CN202307167U - Single rod checking device for irradiated nuclear fuel - Google Patents

Single rod checking device for irradiated nuclear fuel Download PDF

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Publication number
CN202307167U
CN202307167U CN2011203890473U CN201120389047U CN202307167U CN 202307167 U CN202307167 U CN 202307167U CN 2011203890473 U CN2011203890473 U CN 2011203890473U CN 201120389047 U CN201120389047 U CN 201120389047U CN 202307167 U CN202307167 U CN 202307167U
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CN
China
Prior art keywords
bearing
end cover
base plate
nuclear fuel
rotating mechanism
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2011203890473U
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Chinese (zh)
Inventor
陈梁
李涛
何少华
王聪
薛新才
李鹏
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Qinshan Nuclear Power Co Ltd
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Qinshan Nuclear Power Co Ltd
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Filing date
Publication date
Application filed by Qinshan Nuclear Power Co Ltd filed Critical Qinshan Nuclear Power Co Ltd
Priority to CN2011203890473U priority Critical patent/CN202307167U/en
Application granted granted Critical
Publication of CN202307167U publication Critical patent/CN202307167U/en
Anticipated expiration legal-status Critical
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/30Nuclear fission reactors

Abstract

The utility model relates to the technical field of irradiated damaged fuel component repair devices, and particularly discloses a single rod checking device for an irradiated nuclear fuel. The device comprises an eddy current coil, a rotary seat, a bottom plate and a bearing block, wherein the bearing block has a cylindrical structure, and is fixed on the bottom plate of which the center is provided with a through hole; a lower rotating mechanism is arranged in a cavity which is formed by the lower end of the bearing block and the bottom plate; an upper rotating mechanism is arranged in a cylinder wall at the upper end of the bearing block; and the rotary seat with the eddy current coil penetrates through the through hole in the center of the bottom plate from the lower end of the bottom plate, and is fixed on the lower rotating mechanism. The single rod checking device for the nuclear fuel has a simple structure, and fuel rods can be checked underwater; and in addition, springs are sleeved on threaded rods, so that the device can be conveniently and remotely assembled and disassembled underwater.

