CN202711724U - Gas-pressure leakage detection and test device for fuel rod after irradiation in hot chamber - Google Patents
Gas-pressure leakage detection and test device for fuel rod after irradiation in hot chamber Download PDFInfo
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- CN202711724U CN202711724U CN2012204403277U CN201220440327U CN202711724U CN 202711724 U CN202711724 U CN 202711724U CN 2012204403277 U CN2012204403277 U CN 2012204403277U CN 201220440327 U CN201220440327 U CN 201220440327U CN 202711724 U CN202711724 U CN 202711724U
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- fuel rod
- hot cell
- seal
- test device
- sealing
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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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Abstract
The utility model provides a gas-pressure leakage detection and test device for a fuel rod after irradiation in a hot chamber. The gas-pressure leakage detection and test device comprises a stamping device, wherein the stamping device comprises fuel rod elastic fixing brackets and a sealing head which are connected with the fuel rod, and the sealing head comprises a sealing body, a backing ring, a sealing handle and a base; a side surface opening is formed on the side surface of the sealing body, and the sealing ring, the backing ring and the sealing handle are installed in the side surface opening; a top opening is formed at the top of the sealing body and is connected with a helium gas bottle; and the sealing body is connected with the fuel rod through the sealing handle. The gas-pressure leakage detection and test device has the advantages that sealing members of the sealing head adopt radiation-resistant silicone rubber and are used in a multilayered and matched manner; and the size, the operating method and the rotating force of a rotating handle can be adjusted according to the actual operation requirements of a mechanical hand, so as to realize gas seal under 4MPa.
Description
Technical field
The utility model relates to air pressure leak test device, particularly relates to a kind of device that fuel rod behind the irradiation is carried out the air pressure leak detection, is installed in the hot environment hot cell and uses, and all operations all adopts mechanical arm to finish in the hot cell.
Background technology
Fuel rod is the core component of nuclear reactor, and the impermeability of fuel rod is directly connected to the safe operation of reactor, is the first safety curtain that prevents that fission product from leaking.When although fuel rod dispatches from the factory, carried out air pressure leak detection and the helium mass spectrum leak detection under the low pressure, but because fuel rod moves under very harsh operating mode, must stand cooling medium impact, high temperature, high pressure, neutron irradiation, corrosion and the PCI effect of starting and stopping heap, some tiny flaws that are present in starting material and the weld seam might be expanded, when serious even run through involucrum or weld seam, cooling medium infiltrates and fuel core body generation uranium-water reaction, causes the generation of anomalous event or accident.Therefore, carry out fuel rod clad behind the irradiation, the air-tight test of end plug, plug-hole weldering and girth joint up and down, particularly bubble-tight inspection has very important significance to the fuel rod that has an accident.
Mainly quality awareness control and check in the fuel rod manufacture process both at home and abroad, used air pressure leakage detecting device pressure is lower.Fuel rod has hot behind the irradiation, implements leakage detection by bubble emission method and mainly utilizes seal case, and fuel rod is placed liquid in the casing, adopts the mode that heats or vacuumize to change the fuel rod inside and outside differential pressure to reach the leak detection purpose.Be subjected to the restriction of evaporation point and bubble and vapour pressure, the maximum differential pressure that this dual mode produces all is lower than 0.2MPa.Therefore, need the air pressure leak test device of a kind of novel produced higher differential pressure of development.。
The utility model content
The technical problems to be solved in the utility model provide a kind of can under the hot environment to irradiation after fuel rod carry out the air pressure leak test device of elevated pressures, this device all operations were adopts mechanical arm to finish.
Implementation of the present utility model is as follows: fuel rod air pressure leak test device behind the irradiation of hot cell, comprise decompressor, its decompressor comprises fuel rod flexible fastening support and the seal head that is connected with fuel rod, described seal head comprises seal and O-ring seal, gasket ring, sealing handle, base, the side of seal has a lateral opening, its O-ring seal, gasket ring, sealing handle are installed in this lateral opening, the top of seal has an open top, this open top is connected with helium tank, and described seal is connected with fuel rod by the sealing handle.
Also comprise the leak detection groove, described fuel rod flexible fastening support is fixedly mounted on the inner groovy of leak detection groove, and the medial surface of described leak detection groove is pasted with protective pad.
