CN106128530B - A kind of fuel assembly spike pulling method under water - Google Patents
A kind of fuel assembly spike pulling method under water Download PDFInfo
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- CN106128530B CN106128530B CN201610519530.6A CN201610519530A CN106128530B CN 106128530 B CN106128530 B CN 106128530B CN 201610519530 A CN201610519530 A CN 201610519530A CN 106128530 B CN106128530 B CN 106128530B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/19—Reactor parts specifically adapted to facilitate handling, e.g. to facilitate charging or discharging of fuel elements
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/26—Arrangements for removing jammed or damaged fuel elements or control elements; Arrangements for moving broken parts thereof
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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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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention discloses a kind of fuel assembly spike pulling method under water, by carrying out locking upper base, removable screw, base in movement, mounting screw again, crimp screw, carry out fuel rod positioning and guiding, extract and install fuel rod these steps, establish fuel assembly spike pulling technology under water, pulling capacity measurement part is installed on fuel rod replacing device, reflect the pulling capacity size of every fuel rod in real time, protect fuel rod safety and structural intergrity in burst slug rod drawing process, reduce fuel rod risk of breakage in drawing process, supported for fuel assembly recovery technique.
Description
Technical field
The invention belongs to nuclear fuel cycle technical field, and in particular to a kind of fuel assembly spike pulling method under water.
Background technology
At present, although the workmanship and reliability of operation of PWR fuel assembly have reached very high level, combustion
Expect probability of damage although very low, in addition many reactor fuels in cycle period sometimes completely without fuel degradation, but still
It can not possibly prevent completely.For the utilization fuel element of economical rationality, fuel original paper utilization rate is improved, differentiates burst slug in time
Component simultaneously extracts burst slug rod, reduces burst slug and is reloaded into reactor core and pollutes reactor core and cooling agent, reduces damaged weary combustion
Material component is mixed into storage cistern and pollutes water and reprocessing plant probability, it is necessary to which fuel rod is extracted, but there are currently no special
Spike pulling method.
The content of the invention
It is an object of the invention to set up a kind of fuel assembly spike pulling method under water, every fuel assembly pulling capacity of measurement is big
Small, fuel rod safety and structural intergrity in protection burst slug rod drawing process provide technology for damaged fuel assembly reparation
Support.
The present invention is achieved through the following technical solutions：
A kind of fuel assembly spike pulling method under water, comprises the following steps：
(1) in movement the supreme base of base setting tool surface, will upper base setting tool pin insertion on manage
In the corresponding hole of seat, base in the handle of base setting tool, locking is pushed；
(2) directly over the mobile supreme base of screw dismantling device, it is any that the lower end of screw dismantling device is inserted into base
In one screw hole, turn rotary handle control cylinder opens the gripping apparatus of screw dismantling device lower end, rotary screw dismantling device
It can naturally enter in sleeve and firmly grasp the screw, the compression lock for pressing screw dismantling device closes gripping apparatus, uses torque
Spanner rotates screw dismantling device and rotated to same direction, and mobile screw dismantling device will after upper base fixing screws are screwed out
Screw is put into screw storage device, repeats above-mentioned screw disassembling step, and screw storage is all removed and placed in all screws
In device；
(3) telescope-srew dismantling device is removed, upper base installation tool is moved to the surface of upper base, upper base peace
Expressing in the upper corresponding hole of base of pin insertion for holding tool, presses the upper base of jettron locking of base installation tool,
Base installation tool in lifting, upper base is removed from crude fuel component；
(4) the upper base dismantled is moved to the surface of fuel assembly to be installed, passes through upper base installation tool
Constantly the upper base position of adjustment, finds the best position of base, the jettron for pressing base installation tool is put down
Upper base, then removes upper base installation tool, screw dismantling device is moved to the surface of new screw storage device, spiral shell is used
The gripping apparatus of nail dismantling device firmly grasps wherein one screw, and the screw is inserted in corresponding screw, opens screw dismantling device
Jettron, lock-screw rotates screw dismantling device with torque spanner and rotated to same direction, repeat above-mentioned screw peace
Step is filled, until the new screw in all screw holes is all arranged on into upper base screwhole position；
(5) after installation, remove screw dismantling device, will envelope silicon instrument be placed on the screw of mounting screw just on
Side, screw crimping tool is inserted in screw and carries out crimping processing to each screw successively；
(6) according to burst slug rod position, selecting extraction and the odd number in positioning and steering tool is reassembled in positioner
Positioning and the positioning of steering tool or even number and steering tool, are positioned odd number positioning and steering tool or even number by crane
It is put under water with steering tool, according to burst slug rod position, the positioning of adjustment odd number and steering tool or even number are positioned and led
To the direction of instrument, adjustment bolt, stationary positioned and steering tool are screwed；
(7) take out fuel rod by crane to extract and installation tool, install after drawing force measuring system, adjustment camera position
Put to burst slug rod location hole, slow movable fuel rod extract and installation tool to burst slug directly over, by instrument from
Body gravity is slowly moved downward, and when outer protection pipe enters odd bits pilot hole or even bit pilot hole, is adjusted camera, is delayed
Slowly move downward, when motion meets obstructions, give external force and push handle, confirm fuel rod completely into outer protection pipe and combustion
Charge bar gripping apparatus, closes and starts valve, locks fuel rod；
(8) slow lifting fuel rod extracts and reassembled the value of thrust shown on instrument, observation display, pulling force suddenly change
Value continues to lift up fuel rod and extracts and reassemble instrument when within ± 10%, watches display attentively, and observation pulling capacity change is extremely broken
Damage fuel rod extraction completely and be put into storage location, when the value of thrust suddenly change value shown on display is less than 10%, then say
Bright fuel rod gripping apparatus does not have fuel rod upper end plug, it is necessary to re-start promptly, when the value of thrust suddenly change shown on display
When value is more than 10%, then needs camera movement is checked whether it is fuel rod flexural deformation or rupture, accordingly arranged with taking
Apply；
(9) extracted by crane movable fuel rod and installation tool is to fresh fuel rod storage location, fuel rod gripping apparatus is stretched
Fresh fuel rod upper end plug is locked after going out, under hoisting tool to fresh fuel rod end plug be located at burst slug rod odd bits pilot hole or
Directly over even bit pilot hole, fresh fuel rod is reassembled, run into when instrument is descending by slow jenny by instrument self gravitation
During resistance, downward external force is given, fresh fuel rod is installed in place.
