CN113113160A - Containment top gate leakage filtering system - Google Patents
Containment top gate leakage filtering system Download PDFInfo
- Publication number
- CN113113160A CN113113160A CN202110360733.6A CN202110360733A CN113113160A CN 113113160 A CN113113160 A CN 113113160A CN 202110360733 A CN202110360733 A CN 202110360733A CN 113113160 A CN113113160 A CN 113113160A
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- Prior art keywords
- leakage
- pipeline
- containment
- air extraction
- cavity
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- 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.)
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- 238000001914 filtration Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000000605 extraction Methods 0.000 claims abstract description 23
- 238000002347 injection Methods 0.000 claims abstract description 18
- 239000007924 injection Substances 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000002955 isolation Methods 0.000 claims description 14
- 230000032683 aging Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 7
- 239000000941 radioactive substance Substances 0.000 description 7
- 230000002285 radioactive effect Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 239000000443 aerosol Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/10—Means for preventing contamination in the event of leakage, e.g. double wall
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C9/00—Emergency protection arrangements structurally associated with the reactor, e.g. safety valves provided with pressure equalisation devices
- G21C9/02—Means for effecting very rapid reduction of the reactivity factor under fault conditions, e.g. reactor fuse; Control elements having arrangements activated in an emergency
-
- 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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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention relates to the field of nuclear power pollution filtration, in particular to a containment top gate leakage filtration system, which comprises: the leakage collecting cavity is covered on a gate at the top of the containment to form a leakage collecting cavity; the air extraction unit comprises an air extraction pipeline, one end of the air extraction pipeline is connected to the side wall of the leakage collection device and is used for extracting the gas in the leakage collection cavity; one end of the water injection unit is connected with a water tank through a pipeline, and the other end of the water injection unit is connected to the side wall of the leakage collection device through a pipeline and is used for injecting liquid into the leakage collection cavity; compared with the prior art, the invention avoids the corrosion and seal aging of the equipment gate which is soaked in water for a long time during normal operation and the inconvenience of opening the equipment gate, greatly shortens the time of material changing, improves the reliability of equipment operation, and improves the operation safety and economy.
Description
Technical Field
The invention relates to the field of nuclear power pollution filtration, in particular to a containment top gate leakage filtration system.
Background
The development of small reactors pays more attention to safety, advancement and economy, new processes, new materials and new technologies are continuously introduced, and the engineering feasibility of the small reactors is fully demonstrated, so that the reactors can run more safely, economically and reliably. The design of placing the containment in the ground is a type considered in the research and development of the current small reactor, is beneficial to the seismic performance of a factory building, and can better resist external flying objects. In the design that the containment vessel is arranged underground, in order to facilitate the maintenance of lifting equipment in the containment vessel, an equipment gate can be arranged at the top of the containment vessel. However, after an accident, radioactive gas may leak to the atmosphere due to the rise of pressure and temperature in the containment vessel, and radioactive substances can be prevented from entering the atmosphere by immersing the equipment gate in water to wash the radioactive gas, but the equipment gate and the seal are corroded and aged after being immersed in water for a long time, so that the reliability of the equipment is affected.
Accordingly, there remains a need in the art for improvements.
Disclosure of Invention
The invention aims to solve the problems of poor reliability, insufficient long-term running durability, corrosion aging and leakage caused by the prior art.
The invention provides a containment top gate leakage filtering system, which comprises:
the leakage collecting cavity is covered on a gate at the top of the containment to form a leakage collecting cavity;
the air extraction unit comprises an air extraction pipeline, one end of the air extraction pipeline is connected to the side wall of the leakage collection device and is used for extracting the gas in the leakage collection cavity;
and one end of the water injection unit is connected with a water tank through a pipeline, and the other end of the water injection unit is connected to the side wall of the leakage collection device through a pipeline and is used for injecting liquid into the leakage collection cavity.
Furthermore, the water injection unit also comprises an isolation valve arranged on a pipeline, and when the isolation valve is in a closed state, the water tank is not communicated with the leakage collecting cavity; when the isolation valve is in an open state, the water tank is communicated with the leakage collection cavity, water flows into the leakage collection cavity until the liquid level in the leakage collection cavity reaches a first liquid level height, and the isolation valve is converted into a closed state.
Further, the position of the first liquid level height is lower than the connecting position of the suction pipeline on the leakage collecting device.
Furthermore, the air extraction unit further comprises a high-pressure air output device and an ejector, the other end of the air extraction pipeline is connected with the input end of the ejector, and the high-pressure air output device is connected with the input end of the ejector.
