CN109036604B - Reactor core filtering device - Google Patents
Reactor core filtering device Download PDFInfo
- Publication number
- CN109036604B CN109036604B CN201810803897.XA CN201810803897A CN109036604B CN 109036604 B CN109036604 B CN 109036604B CN 201810803897 A CN201810803897 A CN 201810803897A CN 109036604 B CN109036604 B CN 109036604B
- Authority
- CN
- China
- Prior art keywords
- pipe body
- spring
- accommodating part
- compression bar
- piece
- 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.)
- Active
Links
- 238000001914 filtration Methods 0.000 title claims abstract description 18
- 230000006835 compression Effects 0.000 claims abstract description 25
- 238000007906 compression Methods 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
-
- 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
- G21C19/28—Arrangements for introducing fluent material into the reactor core; Arrangements for removing fluent material from the reactor core
- G21C19/30—Arrangements for introducing fluent material into the reactor core; Arrangements for removing fluent material from the reactor core with continuous purification of circulating fluent material, e.g. by extraction of fission products deterioration or corrosion products, impurities, e.g. by cold traps
- G21C19/307—Arrangements for introducing fluent material into the reactor core; Arrangements for removing fluent material from the reactor core with continuous purification of circulating fluent material, e.g. by extraction of fission products deterioration or corrosion products, impurities, e.g. by cold traps specially adapted for liquids
-
- 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 discloses a reactor core filtering device, which is used in a reactor core of a pressurized water reactor and comprises: the device comprises a device body (1) which comprises a spring accommodating part (10), a first pipe body (11) and a second pipe body (12) which are sequentially arranged and communicated; the compression bar (2), the compression bar (2) is worn in the spring accommodating part (10) and the first tube body (11), the first end extends into the second tube body (12), the first end is fixedly provided with two clamping spring pieces (21), the second end is provided with an operating handle (20), and an abutting piece (22) is fixedly arranged at the position accommodated in the spring accommodating part (10); the lower part of the second pipe body (12) is provided with a release hole (120) for the end part of the clamping spring piece (21) to penetrate through and expose out of the second pipe body (12). The invention has the advantages of convenient installation and maintenance, good filtering effect, good safety and the like.
Description
Technical Field
The invention relates to the technical field of nuclear power, in particular to a reactor core filtering device.
Background
The internals filter assembly is mounted on the internals core lower plate for trapping foreign matter in the main circuit.
Some existing internals filter assemblies are typically of unitary construction and require fastening to the lower core plate by means of screw compression. However, the existing structure has some defects, firstly, the installation is complex, and the maintenance and the update are troublesome; in addition, if a large foreign matter exists in the main circuit, the filter screen may be blocked or damaged, so that the foreign matter enters the steam generator, and a large potential safety hazard exists.
Disclosure of Invention
The invention aims to solve the technical problem of providing a reactor core filtering device which has the advantages of convenience in installation and maintenance, good filtering effect, good safety and the like.
In order to solve the above technical problems, an embodiment of the present invention provides a core filter device for a core of a pressurized water reactor, which at least includes:
the device comprises a device body, a first pipe body and a second pipe body, wherein the device body comprises a spring accommodating part, a first pipe body and a second pipe body which are sequentially arranged and communicated, a spring is arranged in the spring accommodating part, a filter screen is arranged in the first pipe body, a filter plate is arranged in the second pipe body, and a plurality of filter holes are formed in the filter plate;
the compression bar penetrates through the spring accommodating part and the first tube body, the first end of the compression bar extends into the second tube body, and two clamping spring pieces are fixedly arranged at the first end; the second end of the device is provided with an operating handle; an abutting piece is fixed on the part of the spring accommodating part;
the spring is sleeved on the compression bar, and one end of the spring, which is far away from the first pipe body, is abutted against the abutting piece; the pipe diameter of the first pipe body is larger than that of the second pipe body, and an abutting surface is formed at the joint of the first pipe body and the second pipe body; the lower part of the second pipe body is provided with a release hole for the end part of the clamping spring to penetrate through and expose out of the second pipe body.
The two clamping spring pieces form an acute angle, and each clamping spring piece faces upwards towards the end part of the release hole.
And the inner wall of the second pipe body and the same plane of the release hole are provided with tightening grooves for abutting against the end parts of the clamping springs.
Wherein, the interval is provided with the flow hole on the outer wall of first body.
Wherein, the filter screen in the first pipe body covers the water flowing hole.
Wherein, the external diameter of the second pipe body is adapted to the internal diameter of the through hole of the reactor core lower plate.