This programme can realize the dismounting and installation of upper pipe seat of fuel component in pool environment, according to PWR Fuel group
Part design feature, devises series of tools and is used, and establishes the fuel assembly technology of base dismounting under water, realizes water
Upper pipe seat of fuel component is dismounted in pool environment, and realizes the quick disintegration and installation of fuel assembly base, is burst slug
The disintegration and reparation of component provide precondition, are the utilization fuel element of economical rationality, improve fuel element utilization rate and provide
Important technical support.The technology can realize that the extraction of breakage and fresh fuel rod are installed in pool environment, improve combustion
Expect element utilization rate.Simultaneously according to PWR Fuel rod structure, devise a kind of fuel rod and extract and reassemble device, realize brokenly
Fuel rod is damaged quickly to extract and fresh fuel rod Fast Installation；According to PWR fuel assembly structure, a kind of parity bit combustion is devised
Charge bar is positioned and steering tool, realizes that fuel assembly optional position burst slug rod fixed point location is extracted and fresh fuel rod is determined
Point location is installed；Using drawing force measuring system, record burst slug rod extracts pulling capacity size in real time, reduces fuel rod and breaks
Split risk, it is ensured that fuel rod structural intergrity；Establish burst slug rod and extract and reassemble under water technology, realize damaged combustion
Charge bar is quickly extracted under water and fresh fuel rod is quickly reassembled.
According to base structure on PWR fuel assembly, a kind of upper base setting tool, base regular worker on this are devised
Tool includes support bar, and the bottom of support bar, which is fixed with support frame, support frame, is provided with brake and several pins, in support
Handle is provided with bar, and handle passes through support bar, the axis of handle and the axis of support bar are vertical, when using that pin is slow
In insertion in the corresponding hole of base, the handle of base setting tool is pushed so that brake is inserted into base, lead to
The polygon of multiple pins and brake formation is crossed so as to be locked to upper base, upper base spiral shell is avoided by restraining moment
Follow closely upper base deformation in disassembly process.
According to upper base bolt structure, a kind of upper base screw dismantling device is devised, the screw dismantling device includes interior
Compression lock is installed, the bottom of dismounting bar is provided with gripping apparatus, dismounts the outer wall set of bar at the top of the hollow dismounting bar in portion, dismounting bar
Conjunction has rotary handle and cylinder, and rotary handle is arranged between cylinder and compression lock, and cylinder is used with being connected inside dismounting bar
When first pass through cylinder open gripping apparatus, slow rotary screw dismantling device can naturally enter sleeve in and promptly the spiral shell
Nail, presses compression lock and screw is pressed into screw, the pneumatic knob of turn screw dismantling device closes gripping apparatus, passes through torque spanner
Change instrument torque, control moment realizes in underwater environment the dismounting and installation of base screw, it is to avoid screw and screw
Hole deforms.
According to base structure on PWR fuel assembly, a kind of upper base installation tool, base erector on this are devised
Tool includes mounting rod, and the bottom of mounting rod, which is fixed with to be provided with mounting bracket, mounting bracket, expresses pin and diagonal suspension hook, mounting rod
Outer wall on be provided with jettron, by the way that upper base installation tool to be moved to the surface of upper base, upper base when using
The pin of installation tool slowly in the upper corresponding hole of base of insertion, is pressed and managed in the jettron locking of base installation tool
Base installation tool in seat, lifting, upper base is removed from crude fuel component, by upper base installation tool constantly adjustment
Base position, finds the best position of base, and the jettron for pressing base installation tool puts down base, realizes
Upper base Fast Installation, it is to avoid upper base deforms.
According to upper base bolt structure, a kind of screw crimping tool is devised, the screw crimping tool includes inner hollow
Crimping bar, be provided with stamping machine, stamping machine in the bottom of crimping bar and be provided with weight, be provided with and tighten at the top of crimping bar
Screw, is sheathed with control cylinder on the outer wall of crimping bar, and control cylinder is connected with stamping machine, puts envelope silicon instrument when using
Put directly over the screw of mounting screw, screw crimping tool is inserted in screw, by controlling cylinder so that in stamping machine
Weight movement successively to each screw carry out crimping processing, by changing screw tip shapes, fixed fuel component guide pipe
Position.The torque of torque spanner is preferably 15N.m, according to the size of part in nuclear fuel assembly, when being dismounted, 15N.m
Torque be fully able to satisfaction and use.
