CN102376375B - Underwater operation device for grabbing end part fitting of nuclear fuel assembly - Google Patents
Underwater operation device for grabbing end part fitting of nuclear fuel assembly Download PDFInfo
- Publication number
- CN102376375B CN102376375B CN2011103098101A CN201110309810A CN102376375B CN 102376375 B CN102376375 B CN 102376375B CN 2011103098101 A CN2011103098101 A CN 2011103098101A CN 201110309810 A CN201110309810 A CN 201110309810A CN 102376375 B CN102376375 B CN 102376375B
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- China
- Prior art keywords
- outer sleeve
- fuel assembly
- lower outer
- end fitting
- core bar
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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
Abstract
The invention relates to the technical field of a grabbing operation device of an end part fitting of a damaged fuel assembly after irradiation in the repairing process, and in particular discloses an underwater operation device for grabbing the end part fitting of a nuclear fuel assembly. The device comprises an upper outer sleeve, a core rod and a lower outer sleeve; a retainer ring is arranged between the upper outer sleeve and the lower outer sleeve which can rotate respectively; the opposite angle of the sleeve wall of the lower outer sleeve is provided with a limiting hole; the core rod penetrates through the upper outer sleeve and the lower outer sleeve; a cylindrical pin penetrates through the limiting hole and the core rod on the lower outer sleeve, and is fixed on the core rod; the lower end of the core rod extends out of the lower outer sleeve and a 'cross-shaped' structural grab head is fixed on the lower end of the core rod. The device can freely pass in and out the end part fitting, and can clamp the end part fitting after rotating for certain angle; and simultaneously, the limiting hole on the lower outer sleeve can ensure the rotation angle and the lifting height of the core rod and the grab head, the device is convenient to operate, the state of the device is convenient to confirm, and the underwater grabbing problem of the end part fitting of the neclear fuel assembly is solved.
Description
Technical field
The invention belongs to the end fitting grasping manipulation device technique field in the damaged fuel assembly repair process after irradiation, be specifically related to a kind of underwater operating device for crawl nuclear fuel assembly end fitting.
Background technology
Nuclear power plant reloads in process, sometimes find that multiplexing fuel rod breakage and spacer grid of fuel assembly coaming plate have injury event in various degree, after irradiation, fuel assembly appearance breakage all produces significant impact to power plant's Operation safety, economy, refuelling scheme and refueling outage duration.The damaged leakage of fuel rod can cause radioactive fission product to leak in a circuit cools agent, cause increase and the staff of system's radioactive level to accept unnecessary radiation dose, damaged fuel assembly considers that the risk control of security of operation does not allow again to enter stack operation in principle.After irradiation, the local slight damage of spacer grid of fuel assembly coaming plate refers to the local slight damage of the peripheral coaming plate of screen work, outer the sticking up of indivedual guide vane distortion.The local slight damage of grid spacer coaming plate, the outer fuel assembly that sticks up of guide vane distortion are in loading and unloading material process, be easy to produce with adjacent fuel assembly and block, scrape, draw, cause the mutual hook damage of adjacent fuel assembly, make the loading and unloading material that greatly difficulty occur, and be in operation also may be to the grid spacer injury of adjacent fuel assembly, threaten the safe operation of fuel assembly, therefore, the local slight damage of grid spacer coaming plate, the outer assembly that sticks up of guide vane distortion could use after must proofreading and correct.After irradiation, spacer grid of fuel assembly coaming plate major injury refers to that the screen work coaming plate seriously tears, sticks up and the guide vane gross distortion outward, this major injury is except making the loading and unloading material that greatly difficulty occur, also easily cause fuel list rod that wear phenomenon occurs in the middle of operation, if these assemblies are not processed, in view of the consideration of safety will not allow back heap multiplexing.
Therefore, repair under water damaged fuel assembly after irradiation., therefore to check and the refuelling rod by assigning fuel rod to form in skeleton structure due to fuel assembly, must dismantle end fitting by dismounting skeleton nut, thereby take, recombinate skeleton structure apart.In this process, need to carry out the underwater grasping extract operation to the nuclear fuel assembly end fitting.
Summary of the invention
The object of the present invention is to provide a kind of underwater operating device for crawl nuclear fuel assembly end fitting, can solve the crawl problem under water of nuclear fuel assembly end fitting.
technical scheme of the present invention is as follows: a kind of underwater operating device for crawl nuclear fuel assembly end fitting, comprise outer sleeve, core bar and lower outer sleeve, be provided with back-up ring between upper outer sleeve and lower outer sleeve, can rotate respectively, lower outside sleeve wall diagonal angle has spacing hole, core bar runs through outer sleeve and lower outer sleeve, straight pin passes spacing hole and the core bar on lower outer sleeve, and fix with core bar, the core bar lower end is stretched out lower outer sleeve and is fixed with the grappling fixture of " cross " type structure, its four tops are contactless in advance and retreat position and end fitting, and rotate to an angle when being in " loaded " position at grappling fixture, the slab construction at four angles of end fitting can be blocked in four tops of grappling fixture.