Wherein, be provided with the water inlet on the position that is located on the second body the filter below.
The implementation of the invention has the following beneficial effects:
by implementing the device provided by the invention, the filter plate is arranged at the water inlet end, so that the foreign matters can be filtered in the first step and then further filtered through the filter screen; therefore, soft and hard foreign matters in the nuclear steam supply system during tandem washing and cold and hot test run can be trapped in the bottom head cavity (the second pipe body), hardware is prevented from damaging the nuclear steam supply system component equipment, and the filtering effect is good and is safe enough;
meanwhile, the filter device can be changed according to the aperture of the lower plate of the reactor core so as to adapt to pressurized water reactor units of different types;
in addition, the installation and maintenance processes of the device and the reactor core bottom plate are very simple and convenient, and in the practical application process, the device can be rapidly installed in a single hole or can be integrally installed after a plurality of devices are combined; meanwhile, the long rod tool can be installed at a certain distance.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a longitudinal cross-sectional view of one embodiment of a core filtration device provided by the present invention;
fig. 2 is a cross-sectional view taken along A-A of fig. 1.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
FIG. 1 is a longitudinal cross-sectional view of one embodiment of a core filtration device provided by the present invention; as shown in fig. 2. In this embodiment, the core filter device is used in the core of a pressurized water reactor, and is characterized in that it includes at least:
the device body 1 comprises a spring accommodating part 10, a first pipe body 11 and a second pipe body 12 which are sequentially arranged and communicated; the spring accommodating part 10 is provided with a spring 4; a plurality of water flow holes 110 are formed in the outer wall of the first pipe body 11 at intervals, and a filter screen 3 is arranged in the first pipe body 11; a filter plate 5 is arranged in the second pipe body 12, and a plurality of filter holes 50 are formed in the filter plate 5;
the compression bar 2 is arranged in the spring accommodating part 10 and the first pipe body 11 in a penetrating way, a first end of the compression bar 2 extends into the second pipe body 12, two clamping spring pieces 21 are fixedly arranged at the first end, an operating handle 20 is arranged at the second end of the compression bar, and an abutting piece 22 is fixedly arranged at the position accommodated in the spring accommodating part 10;
wherein, the spring 4 is sleeved on the compression bar 2, and one end of the spring 4 away from the first pipe body 11 is propped against the propping piece 22; the pipe diameter of the first pipe body 11 is larger than that of the second pipe body 12, and an abutting surface 112 is formed at the joint of the first pipe body 11 and the second pipe body 12; the lower portion of the second tube body 12 is provided with a release hole 120 through which the end portion of the clamping spring piece 21 passes and is exposed outside the second tube body 12.
Wherein the two clamping spring pieces 21 form an acute angle, and each clamping spring piece 21 faces upwards towards the end of the release hole 120.
Wherein, a tightening groove 121 is provided on the same plane as the release hole 120 on the inner wall of the second tube body 12, so that the end of the clamping spring piece 21 abuts against the tightening groove.
Wherein the filter plate 5 is located at the lower side of the first end of the compression bar 2.
Wherein, the filter 3 in the first pipe 11 covers the water flowing hole 110.
Wherein, the outer diameter of the second pipe body 12 is matched with the inner diameter of the through hole of the reactor core lower plate 6.
Wherein a water inlet (not shown) is provided in a portion of the second tube body 12 below the filter plate 5.
It will be appreciated that the following briefly describes the installation and use of the device provided by the present invention.
The core filtration device is installed in 4 holes on the lower core plate corresponding to each group of fuel assemblies in the reactor. Before being inserted into the hole of the lower core plate, the two compression spring pieces 21 at the end of the compression rod 2 are received in the tightening slots 121, and the torsion springs of the two compression spring pieces 21 are in a contracted state. When the operation handle 20 is inserted into the hole, the abutting surface 112 formed at the joint of the first pipe body 11 and the second pipe body 12 is attached to the upper surface of the lower core plate 6, and then the operation handle 20 is pressed down, so that the compression spring piece 21 is contracted to a certain extent, and the compression spring piece 21 slides out of the tightening groove 121. Then the operating handle 20 is rotated by 90 degrees, and the pressing lever 2 drives the pressing spring piece 21 to be rotated by 90 degrees, so that the pressing spring piece 21 is aligned with the release hole 120. When the operating handle 20 is released, the spring 4 drives the compression rod 2 to ascend, and the torsion spring of the compression spring piece 21 starts to release pressure, so that the compression spring piece 21 extends out of the release hole 120, and the end of the compression spring piece is attached to the lower surface of the reactor core lower plate 6, so that compression of the filter device is realized.