Extract and installation tool includes being provided with the inner cylinder being coaxial therewith in the outer barrel of inner hollow, outer barrel, and inner cylinder
It can be moved along the axis of its own, one end of outer barrel is provided with retaining ring, and inner cylinder passes through retaining ring, and inner cylinder is away from locking
One end of ring is provided with fuel rod gripping apparatus；The drawing force measuring system includes the controller and pulling force sensor being connected with each other,
And pulling force sensor and inner cylinder are connected, and display is provided with controller.There is breakage when fuel rod is in cycle period, and fuel
Rod has strong anti-radioactivity in itself, and burst slug rod directly can not be changed artificially, and the fuel rod of this programme design is extracted and installed
Instrument, can realize that fuel rod is extracted and installed under water, and fuel rod gripping apparatus is tied according to PWR fuel assembly fuel rod upper end
Structure, the fuel rod upper end control instrument of design, realizes PWR Fuel rod by pneumatic actuation mode and captures and press from both sides under water
Hold.
The one end of outer barrel away from retaining ring is provided with protection pipe, and protection pipe is connected with outer barrel, and fuel rod gripping apparatus can be inserted
Enter and moved into protection pipe, protection pipe is inserted into extracting and reassembled in positioner and along the axis of its own
Move in direction；The center line of the center line of the protection pipe, the center line of fuel rod gripping apparatus and inner cylinder is overlapped.Protection pipe is to use
Protected in cartridge so that fuel rod gripping apparatus can only carry out grasping movement through protection pipe, and fuel rod gripping apparatus is in itself
It is existing structure, center line is subjected to coincidence design so that quick centring can be realized in crawl and installation.
The pneumatic control switch that retaining ring can be controlled to be opened and closed is provided with retaining ring；The inwall of the outer barrel is recessed
Several limitting casings, the outer wall of inner cylinder is cased with several position-arresting disks.Pneumatic control switch is the opening and closing process for controlling retaining ring, is led to
Locking inner cylinder and outer barrel are crossed, realization is moved integrally, protect fuel rod safety, greatly reduce and dropped in fuel rod extraction process
Risk.Because the length of cartridge is long, it easily produces when extracting and rocked, and this programme devises multiple limitting casings and spacing
Disk, limitting casing is the outer wall for protruding from outer barrel, when inner cylinder is moved along its own axis, the position-arresting disk energy of set on its external wall
Enough be pulled in limitting casing carry out it is a certain degree of spacing so that operating personnel can perceive the shift position of inner cylinder, now
It is accomplished by giving certain external force and ensures gripping apparatus completely into fuel rod upper end plug, continuing to move to inner cylinder will will be from limit to position-arresting disk
Removed in the frame of position, when being contacted again with next limitting casing, again operating personnel are pointed out with its shift position so that fuel rod
Extract distance can be perceived by operating personnel, come determine whether to move integrally or inner cylinder movement.
Extracting and reassemble positioner includes being provided with component guide housing above flexible guide plate, flexible guide plate, and
Component guide housing is fixed with flexible guide plate, and some fixed columns being parallel to each other are provided with above flexible guide plate, fixed
The bottom of post is vertically fixed on flexible guide plate, and component guide housing is arranged on fixed column between the region formed,
Positioning and steering tool are provided with above flexible guide plate, and the top of fixed column is inserted into positioning and steering tool, it is fixed
Position and steering tool are arranged on the surface of component guide housing.For the utilization fuel element of economical rationality, fuel original paper profit is improved
With rate, for the fuel assembly of damaged deformation, can pointedly it be repaired, with fresh fuel rod or other standby rods to it
Changed, improved the utilization ratio of nuclear fuel, while significantly reducing the probability of radioactive substance release, this is for being ensured
The safe operation of nuclear power plant is significant.But present fuel rod is extracted and carried out in installation process without special instrument
To neutralize positioning, cause to extract and reassemble to neutralize location difficulty.In order to smoothly realize that burst slug rod is extracted and reassembled, if
Positioner is counted, auxiliary burst slug rod extracts and reassembled instrument, realizes pair that breakage is quickly extracted and fresh fuel rod is installed
Neutralize positioning.
Fixed rack is provided with above flexible guide plate, component guide housing is arranged in fixed rack and and fixed station
Frame is fixed, wherein a fixed column passes through fixed rack, adjustment bolt is provided with fixed rack, and adjustment bolt is with passing through
The sidewall contact of the fixed column of fixed rack, and adjustment bolt passes through fixed rack, and screw, spiral shell are provided with fixed rack
Nail is contacted through fixed rack and with flexible guide plate.
Positioning and steering tool are divided into odd number positioning and steering tool or even number positioning and steering tool, the top of fixed column
Be inserted into odd number positioning and steering tool or even number positioning and steering tool in, odd number positioning and steering tool or even number positioning and
Steering tool is arranged on the surface of component guide housing.
Odd number is positioned and steering tool includes fixed guide plate, and fixed guide plate connects with the top of all fixed columns simultaneously
Connect, several odd bits pilot holes are provided with fixed guide plate；The quantity of the fixed guide plate is two pieces, and two pieces of fixations
Guide plate is parallel to each other, and one of fixed guide plate is arranged on the surface of another block of fixed guide plate, fixed guide plate it
Between be provided with support column, the two ends of support column are vertical with fixed guide plate respectively to be fixed, the fixed guide plate being arranged below with
The top connection of all fixed columns, odd bits pilot hole is arranged on two blocks of fixed guide plates, and protection pipe is inserted into
Moved into odd bits pilot hole and along the axis direction of odd bits pilot hole.