Described core bar has one section bulge-structure that is threaded structure in upper outer sleeve, and is complementary with female thread structure in upper outer sleeve.
Described lower outer sleeve lower end is fixed with the positioning element of slab construction, and is provided with the register pin of ladder cylinder table shape at positioning element lower surface diagonal position.
Described spacing hole is square opening, and the aperture of spacing hole is greater than the diameter of straight pin.
The upper end that described core bar stretches out outer sleeve is fixed with bail handle.
Remarkable result of the present invention is: a kind of underwater operating device for crawl nuclear fuel assembly end fitting of the present invention uses grappling fixture, can free in and out end fitting, and can block end fitting after rotating to an angle; Simultaneously, the spacing hole on lower outer sleeve can guarantee the anglec of rotation and the hoisting depth of core bar and grappling fixture to facilitate the operation of this device and the confirmation of unit state, has solved the crawl problem under water of nuclear fuel assembly end fitting.
Description of drawings
Fig. 1 is a kind of underwater operating device structural representation for crawl nuclear fuel assembly end fitting of the present invention;
Fig. 2 is Fig. 1 partial enlarged drawing;
Fig. 3 is A-A view in Fig. 2;
Fig. 4 is of the present invention a kind of for the underwater operating device grappling fixture of crawl nuclear fuel assembly end fitting and the position view of end fitting;
In figure: 1, handle; 2, upper outer sleeve; 3, core bar; 4, back-up ring; 5, lower outer sleeve; 6, straight pin; 7, positioning element; 8, grappling fixture; 9, spacing hole; 10, end fitting; 11, dowel hole; 12, advance and retreat position; 13, " loaded " position.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
as shown in Fig. 1～4, a kind of underwater operating device for crawl nuclear fuel assembly end fitting, comprise outer sleeve 2, core bar 3, lower outer sleeve 5, grappling fixture 8, wherein, upper outer sleeve 2 is tubular structure with lower outer sleeve 5, back-up ring 4 is installed between them, outer sleeve 2 and lower outer sleeve 5 can be rotated respectively, core bar 3 runs through outer sleeve 2 and lower outer sleeve 5, its upper end that passes outer sleeve 2 is fixed with bail handle 1, its lower end that passes lower outer sleeve 5 is fixed with grappling fixture 8, and core bar 3 has one section bulge-structure that is threaded structure that is complementary with upper outer sleeve 2 internal threads in upper outer sleeve 2, lower outer sleeve 5 barrel diagonal angles, upper end have spacing hole 9, straight pin 6 passes spacing hole 9 and the core bar 3 on lower outer sleeve 5, and fixing with core bar 3, by the scope of activities of straight pin 6 in spacing hole 9, the scope that restriction core bar 3 rotates and moves up and down with respect to lower outer sleeve 5, lower outer sleeve 5 lower ends are fixed with positioning element 7, positioning element 7 is slab construction, and the register pin of ladder cylinder table shape is installed at the lower surface diagonal position, and the register pin on positioning element 7 can extend in dowel hole in end fitting 10, as shown in Figure 4, end fitting 10 is the square box body structure, and extend one section slab construction that has dowel hole 11 at four angle centers, the fixing grappling fixture 8 in core bar 3 lower ends is " cross " type structure, its four tops can be contactless at advance and retreat 12 places, position and end fitting 10, and rotate to an angle when being in " loaded " position 13 at grappling fixture 8, the slab construction that end fitting 10 4 angles have dowel hole 11 can be blocked in four tops of grappling fixture 8.
the specific works process of a kind of underwater operating device for grasping the nuclear fuel assembly end fitting of the present invention is: in conjunction with underwater video equipment, with the dowel hole 11 on the aligning of the register pin in positioning element 7 end fitting 10, confirm that grappling fixture 8 is in 12 places, position that advance and retreat, and with the single unit system slow decreasing, until this device steadily is seated on the fuel assembly end fitting 10 that needs crawl, be that positioning element 7 is seated on end fitting 10, support whole device, and the register pin on positioning element 7 extend in dowel hole 11, make lower outer sleeve 5 keep fixing, rotating handles 1, thereby drive core bar 3 and handgrip 8 rotations, until can't rotate, the straight pin 6 that namely passes core bar 3 has turned to opposite side from a side of spacing hole, at this moment, grappling fixture 8 is in " loaded " position 13, fixedly core bar 3, and the upper outer sleeve 2 of rotation, outer sleeve 2 drives core bar 3 risings until can't rotate again, at this moment, straight pin 6 has moved the top from the bottom of spacing hole 9, four tops of grappling fixture 8 are the slab construction at clamping and positioning pin-and-hole 11 places, realized the underwater grasping extract operation to the nuclear fuel assembly end fitting.