Also comprise the casing shielding wall, the casing shielding wall outside is the proparea, hot cell, and casing shielding within the walls side is the hot cell, and the leak detection groove is placed on the hot cell, and seal head is placed on the proparea, hot cell.
Also comprise the helium mass spectrometer leak detector that is placed on the proparea, hot cell, described helium mass spectrometer leak detector is connected with suction gun by detecting after pipeline runs through the casing shielding wall, and described suction gun is placed on the hot cell.
Also comprise the video monitor camera that is placed on the hot cell.
The opening part of described helium tank is provided with reduction valve, and reduction valve is connected with rain glass, and described reduction valve is by pipeline and seal head conducting.
Based on foregoing description, can find out that a kind of test unit for fuel rod behind the irradiation being carried out the air pressure leak detection of the utility model mainly is comprised of parts such as leak detection groove, seal head, video camera, helium mass spectrometer leak detector, helium tanks.Described leak detection groove comprises the casing that is connected with fuel rod flexible fastening support.Described casing is the support platform of seal head, fuel rod flexible fastening support and fuel rod, and described flexible fastening support is for the protection of property fixed fuel rod; Described seal head is comprised of seal, O-ring seal, gasket ring, sealing handle and base, and described seal has two openings, and an opening is used for installing O-ring seal, gasket ring and sealing handle, is used for the sealing to fuel rod, and another opening is used for connecting helium tank; Described base is the support component of whole seal head; Described video camera is the checkout equipment of gas pressure test, and the length of quantity based on fuel rod is determined; Described helium mass spectrometer leak detector is the checkout equipment of gas pressure test, is comprised of main frame and suction gun.Described main frame places the proparea, hot cell, and described suction gun places in the housing of hot cell, operates with mechanical arm; Described helium tank is comprised of gas cylinder, reduction valve and tensimeter.Described device is installed on the hot environment, in the housing of hot cell.The operation of described device all adopts mechanical arm to finish.It is inert gas helium that described device carries out the used spike medium of air pressure leak test, and chemical molecular formula is He.The mode that described device air pressure leak test view mode adopts video monitor method and helium monitoring method to combine is carried out.Described video monitor camera is positioned in the housing of hot cell, and monitor places the proparea, hot cell, and both connect by data line.The suction gun of described helium monitoring method is positioned in the housing of hot cell, operates by mechanical arm in the hot cell, and the leak locator of described helium monitoring method places the proparea, hot cell, and both connect by tracheae.The fuel rod fixed form of described device is finished by elastic support, and described elastic support is comprised of two parts up and down, and there is rubber tube protection the fuel rod contact site.Described device adopts the foam-rubber cushion sealing means, prevents that fuel rod from coming off.
The utility model has the advantage of: the seal of seal head adopts radiation-resistant silicon rubber, and multilayer is used; Rotary handle size, mode of operation and power can be adjusted according to mechanical arm practical operation needs, can realize the air seal of 4MPa.
Description of drawings
Fig. 1 is fuel rod air pressure leak test apparatus structure and schematic diagram behind a kind of irradiation provided by the utility model.
Fig. 2 is hot cell partial structure figure.
Fig. 3 is the seal head structural drawing.
Label among the figure is expressed as respectively: 1 is protective pad, and 2 are the leak detection groove, and 3 is fuel rod flexible fastening support, 4 is fuel rod, and 5 is the video monitor camera, and 6 is suction gun, 7 is seal head, and 8 is rain glass, and 9 is reduction valve, 10 is helium tank, 11 is helium mass spectrometer leak detector, and 12 is the casing shielding wall, and 13 is rotary handle, 14 is gasket ring, and 15 is O-ring seal.
Embodiment
Embodiment one
As shown in Figure 1, 2, 3.
The utility model air pressure leak test device mainly is comprised of leak detection groove, seal head, video camera, helium mass spectrometer leak detector and several parts of helium tank.The leak detection groove is comprised of casing and fuel rod flexible fastening support, and casing is the support platform of seal head, fuel rod flexible fastening support and fuel rod, and the flexible fastening support is used for fixing and the protection fuel rod; Seal head is comprised of seal, O-ring seal, gasket ring, sealing handle and base; Seal has two openings, and an opening is used for installing O-ring seal, gasket ring and sealing handle, realizes the sealing to fuel rod, and another opening is used for connecting helium tank; Base is the support component of whole seal head; Video camera is the checkout equipment of gas pressure test, and the length of based on fuel rod is determined its quantity; Helium mass spectrometer leak detector is the checkout equipment of gas pressure test, is comprised of main frame and suction gun, and main frame places the proparea, hot cell, and suction gun places in the housing of hot cell, operates with mechanical arm; Helium tank is comprised of gas cylinder, reduction valve and tensimeter.