Even number is positioned and steering tool includes fixed guide plate, and fixed guide plate connects with the top of all fixed columns simultaneously
Connect, several even bit pilot holes are provided with fixed guide plate；The quantity of the fixed guide plate is two pieces, and two pieces of fixations
Guide plate is parallel to each other, and one of fixed guide plate is arranged on the surface of another block of fixed guide plate, fixed guide plate it
Between be provided with support column, the two ends of support column are vertical with fixed guide plate respectively to be fixed, the fixed guide plate being arranged below with
The top connection of all fixed columns, even bit pilot hole is arranged on two blocks of fixed guide plates, and protection pipe is inserted into
Moved into even bit pilot hole and along the axis direction of even bit pilot hole.
It is distributed according to fuel assembly fuel, devises the two kinds of burst slug rod of odd even and extract and reassemble under water positioning
Device, realizes the quick centring during fuel rod is extracted and reassembled, and quickly extracts and installs to provide for burst slug rod and determine
Position and guiding；According to PWR fuel assembly fuel rod characteristic distributions, odd even guide plate is devised, can be led by even or odd
To four orientation rotations of plate, realize 289 fuel rod optional position burst slug rods of fuel assembly with a small number of pilot holes and extract
With the positioning and guiding reassembled.
The present invention compared with prior art, has the following advantages and advantages：The present invention establishes fuel assembly water
Lower spike pulling technology, pulling capacity measurement part is installed on fuel rod replacing device, reflects that the pulling capacity of every fuel rod is big in real time
Small, fuel rod safety and structural intergrity in protection burst slug rod drawing process reduce fuel rod in drawing process and are broken
Risk, is that fuel assembly recovery technique is supported.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of upper base setting tool；
Fig. 2 is the structural representation of upper base screw dismantling device；
Fig. 3 is the partial schematic diagram of upper base screw dismantling device；
Fig. 4 is the structural representation of upper base installation tool；
Fig. 5 is the structural representation of screw crimping tool；
Fig. 6 is the partial schematic diagram of screw crimping tool；
Fig. 7 is extraction and the structural representation of installation tool；
Fig. 8 is progress odd bits hole positioning and the structural representation of guiding；
Fig. 9 is the structural representation of even number positioning and steering tool；
Figure 10 is the structural representation of drawing force measuring system.
Mark and corresponding parts title in accompanying drawing：
1- pins, 2- brakes, 3- handles, 4- support bars, 5- support frames, 6- rotary handles, 7- cylinders, 8- dismounting bars,
9- gripping apparatus, 10- mounting rods, 11- mounting brackets, the diagonal suspension hooks of 12-, 13- expresses pin, and 14- jettrons, 15- tightens screw,
16- controls cylinder, and 17- crimping bars, 18- stamping machines, 19- weights, 20- compresses lock, 21- pneumatic control switch, 22- pipelines, 23-
Inner cylinder, 24- fuel rod gripping apparatus, 25- outer barrels, 26- protection pipes, 27- limitting casings, 28- retaining rings, 29- position-arresting disks, 30- installation folders,
31- odd numbers are positioned and steering tool, 32- odd bits pilot holes, 33- fixed guide plates, 34- component guide housings, 35- fixed columns,
36- adjustment bolts, the flexible guide plates of 37-, 38- screws, 39- fixed racks, 40- support columns, the positioning of 41- even numbers and guiding work
Tool, 42- even bit pilot holes, 43- pulling force sensors, 44- controllers, 45- displays.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment and its explanation of the invention is only used for explaining the present invention, does not make
For limitation of the invention.
Embodiment：
As shown in Figures 1 to 10, a kind of fuel assembly spike pulling method under water, it has used base setting tool, spiral shell
Dismantling device, upper base installation tool, screw crimping tool, extraction and installation tool are followed closely, extracts and reassembles positioner, wherein
Upper base setting tool includes support bar 4, and the bottom of support bar 4, which is fixed with support frame 5, support frame 5, is provided with the He of brake 2
At least two pin 1, is provided with handle 3 on support bar 4, and handle 3 passes through support bar 4, the axis of handle 3 and support bar 4
Axis is vertical；Screw dismantling device includes the dismounting bar 8 of inner hollow, and the top of dismounting bar 8 is provided with compression lock 20, dismounts bar
8 bottom is provided with gripping apparatus 9, and the outer wall of dismounting bar 8 is sheathed with rotary handle 6 and cylinder 7, and rotary handle 6 is arranged on cylinder 7
Between compression lock 20, cylinder 7 is connected with the inside of dismounting bar 8；Upper base installation tool includes mounting rod 10, the bottom of mounting rod 10
Portion, which is fixed with to be provided with mounting bracket 11, mounting bracket 11, expresses pin 13 and diagonal suspension hook 12, is set on the outer wall of mounting rod 10
There is jettron 14, while may be provided for placing the screw storage barrel of screw；Screw crimping tool includes inner hollow
Crimping bar 17, be provided with stamping machine 18, stamping machine 18 in the bottom of crimping bar 17 and be provided with weight 19, crimp the top of bar 17
Portion, which is provided with, tightens screw 15, and control cylinder 16, and control cylinder 16 and stamping machine 18 are sheathed with the outer wall of crimping bar 17
Connection；Drawing force measuring system includes the controller 44 and pulling force sensor 43 being connected with each other, and pulling force sensor 43 and inner cylinder
Display 45 is provided with 23 connections, controller 44, display 45 is connected by data wire with pulling force sensor 43.
