottom nozzle
Gauge pipe mounting hole (13) and bottom nozzle discharge orifice (14)；The position and guide pipe (5) of the guide pipe mounting hole (11) of bottom nozzle
Position it is corresponding, be used for fixed guide pipe (5)；The position of the fuel rod mounting hole (12) of bottom nozzle and the position of fuel rod (2)
Set it is corresponding, be used for fixed fuel stick (2)；The position of the position gauge pipe (6) of the gauge pipe mounting hole (13) of bottom nozzle is opposite
It answers, is used for fixed instrumentation pipe (6)；Bottom nozzle discharge orifice (14) is for passing through coolant.
27. the two-sided cooling annular fuel assembly of hexagon according to claim 26, it is characterised in that: the bottom nozzle
(4) there are sufficient spaces for installing anti-foreign matter structure or device for lower end.
28. the two-sided cooling annular fuel assembly of hexagon according to claim 1, it is characterised in that: the fuel rod
(2) generally cyclic structure, outermost layer are outer envelope (15), and innermost layer is interior involucrum (17), in outer envelope (15) and interior involucrum
(17) it is between pellet (16)；It is respectively provided between outer envelope (15) and pellet (16), between pellet (16) and interior involucrum (17)
There is gap, it is convenient for assembly；Interior involucrum (17) is connected upper end plug (18) with above outer envelope (15) by argon arc welding, interior involucrum (17)
End plug (20) are connected down by argon arc welding with below outer envelope (15)；Two side opening (22) are symmetrical arranged in upper end plug (18),
Coolant is enabled to enter the hollow duct that interior involucrum (17) inner wall is constituted by these side opening (22), to integral ring-shaped combustion
Charge bar is cooled down；The annular fuel rod is fixed on bottom nozzle (4) by eyelets (21)；The eyelets
(21) upper end spiral is connected to the outer surface of lower end plug (20)；Eyelets (21) lower end spiral is fastened on bottom nozzle
(4) on；Holddown spring (19) is mounted on pellet (16) upper end, and providing thrust in transport prevents pellet (16) play, avoids making
At pellet (16) breakage；One aeration aperture is set in upper end plug (18), passes through the inside involucrum of the aeration aperture (17) and outer envelope
(15) helium is poured in the cavity for accommodating pellet (16) being nested to form.
29. the two-sided cooling annular fuel assembly of hexagon according to claim 1, it is characterised in that: the upper tube socket
(1) it is made of stainless steel with bottom nozzle (4), involucrum, grid spacer (3), guide pipe (5) and the instrument of fuel rod (2)
Pipe (6) is made of Zirconium alloy material.
30. the two-sided cooling annular fuel assembly of hexagon according to claim 27, it is characterised in that: it further include prevent it is different
Object component, whole hexagonal structure, is arranged between bottom nozzle (4) lower surface and bottom nozzle (4) supporting leg；The anti-foreign matter
Component includes anti-foreign matter plate muscle, anti-foreign matter framework and anti-foreign matter net；
Six side of edge part of the anti-foreign matter screen frame body rolls over 90 °, radius bend 30mm~60mm upwards, the side spiral shell with bottom nozzle
Line connection, the anti-foreign matter screen frame body are formed by slab overall processing, thickness 3mm~8mm, are provided in the anti-foreign matter framework
Several parallel intervals are arranged in the anti-foreign matter plate muscle in framework, and anti-foreign matter plate muscle is provided with threaded hole；
The anti-foreign matter net is fitted on anti-foreign matter screen frame body lower end surface, and six side of edge part of anti-foreign matter net rolls over 90 ° upwards, and anti-
Four sides of the edge part of foreign matter screen frame body fit, and form four side flexure plane of edge part；
The anti-foreign matter is evenly equipped with the aperture matched with anti-foreign matter plate muscle upper screwed hole, anti-foreign matter net and anti-foreign matter plate muscle on the net
It is spirally connected；The anti-foreign matter net further includes multiple filter hole units；The anti-foreign matter net is formed by thin plate overall processing, thickness
The side length of 0.8mm~3mm, the filter hole unit are set as 0.15~0.35mm；
Six angles setting of the anti-foreign matter framework is fluted, six supporting legs of groove size fitting bottom nozzle (4)；
Six angles of the anti-foreign matter net are also equipped with groove, match with the groove size in anti-foreign matter framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711369609.6A CN109935354A (en) | 2017-12-19 | 2017-12-19 | A kind of two-sided cooling annular fuel assembly of hexagon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711369609.6A CN109935354A (en) | 2017-12-19 | 2017-12-19 | A kind of two-sided cooling annular fuel assembly of hexagon |