The seal of seal head adopts radiation-resistant silicon rubber, and multilayer is used; Rotary handle size, mode of operation and power can be adjusted according to mechanical arm practical operation needs, can realize the air seal of 4MPa.
The spike medium adopts at present available inert gas helium.
Leakage monitoring adopts video monitor and Helium leak detector to detect two kinds of modes that combine.Wherein the quantity of the used camera of video monitor is configured according to its enlargement factor and effective range of observation, in the general 400mm length range camera is installed; The helium Mass Spectrometer Method is highly sensitive in 2 * 10
-7Pam
3/ s.
Figure below is described in further detail the utility model in conjunction with above-mentioned accompanying drawing and example.
The utility model device comprises: leak detection groove, seal head, video camera, helium mass spectrometer leak detector and helium tank.
Leak detection groove 2 comprises casing and fuel rod flexible fastening support 3, is the support platform of cushion pad 1, seal head 7, fuel rod flexible fastening support 3 and fuel rod 4.Fuel rod flexible fastening support 3 is placed on the box bottom after seal head 7 has assembled by certain altitude and being distributed on the casing, is processed with installation screw on the base plate.Cushion pad 1 is fixed on a side relative with seal head 7.
Flexible fastening support 3 is used for fixing and the protection fuel rod, is comprised of two parts up and down.Lower part is used for supporting fuel rod 4, and upper part is used for compressing fuel rod 4, and two parts and fuel rod 4 touching positions all overlap the flexible rubber pipe is arranged up and down.
Seal head 7 is comprised of seal, O-ring seal 15, gasket ring 14, sealing handle 13 and base.Seal has two openings, and an opening is positioned at the side and is used for installing O-ring seal 15, gasket ring 14 and sealing handle 13, is used for the sealing to fuel rod; Another opening is positioned at the top, is used for connecting helium tank 10.
Helium mass spectrometer leak detector 11 is checkout equipments of gas pressure test, is comprised of main frame and suction gun 6, and main frame places the proparea, hot cell, and suction gun 6 places in the housing of hot cell, and suction gun 6 is connected with helium mass spectrometer leak detector and is connected by tracheae.
The air pressure leak test is divided into two kinds according to the surveillance style difference, and a kind of is to adopt video camera 5 to monitor, a kind of employing helium mass spectrometer leak detector 11 carries out the helium monitoring.First kind of way after fuel rod 4 sealing, is put into deionized water and is flooded fuel rod in the leak detection groove, by variable valve 9 pressurizations, by fuel rod 4 bubbling phenomenons in the video monitor leak detection groove 2, is transferred on the display of proparea by video line and gathers.The second way after fuel rod 4 sealings, by variable valve 9 pressurizations, moves along fuel rod 4 with manipulator clamping suction gun 6, and helium mass spectrometer leak detector is by carrying out the leakage situation that mass spectrophotometry can be obtained fuel rod to endotracheal gas.
As mentioned above, then can well realize the utility model.
Claims (6)
1. fuel rod air pressure leak test device behind the irradiation of hot cell, it is characterized in that: comprise decompressor, its decompressor comprises fuel rod flexible fastening support (3) and the seal head (7) that is connected with fuel rod (4), described seal head comprises seal, and O-ring seal (15), gasket ring (14), sealing handle (13), base, the side of seal has a lateral opening, its O-ring seal (15), gasket ring (14), the sealing handle is installed in this lateral opening, the top of seal has an open top, this open top is connected with helium tank (10), and described seal is connected with fuel rod (4) by sealing handle (13).
2. fuel rod air pressure leak test device behind the irradiation of hot cell according to claim 1, it is characterized in that: also comprise leak detection groove (2), described fuel rod flexible fastening support is fixedly mounted on the inner groovy of leak detection groove, and the medial surface of described leak detection groove (2) is pasted with protective pad (1).