Screw storage barrel is moved by crane during specific works, and is placed on around upper pipe seat of fuel component suitable position,
Fixing screws storage barrel；Then moved by crane directly over the upper supreme base of base setting tool, by upper base setting tool
Pin 1 slowly in the upper corresponding hole of base of insertion, push the handle 3 of base setting tool so that brake 2 is inserted into
Upper base is locked in base；Work is dismounted directly over the supreme base of crane moving sleeve screw dismantling device, and in telescope-srew
Connection balancer between tool and crane so that telescope-srew dismantling device is using will not rock, the gripping apparatus 9 of screw dismantling device
It is inserted into base any one screw hole, opens and compress 20 turn rotary handles 6 of lock and make it that cylinder 7 opens screw dismounting work
Has a gripping apparatus 9 of lower end, slow rotary screw dismantling device can naturally enter in sleeve and the promptly screw, by pushing
It is tight to lock 20 to close gripping apparatus 9, rotated with the torque spanner for being set as 15N.m to same direction, upper base fixing screws are revolved
Screw is put into screw storage barrel by mobile screw dismantling device after going out, and repeats above-mentioned screw disassembling step, complete to 24 screws
Portion is removed and placed in screw storage device；Telescope-srew dismantling device is removed with crane, upper base installation tool is moved to
The surface of upper base, the pin 13 of expressing of upper base installation tool is slowly inserted in the upper corresponding hole of base, presses base
The upper base of the locking of jettron 14 of installation tool, upper base installation tool is lifted with crane, by upper base from crude fuel component
It is middle to remove；The upper base dismantled is moved to the surface of fuel assembly to be installed with crane, passes through upper base erector
The upper base position of tool constantly adjustment, finds the best position of base so that on the screw and fuel assembly in upper base
Screw correspond, the jettron 14 for pressing base installation tool puts down base, then removes upper base erector
Screw dismantling device, the surface of new screw storage device is moved to crane, is firmly grasped with the gripping apparatus of screw dismantling device by tool
Wherein one screw, and the screw is inserted in corresponding screw, open the jettron 14 of screw dismantling device, locking screw
Nail, the spanner for being 15N.m with torque rotates screw dismantling device and rotated to same direction, repeats above-mentioned screw installation steps,
Until 24 new screws are arranged on into upper base screwhole position；After installation, screw dismantling device is removed with crane, by hanging
Car is placed on silicon instrument is sealed directly over the screw of mounting screw, and screw crimping tool is inserted in screw successively to each spiral shell
Nail carries out crimping processing.
After upper pipe seat of fuel component removal, according to burst slug rod position, the positioning of selection odd number and steering tool 31 or
Person's even number is positioned and steering tool 41, is positioned odd number positioning and steering tool 31 or even number and steering tool 41 by crane
It is put under water, according to burst slug rod position, the positioning of adjustment odd number and steering tool 31 or even number positioning and steering tool 41
Direction, it is ensured that burst slug rod position and pilot hole it is readily identified, screw adjustment bolt 36, stationary positioned and steering tool；
Extraction and installation tool can realize that burst slug rod is extracted and installed in pool environment, install after drawing force measuring system,
By being positioned to burst slug rod, camera angle is adjusted, camera is to be used to be monitored whole process, auxiliary behaviour
Make whether in place personnel judge motion, it is arranged on outside flexible guide plate 37, extracted by the slow movable fuel rod of crane and
Directly over installation tool to burst slug rod, slowly moved downward by instrument self gravitation, when outer protection pipe 26 enters strange
Numerical digit pilot hole 32 or even bit pilot hole 42, adjust camera, slowly move downward, when motion meets obstructions, give
External force pushes handle, confirms that fuel rod, completely into outer protection pipe 26, under steering tool auxiliary, opens the gas of retaining ring 28
Dynamic controlling switch 21, moves down inner cylinder 23 to a certain restraining position of outer barrel 25, and give certain external force, it is ensured that fuel rod gripping apparatus
24 completely into fuel rod upper end plug, and adjusts camera angle confirmation, then controls fuel rod gripping apparatus by gas path pipe 22
24 locking fuel rod upper end plugs, crane is to move inner cylinder 23 by being enclosed within the installation folder 30 of the termination of inner cylinder 23, when inner cylinder 23 is pushed up
Portion be moved to can not move or position-arresting disk 29 and limitting casing 27 between have an obvious masterpiece used time, the control lock of pneumatic control switch 21
Tight ring 28 will lock inner cylinder 23 and outer barrel 25, lift whole instrument and move upwards, and slow lifting fuel rod extracts and reassembled instrument,
The value of thrust shown on observation display 45, tension variations value shows that fuel rod gripping apparatus 24 is to fire when within ± 10%, then
Charge bar is firmly grasped and illustrates that no firmly grasp is fired in can normally pull out the value of thrust shown on process, display 45 less than 10%
Charge bar, then needed to reinsert promptly, and strength is likely to be more than 10% and causes very much fuel rod rupture greatly, it is necessary to dollying
Head observation fuel rod situation, if bending ruptures, combustion is continued to lift up after reaching needs in order to the progress processing that takes measures
Charge bar is extracted and reassembles instrument, watches display 45 attentively, and observation pulling capacity change is extracted and is put into bit of storage completely to burst slug rod
Put；In fresh fuel rod storage location, by monitoring camera, under steering tool auxiliary, the pneumatic control of retaining ring 28 is opened
Switch 21, move down inner cylinder 23 to the restraining position of outer barrel 25, and give certain external force, it is ensured that fuel rod gripping apparatus 24 completely into
Fresh fuel rod upper end plug, and camera angle confirmation is adjusted, then control fuel rod gripping apparatus 24 to lock by gas path pipe 22 and fire
Charge bar upper end plug, when the top of inner cylinder 23 be moved to can not move or position-arresting disk 29 and limitting casing 27 between there is obvious power to act on
When, the control of pneumatic control switch 21 retaining ring 28 will lock end plug position under inner cylinder 23 and outer barrel 25, hoisting tool to fresh fuel rod
Directly over burst slug rod odd bits pilot hole 32 or even bit pilot hole 42, slow jenny, by instrument itself
Gravity reassembles fresh fuel rod, when instrument is descending to meet obstructions, gives downward external force, fresh fuel rod is installed in place, combustion
Charge bar gripping apparatus 24, storage location is placed by instrument.