Further, still include the exhaust pipe, exhaust pipe's one end with leak the top of collection device and be connected, exhaust pipe's the other end and external connection.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention has the beneficial effects that: aiming at the scheme that the equipment gate is arranged at the top of the containment vessel of the nuclear power station, the filtering system for preventing the radioactive leakage caused by the leakage of the equipment gate after an accident is designed, and the diffusion of radioactive substances to the environment is eliminated. The design is provided with a passive air extraction and filtration system, and the passive air extraction and filtration system is started after the pressure in the containment vessel rises after an accident, so that the gas leaking from the collection chamber is discharged into the filter. The passive water tank and the water injection pipeline are arranged, water is injected into the leakage collection cavity after an accident, the equipment gate is submerged, and the aerosol radioactive substances leaked from the equipment gate seal are filtered. An exhaust pipeline is arranged at the top of the leakage collection chamber and used for exhausting gas after water washing and steam generated by heat exchange at the top of the containment. This design starts to bleed and the water injection to leaking the collection cavity after the accident, has avoided the corrosion and the sealed ageing of long-term soaking in aqueous of equipment gate during normal operating to and the inconvenience when equipment gate is opened, shorten the time of reloading greatly, improved the reliability of equipment operation simultaneously, promote operation security and economic nature.
Drawings
FIG. 1 is a schematic view of a leak filtration system provided by the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1, the present invention provides a containment top gate leak filtration system comprising:
the leakage collecting cavity is covered on the gate 2 at the top of the containment 1 to form a leakage collecting cavity 4;
the air extraction unit comprises an air extraction pipeline 7, and one end of the air extraction pipeline 7 is connected to the side wall 3 of the leakage collection device and is used for extracting the gas in the leakage collection cavity 4;
and one end of the water injection unit is connected with a water tank 11 through a water injection pipeline 13, and the other end of the water injection unit is connected to the side wall 3 of the leakage collection device through a pipeline and is used for injecting liquid into the leakage collection cavity 4.
Further, the water injection unit further comprises an isolation valve 12 arranged on a water injection pipeline 13, and when the isolation valve 12 is in a closed state, the water tank 11 is not communicated with the leakage collecting cavity 4; when the isolation valve 12 is in the open state, the water tank 11 is in communication with the leakage collection chamber 4, water flows into the leakage collection chamber 4 until the liquid level in the leakage collection chamber 4 reaches a first liquid level, and the isolation valve 12 is turned to the closed state.
Further, the first liquid level is at a lower level than the connection of the suction line 7 to the side wall 3 of the leak collection device.
Further, the air extraction unit further comprises a high-pressure air output device 9 and an ejector 8, the other end of the air extraction pipeline 7 is connected with the input end of the ejector 8, and the high-pressure air output device 9 is connected with the input end of the ejector 8.
Further, the leakage collecting device further comprises an exhaust pipeline 6, one end of the exhaust pipeline 6 is connected with the cover plate 5 of the leakage collecting device, and the other end of the exhaust pipeline 6 is connected with the outside.
During the normal operation of the unit, the containment vessel 1 is in a micro negative pressure environment, the gate 2 has no leakage risk, the high-pressure air output device 9 and the ejector 8 do not work, the isolation valve 12 is closed, the leakage collection cavity 4 is formed by the top of the containment vessel 1, the side wall 3 of the leakage collection device and the cover plate 5, and the leakage collection cavity 4 is in a dry state. When equipment is maintained, the gate 2 is moved out after the cover plate 5 is moved out, and the equipment in the containment vessel 1 is replaced and maintained. When the maintenance of the equipment is completed, the equipment gate 2 is closed, and the cover plate 5 is closed.
When an accident occurs, the pressure and temperature drop in the containment vessel 1 increases and the gate 2 may leak. The high-pressure air output device 9 is opened, the leakage gas in the leakage collection cavity 4 is sucked and discharged to the filter 10 through the suction line 7 as driving gas through the ejector 8, and the radioactive substances are filtered and then discharged to the atmosphere. Meanwhile, the isolation valve 12 is opened, water in the water tank 11 is injected into the leakage collection cavity 4 through the water injection pipeline 13, the water gradually submerges the gate 2 and reaches a certain liquid level height, at the moment, gas leaked through the gate 2 is firstly filtered in the water, and the gas carrying radioactive substances enters the leakage collection cavity 4 after reaching the discharge requirement through water washing and is discharged to the atmosphere through the exhaust pipeline 6. In the latter period of the accident, the water in the leak collection chamber 4 evaporates and is vented to the atmosphere through the vent line 6.