3. fuel rod air pressure leak test device behind the irradiation of hot cell according to claim 2, it is characterized in that: also comprise casing shielding wall (12), the casing shielding wall outside is the proparea, hot cell, casing shielding within the walls side is the hot cell, leak detection groove (2) is placed on the hot cell, and seal head (7) is placed on the proparea, hot cell.
4. fuel rod air pressure leak test device behind the irradiation of hot cell according to claim 3, it is characterized in that: also comprise the helium mass spectrometer leak detector (11) that is placed on the proparea, hot cell, described helium mass spectrometer leak detector is connected with suction gun (6) by detecting after pipeline runs through the casing shielding wall, and described suction gun is placed on the hot cell.
5. fuel rod air pressure leak test device behind the irradiation of hot cell according to claim 3 is characterized in that: also comprise the video monitor camera (5) that is placed on the hot cell.
6. fuel rod air pressure leak test device behind the irradiation of the described hot cell of any one according to claim 1-5, it is characterized in that: the opening part of described helium tank is provided with reduction valve (9), reduction valve is connected with rain glass (8), and described reduction valve is by pipeline and seal head conducting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204403277U CN202711724U (en) | 2012-08-31 | 2012-08-31 | Gas-pressure leakage detection and test device for fuel rod after irradiation in hot chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204403277U CN202711724U (en) | 2012-08-31 | 2012-08-31 | Gas-pressure leakage detection and test device for fuel rod after irradiation in hot chamber |
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| CN202711724U true CN202711724U (en) | 2013-01-30 |
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| CN2012204403277U Expired - Lifetime CN202711724U (en) | 2012-08-31 | 2012-08-31 | Gas-pressure leakage detection and test device for fuel rod after irradiation in hot chamber |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103247359A (en) * | 2013-04-23 | 2013-08-14 | 中国核动力研究设计院 | Online sipping detection system for integrity detection for fuel element cladding in nuclear power plant |
| CN105006261A (en) * | 2015-07-03 | 2015-10-28 | 中科华核电技术研究院有限公司 | Nuclear fuel subassembly video detection method and detection device |
| CN108518585A (en) * | 2018-04-02 | 2018-09-11 | 陕西建工安装集团有限公司 | A kind of chemical pipeline leaks detection method |
| CN108766603A (en) * | 2018-06-20 | 2018-11-06 | 成都东方仪器有限公司 | A kind of superhigh temperature helium-leakage detecting apparatus |
| CN110307945A (en) * | 2019-04-26 | 2019-10-08 | 重庆天辉能源科技有限公司 | A kind of detection device of cylindrical lithium ion battery leakproofness |
| CN112605068A (en) * | 2020-12-15 | 2021-04-06 | 湖南大学 | Irradiation-resistant variable-focus laser cleaning device and using method |
-
2012
- 2012-08-31 CN CN2012204403277U patent/CN202711724U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103247359A (en) * | 2013-04-23 | 2013-08-14 | 中国核动力研究设计院 | Online sipping detection system for integrity detection for fuel element cladding in nuclear power plant |
| CN105006261A (en) * | 2015-07-03 | 2015-10-28 | 中科华核电技术研究院有限公司 | Nuclear fuel subassembly video detection method and detection device |
| CN105006261B (en) * | 2015-07-03 | 2017-12-26 | 中广核研究院有限公司 | Nuclear fuel assembly video detecting method and detection means |
| CN108518585A (en) * | 2018-04-02 | 2018-09-11 | 陕西建工安装集团有限公司 | A kind of chemical pipeline leaks detection method |
| CN108518585B (en) * | 2018-04-02 | 2020-02-21 | 陕西建工安装集团有限公司 | Chemical pipeline leakage detection method |
| CN108766603A (en) * | 2018-06-20 | 2018-11-06 | 成都东方仪器有限公司 | A kind of superhigh temperature helium-leakage detecting apparatus |
| CN110307945A (en) * | 2019-04-26 | 2019-10-08 | 重庆天辉能源科技有限公司 | A kind of detection device of cylindrical lithium ion battery leakproofness |
| CN110307945B (en) * | 2019-04-26 | 2021-05-25 | 重庆天辉能源科技有限公司 | Detection apparatus for cylindrical lithium ion battery leakproofness |
| CN112605068A (en) * | 2020-12-15 | 2021-04-06 | 湖南大学 | Irradiation-resistant variable-focus laser cleaning device and using method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130130 |