As shown in figure 8, for the pilot hole of odd bits, after upper pipe seat of fuel component is removed, according to Y Angle Positions, it is determined that broken
Fuel rod position, the positioning of selection odd number and steering tool 31 are damaged, according to burst slug rod position rotary steering plate orientation, by hanging
Car places odd number positioning and steering tool 31 directly over fuel assembly guide housing 34, and constantly adjustment position, and odd number is positioned
Damaged fuel assembly position is arranged on steering tool 31, adjustment bolt 36 is screwed, adjusted and tightening screw 38, component guide housing
34 and the position of flexible guide plate 37, realize that centering is operated, adjust camera, according to burst slug rod position, determine that odd bits are led
To the position in hole 32.The quick centring during fuel rod is extracted and reassembled is realized, is the burst slug of odd bits pilot hole
Rod is quickly extracted and fresh fuel rod is installed and provides positioning and be oriented to.
As shown in figure 9, for the pilot hole of even bit, after upper pipe seat of fuel component is removed, according to Y Angle Positions, it is determined that broken
Fuel rod position, the positioning of selection even number and steering tool 41 are damaged, according to burst slug rod position rotary steering plate orientation, by hanging
Car places even number positioning and steering tool 41 directly over fuel assembly guide housing 34, and constantly adjustment position, and even number is positioned
Damaged fuel assembly position is arranged on steering tool 41, adjustment bolt 36 is screwed, adjusted and tightening screw 38, component guide housing
34 and the position of flexible guide plate 37, realize that centering is operated, adjust camera, according to burst slug rod position, determine that even bit is led
To the position in hole 42.Example realizes the quick centring during fuel rod is extracted and reassembled, and is the damaged combustion of even bit pilot hole
Charge bar is quickly extracted and fresh fuel rod is installed and provides positioning and be oriented to.
The present invention is that a kind of burst slug rod extracts and reassembled under water technology, belongs to nuclear fuel cycle technical field.It is built
Fuel assembly spike pulling technology under water has been found, every fuel assembly pulling capacity size can have been measured in pool environment, protection is damaged
Fuel rod safety and structural intergrity in fuel rod drawing process, technical support is provided for damaged fuel assembly reparation.
Above-described embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modifications, equivalent substitutions and improvements done etc. all should be included
Within protection scope of the present invention.
Claims (10)
1. a kind of fuel assembly spike pulling method under water, it is characterised in that comprise the following steps：
(1) in movement the supreme base of base setting tool surface, the pin of upper base setting tool is inserted into upper base pair
In the hole answered, base in the handle of base setting tool, locking is pushed；
(2) directly over the mobile supreme base of screw dismantling device, the lower end of screw dismantling device be inserted into base any one
In screw hole, turn rotary handle control cylinder opens the gripping apparatus of screw dismantling device lower end, and rotary screw dismantling device makes it
It can naturally enter in sleeve and firmly grasp the screw, the compression lock for pressing screw dismantling device closes gripping apparatus, uses torque spanner
Rotate screw dismantling device to rotate to same direction, screw dismantling device is moved after upper base fixing screws are screwed out by screw
It is put into screw storage device, repeats above-mentioned screw disassembling step, screw storage device is all removed and placed in all screws
In；
(3) telescope-srew dismantling device is removed, upper base installation tool is moved to the surface of upper base, upper base erector
Expressing in the upper corresponding hole of base of pin insertion for tool, presses the upper base of jettron locking of base installation tool, lifting
Upper base installation tool, upper base is removed from crude fuel component；
(4) the upper base dismantled is moved to the surface of fuel assembly to be installed, it is continuous by upper base installation tool
Base position in adjustment, finds the best position of base, and the jettron for pressing base installation tool puts down pipe
Seat, then removes upper base installation tool, screw dismantling device is moved to the surface of new screw storage device, torn open with screw
The gripping apparatus of holding tool firmly grasps wherein one screw, and the screw is inserted in corresponding screw, opens the gas of screw dismantling device
Dynamic switch, lock-screw rotates screw dismantling device with torque spanner and rotated to same direction, repeats above-mentioned screw and install step
Suddenly, until the new screw in all screw holes is all arranged on into upper base screwhole position；
(5) after installation, screw dismantling device is removed, silicon instrument will be sealed and be placed on directly over the screw of mounting screw, will
Crimping processing is carried out to each screw successively in screw crimping tool insertion screw；
(6) according to burst slug rod position, selecting extraction and the odd number reassembled in positioner in positioning and steering tool are positioned
With steering tool (31) or even number positioning and steering tool (41), by crane by odd number positioning and steering tool (31) or
Even number is positioned and steering tool (41) is put under water, according to burst slug rod position, the positioning of adjustment odd number and steering tool (31)
Or the direction of even number positioning and steering tool (41), screw adjustment bolt (36), stationary positioned and steering tool；
(7) take out fuel rod to extract and installation tool, install after drawing force measuring system, adjustment camera position to burst slug
Rod location hole, movable fuel rod is extracted and installation tool is to burst slug surface, is slowly transported downwards by instrument self gravitation
Dynamic, when outer protection pipe (26) enters odd bits pilot hole (32) or even bit pilot hole (42), adjustment camera is transported downwards
It is dynamic, when motion meets obstructions, give external force and push handle, confirm fuel rod completely into outer protection pipe (26) and fuel rod
Gripping apparatus (24), closes and starts valve, locks fuel rod；
(8) lifting fuel rod extracts and reassembled the value of thrust shown on instrument, observation display (45), and pulling force suddenly change value exists
When within ± 10%, continue to lift up fuel rod and extract and reassemble instrument, watch display (45) attentively, observation pulling capacity change is extremely broken
Damage fuel rod extraction completely and be put into storage location；
(9) movable fuel rod is extracted and installation tool is to fresh fuel rod storage location, is locked after fuel rod gripping apparatus (24) is stretched out
End plug is located at burst slug rod odd bits pilot hole (32) or even number under fresh fuel rod upper end plug, hoisting tool to fresh fuel rod
Directly over position pilot hole (42), fresh fuel rod is reassembled, run into when instrument is descending by mobile lifting device by instrument self gravitation
During resistance, downward external force is given, fresh fuel rod is installed in place.