The process designs a filtering system for preventing radioactive leakage caused by equipment gate leakage after an accident by aiming at the scheme that the equipment gate is arranged at the top of the containment vessel of the nuclear power station, and eliminates the diffusion of radioactive substances to the environment. The design is provided with a passive air extraction and filtration system, and the passive air extraction and filtration system is started after the pressure in the containment vessel rises after an accident, so that the gas leaking from the collection chamber is discharged into the filter. The passive water tank and the water injection pipeline are arranged, water is injected into the leakage collection cavity after an accident, the equipment gate is submerged, and the aerosol radioactive substances leaked from the equipment gate seal are filtered. An exhaust pipeline is arranged at the top of the leakage collection chamber and used for exhausting gas after water washing and steam generated by heat exchange at the top of the containment. This design starts to bleed and the water injection to leaking the collection cavity after the accident, has avoided the corrosion and the sealed ageing of long-term soaking in aqueous of equipment gate during normal operating to and the inconvenience when equipment gate is opened, shorten the time of reloading greatly, improved the reliability of equipment operation simultaneously, promote operation security and economic nature.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (5)
1. A containment top gate leak filtration system, comprising:
the leakage collecting cavity is covered on a gate at the top of the containment to form a leakage collecting cavity;
the air extraction unit comprises an air extraction pipeline, one end of the air extraction pipeline is connected to the side wall of the leakage collection device and is used for extracting the gas in the leakage collection cavity;
and one end of the water injection unit is connected with a water tank through a pipeline, and the other end of the water injection unit is connected to the side wall of the leakage collection device through a pipeline and is used for injecting liquid into the leakage collection cavity.
2. The containment top gate leak filtration system of claim 1, wherein the water injection unit further comprises an isolation valve disposed on the pipeline, the water tank not communicating with the leak collection cavity when the isolation valve is in a closed state; when the isolation valve is in an open state, the water tank is communicated with the leakage collection cavity, water flows into the leakage collection cavity until the liquid level in the leakage collection cavity reaches a first liquid level height, and the isolation valve is converted into a closed state.
3. The containment top gate leak filtration system of claim 2, wherein the first liquid level height is at a location lower than a location where the extraction line connects to the leak collection device.
4. The containment top gate leak filtration system of claim 1, wherein the air extraction unit further comprises a high pressure air output device and an ejector, the other end of the air extraction line is connected with an input end of the ejector, and the high pressure air output device is connected with the input end of the ejector.
5. The containment top gate leak filtration system of claim 1, further comprising an exhaust line, one end of the exhaust line connected to the top of the leak collection device and the other end of the exhaust line connected to the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110360733.6A CN113113160A (en) | 2021-04-02 | 2021-04-02 | Containment top gate leakage filtering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110360733.6A CN113113160A (en) | 2021-04-02 | 2021-04-02 | Containment top gate leakage filtering system |
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| Publication Number | Publication Date |
|---|---|
| CN113113160A true CN113113160A (en) | 2021-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202110360733.6A Pending CN113113160A (en) | 2021-04-02 | 2021-04-02 | Containment top gate leakage filtering system |
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Citations (8)
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|---|---|---|---|---|
| RU2408097C1 (en) * | 2009-12-07 | 2010-12-27 | Учреждение Российской академии наук Институт физической химии и электрохимии им. А.Н. Фрумкина РАН | Cleaning device of inter-cover space |
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| CN105788675A (en) * | 2016-05-06 | 2016-07-20 | 上海核工程研究设计院 | Long-time containment cooling system of nuclear power station |
| CN107170492A (en) * | 2017-03-16 | 2017-09-15 | 中国核电工程有限公司 | It is a kind of to reduce npp safety shell leak materials temperature and the system of wherein radionuclide amount |
| CN107578826A (en) * | 2017-08-18 | 2018-01-12 | 中国舰船研究设计中心 | Containment is constrain and washing filtering integrated system |
| CN107945893A (en) * | 2017-10-09 | 2018-04-20 | 中广核研究院有限公司 | A kind of nuclear power plant's emergence core stacking cool system |
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-
2021
- 2021-04-02 CN CN202110360733.6A patent/CN113113160A/en active Pending
Patent Citations (8)
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| CN107170492A (en) * | 2017-03-16 | 2017-09-15 | 中国核电工程有限公司 | It is a kind of to reduce npp safety shell leak materials temperature and the system of wherein radionuclide amount |
| US20180358136A1 (en) * | 2017-06-09 | 2018-12-13 | Sichuan Xingzhi Zhihui Intellectual Property Operation Co., Ltd. | Containment cooling system capable of improving coolant utilization rate |
| CN107578826A (en) * | 2017-08-18 | 2018-01-12 | 中国舰船研究设计中心 | Containment is constrain and washing filtering integrated system |
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Address after: No. 29 Hong Cao Road, Xuhui District, Shanghai Applicant after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: No. 29 Hong Cao Road, Xuhui District, Shanghai Applicant before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. |
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