Description

A kind of device that is used for nuclear fuel list rod inspection behind the irradiation
Technical field
The utility model belongs to damaged fuel assembly prosthetic device technical field behind the irradiation, is specifically related to a kind of device that is used for nuclear fuel list rod inspection behind the irradiation.
Background technology
Pressurized-water reactor nuclear power plant reloads in the process, finds that damaged or its grid spacer coaming plate of the fuel rod of multiplexing fuel assembly has damage in various degree.The security generation significant impact of damaged meeting to the power station operation appears in fuel assembly behind the irradiation.The damaged leakage of fuel rod can cause radioactive fission product to leak in the circuit cools agent, causes system's radioactive level to increase.Damaged fuel assembly considers that the risk control of security of operation does not allow to return again stack operation in principle.The damage of spacer grid of fuel assembly coaming plate is meant the local slight damage of the peripheral coaming plate of screen work behind the irradiation, outer the sticking up of indivedual guide vane distortion.Because reactor core fuel assembly spacing distance is very little; 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 block, scrape, draw, thereby the safety of adjacent fuel assembly is produced threat with the generation of adjacent fuel assembly.If these assemblies are not handled,, safe consideration do not continue to use in view of will allowing back heap.
In addition, if the fuel assembly of and grid spacer coaming plate damage damaged to fuel rod behind the irradiation is not repaired and handled, also can cause enormous economic loss.According to desired 1/4, the 1/8 symmetrical requirement of refuelling scheme; Supposing that group fuel assembly damage is unavailable will cause other three groups of normal fuel assemblies on the reactor core symmetric position can't go into heap using; Will be with causing great waste; And interim calculating and checks that starts emergent refuelling scheme needs nearly one month, and this reloads prolongation time of overhaul, and the economic loss that causes will be will ten minutes huge.
Therefore, the fuel rod breakage of fuel assembly behind the irradiation or grid spacer damage are repaired be significant.
After to irradiation, need each the root charge bar withdrawing in the fuel assembly be come out to check in the repair process of fuel assembly; Whether damage or damaged has taken place with the inspection phase; If serious damage even breakage have taken place in fuel rod, the fuel rod that then need more renew.This can realize the device that fuel rod is checked under water with regard to needing a cover for this reason, and this device wants to realize the inspection circumferential to fuel rod, and can realize that long-range dismounting is convenient to the work such as maintenance maintenance of this complete equipment under water.
Summary of the invention
The purpose of the utility model is to provide a kind of irradiation after-burning material list rod testing fixture that is used for, and can realize under water the circumferential inspection of fuel list rod.
The technical scheme of the utility model is following: a kind ofly be used for nuclear fuel list rod testing fixture behind the irradiation; Comprise eddy current coil, rotary seat and base plate, also comprise bearing seat, wherein; Bearing seat is the cylindrical drum structure; And the center of being fixed on has on the base plate of through hole, in the cavity that bearing seat lower end and base plate form, is provided with the bottom rotating mechanism, in the barrel of the upper end of bearing seat, is provided with the top rotating mechanism; The rotary seat that eddy current coil is installed passes the through hole at base plate center from the base plate lower end, and is fixed on the rotating mechanism of bottom.
Described bottom rotating mechanism is made up of lower bearing upper end cover, lower bearing bottom end cover and lower bearing between the two; Wherein, The lower bearing upper end cover is the boss structure that the center has shoulder hole; Lower bearing is enclosed within on the boss of lower bearing upper end cover, and is fixedly clamped by the lower bearing bottom end cover.
Described bottom rotating mechanism is fixed on the barrel of bearing seat lower end through the lower bearing outer shroud, makes the axle rotation along bearing seat in the cavity of bearing seat lower end and base plate formation of lower bearing upper end cover and lower bearing bottom end cover.
Described top rotating mechanism is made up of upper bearing upper end cover, upper bearing bottom end cover and upper bearing between the two; Wherein, The upper bearing upper end cover is the boss structure that the center has shoulder hole; Upper bearing is enclosed within on the boss of upper bearing upper end cover, and is fixedly clamped by the upper bearing bottom end cover.
Described top rotating mechanism is fixed on the barrel of bearing seat upper end through the upper bearing outer shroud, and upper bearing upper end cover and upper bearing bottom end cover can be rotated along the axle of bearing seat.
Also be symmetrically installed with stationary installation on the described base plate.