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| CN109935354A true CN109935354A (en) | 2019-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711369609.6A Pending CN109935354A (en) | 2017-12-19 | 2017-12-19 | A kind of two-sided cooling annular fuel assembly of hexagon |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115116629A (en) * | 2022-05-11 | 2022-09-27 | 中国原子能科学研究院 | Annular fuel end plug, annular fuel assembly and welding method |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85109766A (en) * | 1984-12-06 | 1986-07-09 | 法玛汤姆和柯吉玛公司 | Fuel assembly for nuclear reactors |
| US5533078A (en) * | 1994-09-29 | 1996-07-02 | Siemens Power Corporation | Nuclear fuel assembly for a pressurized water reactor |
| JPH11109074A (en) * | 1997-10-06 | 1999-04-23 | Mitsubishi Heavy Ind Ltd | Reactor fuel assembly and its lower nozzle |
| US20070165766A1 (en) * | 2006-01-13 | 2007-07-19 | Westinghouse Electric Company Llc | Nuclear fuel assemblies with structural support replacement rods |
| CN102117664A (en) * | 2010-12-24 | 2011-07-06 | 中国核动力研究设计院 | Double-row hexagonal fuel assembly for supercritical water-cooled reactor |
| CN102169735A (en) * | 2010-12-23 | 2011-08-31 | 中国原子能科学研究院 | Nuclear power station fuel rod breakage on-line detection system |
| CN102354539A (en) * | 2011-09-15 | 2012-02-15 | 西安交通大学 | Annular fuel element and annular fuel supercritical water reactor |
| CN202205467U (en) * | 2011-07-18 | 2012-04-25 | 中国原子能科学研究院 | Tubular positioning grid of pressurized water reactor double-sided cooling fuel rod |
| CN102592688A (en) * | 2012-03-02 | 2012-07-18 | 华北电力大学 | Double-layer water rod assembly structure for supercritical water cooled reactor |
| CN104183279A (en) * | 2014-08-26 | 2014-12-03 | 南华大学 | Inner-cooling pressurized-water reactor core |
| CN105453184A (en) * | 2013-05-10 | 2016-03-30 | 钍能源股份有限公司 | Fuel assembly |
| JP2016090396A (en) * | 2014-11-05 | 2016-05-23 | 株式会社東芝 | Fast reactor fuel element, fast reactor fuel assembly and fast reactor core |
| CN206363763U (en) * | 2016-12-23 | 2017-07-28 | 中广核研究院有限公司 | Three cold type fuel rod and fuel assembly |
| CN207731666U (en) * | 2017-12-19 | 2018-08-14 | 中国原子能科学研究院 | A kind of two-sided cooling annular fuel assembly of hexagon |
| CN109935348A (en) * | 2017-12-19 | 2019-06-25 | 中国原子能科学研究院 | A kind of two-sided cooling annular fuel assembly being provided with periphery protection structure |
-
2017
- 2017-12-19 CN CN201711369609.6A patent/CN109935354A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85109766A (en) * | 1984-12-06 | 1986-07-09 | 法玛汤姆和柯吉玛公司 | Fuel assembly for nuclear reactors |
| US5533078A (en) * | 1994-09-29 | 1996-07-02 | Siemens Power Corporation | Nuclear fuel assembly for a pressurized water reactor |
| JPH11109074A (en) * | 1997-10-06 | 1999-04-23 | Mitsubishi Heavy Ind Ltd | Reactor fuel assembly and its lower nozzle |
| US20070165766A1 (en) * | 2006-01-13 | 2007-07-19 | Westinghouse Electric Company Llc | Nuclear fuel assemblies with structural support replacement rods |
| CN102169735A (en) * | 2010-12-23 | 2011-08-31 | 中国原子能科学研究院 | Nuclear power station fuel rod breakage on-line detection system |
| CN102117664A (en) * | 2010-12-24 | 2011-07-06 | 中国核动力研究设计院 | Double-row hexagonal fuel assembly for supercritical water-cooled reactor |
| CN202205467U (en) * | 2011-07-18 | 2012-04-25 | 中国原子能科学研究院 | Tubular positioning grid of pressurized water reactor double-sided cooling fuel rod |
| CN102354539A (en) * | 2011-09-15 | 2012-02-15 | 西安交通大学 | Annular fuel element and annular fuel supercritical water reactor |
| CN102592688A (en) * | 2012-03-02 | 2012-07-18 | 华北电力大学 | Double-layer water rod assembly structure for supercritical water cooled reactor |
| CN105453184A (en) * | 2013-05-10 | 2016-03-30 | 钍能源股份有限公司 | Fuel assembly |
| CN104183279A (en) * | 2014-08-26 | 2014-12-03 | 南华大学 | Inner-cooling pressurized-water reactor core |
| JP2016090396A (en) * | 2014-11-05 | 2016-05-23 | 株式会社東芝 | Fast reactor fuel element, fast reactor fuel assembly and fast reactor core |
| CN206363763U (en) * | 2016-12-23 | 2017-07-28 | 中广核研究院有限公司 | Three cold type fuel rod and fuel assembly |
| CN207731666U (en) * | 2017-12-19 | 2018-08-14 | 中国原子能科学研究院 | A kind of two-sided cooling annular fuel assembly of hexagon |
| CN109935348A (en) * | 2017-12-19 | 2019-06-25 | 中国原子能科学研究院 | A kind of two-sided cooling annular fuel assembly being provided with periphery protection structure |
Non-Patent Citations (1)
| Title |
|---|
| 季松涛 等: "压水堆核电站采用 环形燃料元件可行性研究", 《原子能科学技术》, vol. 46, no. 10, pages 2 - 1 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115116629A (en) * | 2022-05-11 | 2022-09-27 | 中国原子能科学研究院 | Annular fuel end plug, annular fuel assembly and welding method |
| CN115116629B (en) * | 2022-05-11 | 2024-05-10 | 中国原子能科学研究院 | Annular fuel end plug, annular fuel assembly and welding method |
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