When water flow (such as coolant) enters the reactor core filtering device during operation, when foreign matters exist in the water flow, the filtering holes 50 of the filtering plate 5 at the lower part of the device are used for filtering once, larger foreign matters are filtered, and smaller foreign matters enter the filtering device and are filtered by the denser filter screen 3, so that the purpose of preventing the foreign matters from entering the steam generator is achieved. Therefore, the filter screen can be prevented from being damaged due to the blockage of the filter screen by larger foreign matters in the prior art, and the foreign matters enter the steam generator.
It will be appreciated that in other embodiments, 4 core filters may be combined into a single new filter, thereby increasing the safety of the filter.
The implementation of the invention has the following beneficial effects:
by implementing the device provided by the invention, the filter plate is arranged at the water inlet end, so that the foreign matters can be filtered in the first step and then further filtered through the filter screen; therefore, soft and hard foreign matters in the nuclear steam supply system during tandem washing and cold and hot test run can be trapped in the bottom head cavity (the second pipe body), hardware is prevented from damaging the nuclear steam supply system component equipment, and the filtering effect is good and is safe enough;
meanwhile, the filter device can be changed according to the aperture of the lower plate of the reactor core so as to adapt to pressurized water reactor units of different types;
in addition, the installation and maintenance processes of the device and the reactor core bottom plate are very simple and convenient, and in the practical application process, the device can be rapidly installed in a single hole, and a plurality of devices can be integrally installed after being combined; meanwhile, the long rod tool can be installed at a certain distance.
The above disclosure is only a preferred embodiment of the present invention, and it is needless to say that the scope of the invention is not limited thereto, and therefore, the equivalent changes according to the claims of the present invention still fall within the scope of the present invention.
Claims (5)
1. A core filtration device for use in the core of a pressurized water reactor, comprising at least:
the device comprises a device body (1) which comprises a spring accommodating part (10), a first pipe body (11) and a second pipe body (12) which are sequentially arranged and communicated; a spring (4) is arranged in the spring accommodating part (10); a plurality of water flowing holes (110) are formed in the outer wall of the first pipe body (11) at intervals, and a filter screen (3) is arranged in the first pipe body (11); a filter plate (5) is arranged in the second pipe body (12), and a plurality of filter holes (50) are formed in the filter plate (5);
the compression bar (2), the compression bar (2) is worn in the spring accommodating part (10) and the first tube body (11), the first end extends into the second tube body (12), the first end is fixedly provided with two clamping spring pieces (21), the second end is provided with an operating handle (20), and an abutting piece (22) is fixedly arranged at the position accommodated in the spring accommodating part (10);
the spring 4 is sleeved on the compression bar (2), and one end of the spring (4) far away from the first pipe body (11) is abutted against the abutting piece (22); the pipe diameter of the first pipe body (11) is larger than that of the second pipe body (12), and an abutting surface (112) is formed at the joint of the first pipe body (11) and the second pipe body (12); the lower part of the second pipe body (12) is provided with a release hole (120) for the end part of the clamping spring piece (21) to penetrate through and expose out of the second pipe body (12);
wherein the two clamping spring pieces (21) form an acute angle, and the end part of each clamping spring piece (21) facing the release hole (120) faces upwards;
and a tightening groove (121) is formed on the same plane of the inner wall of the second pipe body (12) and the release hole (120) for abutting against the end part of the clamping spring piece (21).
2. A device according to claim 1, characterized in that the filter plate (5) is located at the underside of the first end of the compression bar (2).
3. A device according to claim 2, wherein the filter screen (3) in the first pipe body (11) covers the water flow hole (110).
4. A device according to claim 3, characterized in that the outer diameter of the second tubular body (12) is adapted to the inner diameter of the through hole of the lower core plate (6).