Described stationary installation comprises screw rod, screw rod back-up ring and spring; Wherein, screw rod is that the bottom has screw thread, and the middle part has the club shaped structure of flange; Screw rod passes base plate; The spring of wedging ring between screw rod flange and base plate, and, also be provided with nut in the screw rod upper end by the upper end that the screw rod back-up ring that is fixed on the base plate blocks the screw rod flange.
Described bearing seat upper end is a cylindrical drum, and the lower end is the ladder cylindrical drum structure of " worker " font structure.
The remarkable result of the utility model is: the described a kind of nuclear fuel list rod testing fixture that is used for behind the irradiation of the utility model is simple in structure, can check fuel rod under water; Simultaneously, be with the screw rod of spring, can conveniently realize the long-range dismounting of this device under water.
Description of drawings
Fig. 1 is the described a kind of nuclear fuel list rod testing fixture structural representation behind the irradiation that is used for of the utility model;
Among the figure: 1, upper bearing upper end cover; 2, upper bearing; 3, upper bearing bottom end cover; 4, bearing seat; 5, lower bearing upper end cover; 6, lower bearing; 7, lower bearing bottom end cover; 8, rotary seat; 9, eddy current coil; 10, nut; 11, screw rod; 12, screw rod back-up ring; 13, spring; 14, base plate.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is done further explain.
As shown in Figure 1, a kind ofly be used for nuclear fuel list rod testing fixture behind the irradiation, comprise base plate 14, rotary seat 8, eddy current coil 9 and bearing seat 4; Wherein, bearing seat 4 upper ends are cylindrical drum, and the lower end is the ladder cylindrical drum structure of " worker " font structure; The flanged structure that stretch out bearing seat 4 lower surfaces has bearing seat 4 centers of being fixed on the base plate 14 of through hole through bolt, and the bottom rotating mechanism of being made up of lower bearing upper end cover 5, lower bearing bottom end cover 7 and lower bearing between the two 6 is installed in bearing seat 4 lower ends and the base plate 14 formed cavitys, wherein; Lower bearing upper end cover 5 has the boss structure of shoulder hole for the center, and lower bearing 6 is enclosed within on the boss of lower bearing upper end cover 5, and is fixedly clamped by lower bearing bottom end cover 7; And lower bearing 6 outer shrouds are fixed on the barrel of bearing seat 4 lower ends, make lower bearing upper end cover 5 and lower bearing bottom end cover 7 axle rotation along bearing seat 4 in the cavity of bearing seat 4 lower ends and base plate 14 formation, and the rotary seat 8 that eddy current coil 9 is installed passes the through hole at base plate 14 centers from base plate 14 lower ends; And be fixed on the lower bearing bottom end cover 7, the top rotating mechanism of being made up of upper bearing upper end cover 1, upper bearing bottom end cover 3 and upper bearing between the two 2 is installed on the ladder cylinder barrel of bearing seat 4 upper ends, wherein; Upper bearing upper end cover 1 has the boss structure of shoulder hole for the center; Upper bearing 2 is enclosed within on the boss of upper bearing upper end cover 1, and is fixedly clamped by upper bearing bottom end cover 3, and the outer shroud of upper bearing 2 is fixed on the bearing seat 4 upper end barrels; Upper bearing upper end cover 1 and upper bearing bottom end cover 3 can be rotated along the axle of bearing seat 4; On base plate 14, be symmetrically installed with stationary installation, can realize the installation and removal to the excellent testing fixture of this list, stationary installation comprises screw rod 11, screw rod back-up ring 12 and spring 13; Wherein, Screw rod 11 is for the bottom has screw thread, and the middle part has the club shaped structure of flange, and screw rod 11 passes base plate 14; The spring 13 of wedging ring between screw rod 11 flanges and base plate 14; And, nut 10 also is installed in screw rod 11 upper ends by the upper end that the screw rod back-up ring 12 that is fixed on the base plate 14 blocks screw rod 11 flanges, conveniently screw rod 11 is screwed operation.
The utility model is described a kind ofly to be used for that the concrete course of work of nuclear fuel list rod testing fixture is behind the irradiation: screw nut 10 through the stock tubular key; Whole device is fixed to the place of examine nuclear fuel list rod under water; At this moment; Screw rod 11 flanges move downward and leave screw rod back-up ring 12, and compression spring 13 storage elastic potential energys, and the fuel rod extractor inserts in the shoulder hole of upper bearing upper end cover 1; Through the rotation of upper bearing upper end cover 1, fuel rod is rotated in a circumferential direction with upper bearing bottom end cover 3; Eddy current coil 9 is installed on the rotary seat 8, can drives eddy current coil 9 through rotation lower bearing bottom end cover 7 and axially rotate around fuel rod; When nuclear fuel rod is checked out, screw nut 10 through the stock tubular key, spring 13 can be upspring screw rod 11, accomplishes the dismounting of this device.