2. a kind of fuel assembly according to claim 1 spike pulling method under water, it is characterised in that the upper base regular worker
Tool includes support bar (4), the bottom of support bar (4) be fixed with support frame (5), support frame (5) be provided with brake (2) and if
A dry pin (1), is provided with handle (3) on support bar (4), and handle (3) passes through support bar (4), the axis of handle (3) and
The axis of support bar (4) is vertical.
3. a kind of fuel assembly according to claim 1 spike pulling method under water, it is characterised in that the screw dismantling device
Compression lock (20) is installed, the bottom of dismounting bar (8) is provided with the top of the dismounting bar (8) including inner hollow, dismounting bar (8)
Gripping apparatus (9), the outer wall of dismounting bar (8) is sheathed with rotary handle (6) and cylinder (7), and rotary handle (6) is arranged on cylinder (7)
Between compression lock (20), cylinder (7) inside dismounting bar (8) with connecting.
4. a kind of fuel assembly according to claim 1 spike pulling method under water, it is characterised in that the upper base erector
Tool includes mounting rod (10), and the bottom of mounting rod (10), which is fixed with to be provided with mounting bracket (11), mounting bracket (11), expresses pin
(13) and diagonal suspension hook (12), it is provided with jettron (14) on the outer wall of mounting rod (10).
5. a kind of fuel assembly according to claim 1 spike pulling method under water, it is characterised in that the screw crimping tool
Crimping bar (17) including inner hollow, is provided with stamping machine (18), stamping machine (18) in the bottom of crimping bar (17) and sets
Have to be provided with the top of weight (19), crimping bar (17) and tighten screw (15), control is sheathed with the outer wall of crimping bar (17)
Cylinder (16), and control cylinder (16) to be connected with stamping machine (18).
6. a kind of fuel assembly according to claim 1 spike pulling method under water, it is characterised in that the extraction and erector
Tool includes being provided with the inner cylinder (23) being coaxial therewith in the outer barrel (25) of inner hollow, outer barrel (25), and inner cylinder (23) can
Moved along the axis of its own, one end of outer barrel (25) is provided with retaining ring (28), and inner cylinder (23) passes through retaining ring (28),
The one end of inner cylinder (23) away from retaining ring (28) is provided with fuel rod gripping apparatus (24)；Drawing force measuring system includes what is be connected with each other
Controller (44) and pulling force sensor (43), and pulling force sensor (43) and inner cylinder (23) connection, controller are provided with (44)
Display (45)；The one end of outer barrel (25) away from retaining ring (28) is provided with protection pipe (26), and protection pipe (26) and outer barrel
(25) connect, fuel rod gripping apparatus (24) is inserted into protection pipe (26) moving, and protection pipe (26) is inserted into taking out
Take and reassemble in positioner and moved along the axis direction of its own；The center line of protection pipe (26), fuel rod gripping apparatus
(24) center line and the center line of inner cylinder (23) is overlapped；Being provided with retaining ring (28) can control retaining ring (28) to be opened and closed
Pneumatic control switch (21)；The inwall of outer barrel (25) is recessed several limitting casings (27), and the outer wall of inner cylinder (23) is cased with
Several position-arresting disks (29).
7. a kind of fuel assembly according to claim 1 spike pulling method under water, it is characterised in that the extraction and reassemble it is fixed
Position device includes being provided with component guide housing (34) above flexible guide plate (37), flexible guide plate (37), and component is oriented to
Frame (34) is fixed with flexible guide plate (37), and some fixed columns being parallel to each other are provided with above flexible guide plate (37)
(35), the bottom of fixed column (35) is vertically fixed on flexible guide plate (37), and component guide housing (34) is arranged on fixed column
(35) between the region formed, positioning and steering tool, and fixed column are provided with above flexible guide plate (37)
(35) top is inserted into positioning and steering tool, and positioning and steering tool are arranged on the surface of component guide housing (34)；
Fixed rack (39) is provided with above the flexible guide plate (37), component guide housing (34) is arranged in fixed rack (39)
And it is fixed with fixed rack (39), wherein a fixed column (35) passes through fixed rack (39), set on fixed rack (39)
Adjustment bolt (36), and the sidewall contact of adjustment bolt (36) and the fixed column (35) through fixed rack are equipped with, and is adjusted
Bolt (36) passes through fixed rack (39), and screw (38) is provided with fixed rack (39), and screw (38) passes through fixed rack
(39) and with flexible guide plate (37) contact.