Claims (5)
1. underwater operating device that is used for crawl nuclear fuel assembly end fitting, comprise outer sleeve (2), core bar (3) and lower outer sleeve (5), be provided with back-up ring between upper outer sleeve (2) and lower outer sleeve (5), can rotate respectively, it is characterized in that: lower outer sleeve (5) barrel diagonal angle has spacing hole (9), core bar (3) runs through outer sleeve (2) and lower outer sleeve (5), straight pin (6) passes spacing hole (9) and the core bar (3) on lower outer sleeve (5), and fixing with core bar (3), core bar (3) lower end is stretched out lower outer sleeve (5) and is fixed with the grappling fixture (8) of " cross " type structure, its four tops are located with end fitting (10) contactless in advance and retreat positions (12), and rotate to an angle when being in " loaded " position (13) at grappling fixture (8), the slab construction at (10) four angles of end fitting can be blocked in four tops of grappling fixture (8).
2. a kind of underwater operating device for crawl nuclear fuel assembly end fitting according to claim 1, it is characterized in that: described core bar (3) has one section bulge-structure that is threaded structure in upper outer sleeve (2), and is complementary with female thread structure in upper outer sleeve (2).
3. a kind of underwater operating device for crawl nuclear fuel assembly end fitting according to claim 1, it is characterized in that: described lower outer sleeve (5) lower end is fixed with the positioning element (7) of slab construction, and is provided with the register pin of ladder cylinder table shape at positioning element (7) lower surface diagonal position.
4. a kind of underwater operating device for crawl nuclear fuel assembly end fitting according to claim 1, it is characterized in that: described spacing hole (9) is square opening, and the aperture of spacing hole (9) is greater than the diameter of straight pin (6).
5. according to claim 1～4 described any one are used for the underwater operating device of crawl nuclear fuel assembly end fitting, and it is characterized in that: the upper end that described core bar (3) stretches out outer sleeve (2) is fixed with bail handle (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103098101A CN102376375B (en) | 2011-10-13 | 2011-10-13 | Underwater operation device for grabbing end part fitting of nuclear fuel assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103098101A CN102376375B (en) | 2011-10-13 | 2011-10-13 | Underwater operation device for grabbing end part fitting of nuclear fuel assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102376375A CN102376375A (en) | 2012-03-14 |
| CN102376375B true CN102376375B (en) | 2013-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103098101A Active CN102376375B (en) | 2011-10-13 | 2011-10-13 | Underwater operation device for grabbing end part fitting of nuclear fuel assembly |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474112B (en) * | 2012-06-08 | 2016-05-18 | 中国核动力研究设计院 | Reactor core internals lifting device |
| CN103871533B (en) * | 2012-12-17 | 2016-10-05 | 核动力运行研究所 | Finger sleeve waste material storage container transporter |
| 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2737676Y (en) * | 2004-10-26 | 2005-11-02 | 元贝实业股份有限公司 | Strap pressing device for bundling machine |
| CN202373315U (en) * | 2011-10-13 | 2012-08-08 | 秦山核电有限公司 | Underwater operating device for gripping end fittings of nuclear fuel assembly |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1066434A (en) * | 1977-07-11 | 1979-11-13 | Peter Isaac | Method and apparatus for positioning and ejecting fuel element bundles in and from a downstream end of a horizontally extending fuel channel |
| US7239683B2 (en) * | 2003-11-17 | 2007-07-03 | Framatome Anp, Inc. | Fuel assembly nozzleless handling tool and method |
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2011
- 2011-10-13 CN CN2011103098101A patent/CN102376375B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2737676Y (en) * | 2004-10-26 | 2005-11-02 | 元贝实业股份有限公司 | Strap pressing device for bundling machine |
| CN202373315U (en) * | 2011-10-13 | 2012-08-08 | 秦山核电有限公司 | Underwater operating device for gripping end fittings of nuclear fuel assembly |
Non-Patent Citations (2)
| Title |
|---|
| JP昭54-19087A 1979.02.13 |
| 郭辉.压水堆AFA17×17燃料组件辐照变形及其堆芯装料.《中国优秀硕士学位论文全文数据库（电子期刊）工程科技Ⅱ辑》.2008,(第6期),C040-13. * |
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| Publication number | Publication date |
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| CN102376375A (en) | 2012-03-14 |
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