Claims (8)

1. one kind is used for nuclear fuel list rod testing fixture behind the irradiation; Comprise eddy current coil (9), rotary seat (8) and base plate (14), it is characterized in that: also comprise bearing seat (4), wherein; Bearing seat (4) is the cylindrical drum structure; And the center of being fixed on has on the base plate (14) of through hole, in the cavity that bearing seat (4) lower end and base plate (14) form, is provided with the bottom rotating mechanism, in the barrel of the upper end of bearing seat (4), is provided with the top rotating mechanism; The rotary seat (8) that eddy current coil (9) are installed passes the through hole at base plate (14) center from base plate (14) lower end, and is fixed on the rotating mechanism of bottom.
2. a kind of nuclear fuel list rod testing fixture behind the irradiation that is used for according to claim 1; It is characterized in that: described bottom rotating mechanism is made up of lower bearing upper end cover (5), lower bearing bottom end cover (7) and lower bearing between the two (6); Wherein, Lower bearing upper end cover (5) has the boss structure of shoulder hole for the center, and lower bearing (6) is enclosed within on the boss of lower bearing upper end cover (5), and is fixedly clamped by lower bearing bottom end cover (7).
3. a kind of nuclear fuel list rod testing fixture behind the irradiation that is used for according to claim 2; It is characterized in that: described bottom rotating mechanism is fixed on the barrel of bearing seat (4) lower end through lower bearing (6) outer shroud, makes the axle rotation along bearing seat (4) in the cavity of bearing seat (4) lower end and base plate (14) formation of lower bearing upper end cover (5) and lower bearing bottom end cover (7).
4. a kind of nuclear fuel list rod testing fixture behind the irradiation that is used for according to claim 1; It is characterized in that: described top rotating mechanism is made up of upper bearing upper end cover (1), upper bearing bottom end cover (3) and upper bearing between the two (2); Wherein, Upper bearing upper end cover (1) has the boss structure of shoulder hole for the center, and upper bearing (2) is enclosed within on the boss of upper bearing upper end cover (1), and is fixedly clamped by upper bearing bottom end cover (3).
5. a kind of nuclear fuel list rod testing fixture behind the irradiation that is used for according to claim 4; It is characterized in that: described top rotating mechanism is fixed on the barrel of bearing seat (4) upper end through upper bearing (2) outer shroud, and upper bearing upper end cover (1) and upper bearing bottom end cover (3) can be rotated along the axle of bearing seat (4).
6. a kind of nuclear fuel list rod testing fixture behind the irradiation that is used for according to claim 1, it is characterized in that: described base plate also is symmetrically installed with stationary installation on (14).
7. a kind of nuclear fuel list rod testing fixture behind the irradiation that is used for according to claim 4; It is characterized in that: described stationary installation comprises screw rod (11), screw rod back-up ring (12) and spring (13); Wherein, screw rod (11) is for the bottom has screw thread, and the middle part has the club shaped structure of flange; Screw rod (11) passes base plate (14); The spring (13) of wedging ring between screw rod (11) flange and base plate (14), and, also be provided with nut (10) in screw rod (11) upper end by the upper end that the screw rod back-up ring (12) that is fixed on the base plate (14) blocks screw rod (11) flange.
8. be used for nuclear fuel list rod testing fixture behind the irradiation according to described any one of claim 1~7, it is characterized in that: described bearing seat (4) upper end is cylindrical drum, and the lower end is the ladder cylindrical drum structure of " worker " font structure.
CN2011203890473U 2011-10-13 2011-10-13 Single rod checking device for irradiated nuclear fuel Expired - Lifetime CN202307167U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011203890473U CN202307167U (en) 2011-10-13 2011-10-13 Single rod checking device for irradiated nuclear fuel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011203890473U CN202307167U (en) 2011-10-13 2011-10-13 Single rod checking device for irradiated nuclear fuel

Publications (1)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103559922A (en) * 2013-11-07 2014-02-05 国核电站运行服务技术有限公司 Eddy current detection device for fuel rod
CN104181227A (en) * 2013-05-21 2014-12-03 核动力运行研究所 Outside cross type elastic coil eddy current probe
CN105023623A (en) * 2015-06-24 2015-11-04 中广核核电运营有限公司 Nuclear fuel assembly repair device and method
CN106601315A (en) * 2016-11-02 2017-04-26 中国核电工程有限公司 Full-automatic helium leakage detection device for fuel rods

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104181227A (en) * 2013-05-21 2014-12-03 核动力运行研究所 Outside cross type elastic coil eddy current probe
CN104181227B (en) * 2013-05-21 2017-02-08 核动力运行研究所 Outside cross type elastic coil eddy current probe
CN103559922A (en) * 2013-11-07 2014-02-05 国核电站运行服务技术有限公司 Eddy current detection device for fuel rod
CN103559922B (en) * 2013-11-07 2016-02-17 国核电站运行服务技术有限公司 A kind of eddy current detection device for fuel rod
CN105023623A (en) * 2015-06-24 2015-11-04 中广核核电运营有限公司 Nuclear fuel assembly repair device and method
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
CN106601315A (en) * 2016-11-02 2017-04-26 中国核电工程有限公司 Full-automatic helium leakage detection device for fuel rods
CN106601315B (en) * 2016-11-02 2020-04-24 中国核电工程有限公司 Full-automatic helium leak detection device for fuel rod

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Granted publication date: 20120704