8. a kind of fuel assembly according to claim 7 spike pulling method under water, it is characterised in that the positioning and be oriented to work
Tool is divided into odd number positioning and steering tool (31) or even number positioning and steering tool (41), and the top of fixed column (35) is inserted into very
Number positioning is with steering tool (31) or even number positioning and steering tool (41), and odd number positioning and steering tool (31) or even number are determined
Position and steering tool (41) are arranged on the surface of component guide housing (34).
9. a kind of fuel assembly according to claim 8 spike pulling method under water, it is characterised in that the odd number positioning and lead
Include fixed guide plate (33), fixed guide plate (33) to instrument (31) while being connected with the top of all fixed columns (35),
Several odd bits pilot holes (32) are provided with fixed guide plate (33)；The quantity of the fixed guide plate (33) is two pieces,
And two pieces of fixed guide plates (33) are parallel to each other, one of fixed guide plate (33) is arranged on another piece of fixed guide plate (33)
Surface, be provided with support column (40) between fixed guide plate (33), the two ends of support column (40) respectively with fixed guide plate
(33) vertical fixed, the fixed guide plate (33) being arranged below is connected with the top of all fixed columns (35), and odd bits are led
It is arranged to hole (32) on two pieces of fixed guide plates (33), and protection pipe (26) is inserted into odd bits pilot hole (32)
And moved along the axis direction of odd bits pilot hole (32).
10. a kind of fuel assembly according to claim 8 spike pulling method under water, it is characterised in that the even number positioning and
Steering tool (41) includes fixed guide plate (33), fixed guide plate (33) while connecting with the top of all fixed columns (35)
Connect, several even bit pilot holes (42) are provided with fixed guide plate (33)；The quantity of the fixed guide plate (33) is two
Block, and two pieces of fixed guide plates (33) are parallel to each other, one of fixed guide plate (33) is arranged on another block of fixed guide plate
(33) support column (40) is provided between surface, fixed guide plate (33), the two ends of support column (40) are led with fixation respectively
Vertically fixed to plate (33), the fixed guide plate (33) being arranged below is connected with the top of all fixed columns (35), even number
Position pilot hole (42) is arranged on two pieces of fixed guide plates (33), and protection pipe (26) is inserted into even bit pilot hole
(42) moved in and along the axis direction of even bit pilot hole (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610519530.6A CN106128530B (en) | 2016-07-05 | 2016-07-05 | A kind of fuel assembly spike pulling method under water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610519530.6A CN106128530B (en) | 2016-07-05 | 2016-07-05 | A kind of fuel assembly spike pulling method under water |
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| Publication Number | Publication Date |
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| CN106128530A CN106128530A (en) | 2016-11-16 |
| CN106128530B true CN106128530B (en) | 2017-07-11 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106448770B (en) * | 2016-11-25 | 2017-10-24 | 中国核动力研究设计院 | A kind of presurized water reactor irradiated fuel assembly disintegration prosthetic device and its renovation technique under water |
| CN109979629A (en) * | 2017-12-27 | 2019-07-05 | 核动力运行研究所 | A kind of underwater attaching/detaching apparatus of upper pipe seat of fuel component |
| CN109660758B (en) * | 2018-11-26 | 2020-10-13 | 中广核核电运营有限公司 | Underwater wireless high-definition photographing device and system for nuclear power station reactor core |
| CN111354492A (en) * | 2018-12-21 | 2020-06-30 | 核动力运行研究所 | Load protection device and method for single-rod replacement operation of fuel assembly |
| CN113188789B (en) * | 2021-04-26 | 2022-02-01 | 中国核动力研究设计院 | Electric measurement and control device and method suitable for manual valve action test |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200997319Y (en) * | 2006-11-30 | 2007-12-26 | 秦山核电公司 | Reactor fuel load-unloader |
| CN101271738B (en) * | 2008-04-25 | 2011-11-09 | 上海核工程研究设计院 | Clamping head for fuel rod replacing device |
| CN201622860U (en) * | 2009-12-09 | 2010-11-03 | 中科华核电技术研究院有限公司 | Fuel operating device |
| CN102142289B (en) * | 2010-12-23 | 2012-11-28 | 中国原子能科学研究院 | Underwater gripping apparatus for fuel assembly |
| CN202307165U (en) * | 2011-10-13 | 2012-07-04 | 秦山核电有限公司 | Positioning device for accurately positioning fuel rod replacement tool on drawn fuel rods |
| CN102522131B (en) * | 2011-12-20 | 2014-02-12 | 中国核动力研究设计院 | Quick-change grabbing fixture type fuel rod remote grabbing tool |
| CN102543231B (en) * | 2011-12-20 | 2014-10-08 | 中国核动力研究设计院 | Fuel subassembly disassembling device |
| JP2014240781A (en) * | 2013-06-11 | 2014-12-25 | 日立Ｇｅニュークリア・エナジー株式会社 | Method for removing nuclear fuel material in nuclear power plant |
| CN105023623B (en) * | 2015-06-24 | 2017-10-10 | 中广核核电运营有限公司 | Nuclear fuel assembly prosthetic device and method |
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