5. A device according to claim 4, characterized in that a water inlet is provided in the second pipe body (12) at a location below the filter plate (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810803897.XA CN109036604B (en) | 2018-07-20 | 2018-07-20 | Reactor core filtering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810803897.XA CN109036604B (en) | 2018-07-20 | 2018-07-20 | Reactor core filtering device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109036604A CN109036604A (en) | 2018-12-18 |
| CN109036604B true CN109036604B (en) | 2024-01-16 |
Family
ID=64644692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810803897.XA Active CN109036604B (en) | 2018-07-20 | 2018-07-20 | Reactor core filtering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109036604B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8624023D0 (en) * | 1985-10-07 | 1986-11-12 | Westinghouse Electric Corp | Reactor internals loose parts strainer |
| CN1637956A (en) * | 2004-01-05 | 2005-07-13 | 西屋电气有限责任公司 | Nuclear fuel assembly debris filter bottom nozzle |
| CN1771567A (en) * | 2004-02-10 | 2006-05-10 | 韩国原子力研究所 | Device and process for cooling molten core material released from a reactor vessel |
| JP2006201107A (en) * | 2005-01-24 | 2006-08-03 | Global Nuclear Fuel-Japan Co Ltd | Foreign matter capturing apparatus, boiling water reactor and its operation method |
| CN101587755A (en) * | 2008-05-21 | 2009-11-25 | 西屋电气有限责任公司 | Nuclear core component hold-down assembly |
| CN201930616U (en) * | 2011-01-13 | 2011-08-17 | 中广核工程有限公司 | Nuclear reactor internal filter device |
| CN102371088A (en) * | 2010-08-12 | 2012-03-14 | 韩国水力原子力株式会社 | Strainer filtering apparatus including filtering tube |
| CN102576571A (en) * | 2009-10-16 | 2012-07-11 | 法国原子能及替代能源委员会 | Nuclear fuel assembly and nuclear reactor comprising such assemblies |
| CN103106931A (en) * | 2013-02-04 | 2013-05-15 | 中国核动力研究设计院 | Reactor internal suitable for supercritical water-cooled reactor two-flow core |
| CN203026145U (en) * | 2012-12-10 | 2013-06-26 | 中国核动力研究设计院 | Pressing member adaptive to inserting measuring instrument into fuel assembly from upper part of reactor core |
| CN103177782A (en) * | 2013-01-08 | 2013-06-26 | 上海核工程研究设计院 | Lower reactor internals for reactor |
| CN203055477U (en) * | 2013-02-04 | 2013-07-10 | 中国核动力研究设计院 | Flow-concentrating double flow path supercritical water cooled reactor |
| CN103377735A (en) * | 2012-04-27 | 2013-10-30 | 上海核工程研究设计院 | Reactor internal on lower part of reactor |
| CN208570130U (en) * | 2018-07-20 | 2019-03-01 | 中广核研究院有限公司 | A kind of novel reactor core filter device |
-
2018
- 2018-07-20 CN CN201810803897.XA patent/CN109036604B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8624023D0 (en) * | 1985-10-07 | 1986-11-12 | Westinghouse Electric Corp | Reactor internals loose parts strainer |
| CN1637956A (en) * | 2004-01-05 | 2005-07-13 | 西屋电气有限责任公司 | Nuclear fuel assembly debris filter bottom nozzle |
| CN1771567A (en) * | 2004-02-10 | 2006-05-10 | 韩国原子力研究所 | Device and process for cooling molten core material released from a reactor vessel |
| JP2006201107A (en) * | 2005-01-24 | 2006-08-03 | Global Nuclear Fuel-Japan Co Ltd | Foreign matter capturing apparatus, boiling water reactor and its operation method |
| CN101587755A (en) * | 2008-05-21 | 2009-11-25 | 西屋电气有限责任公司 | Nuclear core component hold-down assembly |
| CN102576571A (en) * | 2009-10-16 | 2012-07-11 | 法国原子能及替代能源委员会 | Nuclear fuel assembly and nuclear reactor comprising such assemblies |
| CN102371088A (en) * | 2010-08-12 | 2012-03-14 | 韩国水力原子力株式会社 | Strainer filtering apparatus including filtering tube |
| CN201930616U (en) * | 2011-01-13 | 2011-08-17 | 中广核工程有限公司 | Nuclear reactor internal filter device |
| CN103377735A (en) * | 2012-04-27 | 2013-10-30 | 上海核工程研究设计院 | Reactor internal on lower part of reactor |
| CN203026145U (en) * | 2012-12-10 | 2013-06-26 | 中国核动力研究设计院 | Pressing member adaptive to inserting measuring instrument into fuel assembly from upper part of reactor core |
| CN103177782A (en) * | 2013-01-08 | 2013-06-26 | 上海核工程研究设计院 | Lower reactor internals for reactor |
| CN103106931A (en) * | 2013-02-04 | 2013-05-15 | 中国核动力研究设计院 | Reactor internal suitable for supercritical water-cooled reactor two-flow core |
| CN203055477U (en) * | 2013-02-04 | 2013-07-10 | 中国核动力研究设计院 | Flow-concentrating double flow path supercritical water cooled reactor |
| CN208570130U (en) * | 2018-07-20 | 2019-03-01 | 中广核研究院有限公司 | A kind of novel reactor core filter device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109036604A (en) | 2018-12-18 |
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