CN110570957B - Multistage reciprocating passive cooling system of underground nuclear power station - Google Patents
Multistage reciprocating passive cooling system of underground nuclear power station Download PDFInfo
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- CN110570957B CN110570957B CN201910842605.8A CN201910842605A CN110570957B CN 110570957 B CN110570957 B CN 110570957B CN 201910842605 A CN201910842605 A CN 201910842605A CN 110570957 B CN110570957 B CN 110570957B
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- cooling water
- water tank
- heat source
- underground
- nuclear power
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- 238000001816 cooling Methods 0.000 title claims abstract description 30
- 239000000498 cooling water Substances 0.000 claims abstract description 116
- 238000002347 injection Methods 0.000 claims abstract description 63
- 239000007924 injection Substances 0.000 claims abstract description 63
- 238000004891 communication Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000002035 prolonged effect Effects 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/18—Emergency cooling arrangements; Removing shut-down heat
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
The invention relates to the technical field of underground nuclear power stations and discloses a multistage reciprocating passive cooling system of an underground nuclear power station, which comprises an underground heat source positioned in a mountain body and N cooling water tanks positioned at different heights outside the mountain body, wherein each cooling water tank is connected with the underground heat source through an injection pipe, and control valves are arranged on the injection pipes connected with the underground heat source along the mountain body from top to bottom, wherein the first and third … Nth cooling water tanks are respectively connected with the underground heat source through a control valve. The multistage reciprocating passive cooling system for the underground nuclear power station greatly prolongs the effective operation time of the passive cooling system and improves the safety.
Description
Technical Field
The invention relates to the technical field of underground nuclear power stations, in particular to a multistage reciprocating passive cooling system of an underground nuclear power station.
Background
The underground nuclear power station places nuclear-related plants such as a nuclear island and the like underground, and potential radioactive substances are limited to be released to the environment by utilizing the protection and containment functions of underground rock bodies, so that the safety of the nuclear power station is improved, and a new thought is provided for the safety development of nuclear power in China.
The passive cooling system is designed to be a great outstanding advantage of the third-generation nuclear power, the system is simple in design, no complex external energy drive is needed, reliability is high, and equipment investment is greatly saved compared with a energy system, so that the passive cooling system gradually becomes an advanced design concept of future nuclear power development. However, due to the limitation of arrangement conditions of the ground power station, the operation time of the passive cooling system of the ground power station is usually limited by the input cooling water quantity, and the unstable arrangement of the containment can be caused when the cooling water quantity is too large, so that the operation time of the passive cooling system in the prior art is not long.
The Chinese patent application (publication date: 11-05 in 2014 and publication number: CN 104134474A) discloses an passive cooling system, wherein a condensation water pool arranged outside a containment is used as a final heat sink to conduct heat in the containment, but the water pool needs to be higher than the containment by a certain height, has limited capacity and is short in system input operation time.
The Chinese patent application (publication date: 2014, 01, 22 days, publication number: CN 103531256A) discloses a passive cooling system for a prestressed concrete containment of a pressurized water reactor, wherein a water storage tank is arranged at the top of the containment, the containment is cooled by water in the water storage tank, and the steel containment is replaced by the concrete containment to support a larger cooling water tank, so that the scheme also has the problems of small cooling water quantity and short system operation time.
Disclosure of Invention
The invention aims to overcome the defects of the technology, and provides a multistage reciprocating passive cooling system of an underground nuclear power station, which greatly prolongs the effective operation time of the passive cooling system and improves the safety.
In order to achieve the above purpose, the multistage reciprocating passive cooling system of the underground nuclear power station designed by the invention comprises an underground heat source positioned in a mountain body, and is characterized in that: the system also comprises cooling water tanks located at N different elevations outside the mountain, each cooling water tank is connected with the underground heat source through an injection pipe, and control valves are arranged on the injection pipes connected with the underground heat source along the mountain from top to bottom, wherein the first, third and N … cooling water tanks are respectively connected with the injection pipes connected with the underground heat source.
Preferably, from the third cooling water tank, the injection pipes connected with the odd-numbered cooling water tanks are all communicated with the injection pipes connected with the first cooling water tank, from the fourth cooling water tank, the injection pipes connected with the even-numbered cooling water tanks are all communicated with the injection pipes connected with the second cooling water tank, and the heights of the communication points of the injection pipes are sequentially reduced and are lower than the heights of the cooling water tanks communicated with the injection pipes, so that the engineering cost is greatly reduced through the communication between the injection pipes.
Preferably, the control valve on the injection pipe connected with the first cooling water pool is positioned above all the communication points from top to bottom along the mountain, so that the independent control on the opening and closing of the injection pipe is convenient to control.
Preferably, the height difference between two adjacent cooling water tanks is gradually decreased from top to bottom along the mountain, so as to prolong the cooling duration of the cooling water as much as possible.
Preferably, the minimum difference in elevation between two adjacent cooling water tanks is not less than 10 meters to maintain a sufficient injection pressure.
Compared with the prior art, the invention has the following advantages:
1. by utilizing the arrangement characteristics of the underground nuclear power plant, multistage cooling water tanks are arranged at different elevations of a mountain, the passive cooling system is driven to operate by the elevation difference between the cooling water tanks, and cooling water is enabled to reciprocate among the plurality of cooling water tanks, so that the effective operation time of the passive cooling system is greatly prolonged, the cooling time is prolonged by at least 3 times under the condition of the same cooling water quantity, and the safety is improved;
2. the whole system can be operated passively, and is not required to be pushed by external energy, so that the system is simple and reliable;
3. through the communication between the injection pipes, the engineering cost is greatly reduced.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a multi-stage reciprocating passive cooling system for an underground nuclear power plant.
The reference numerals of the components in the drawings are as follows:
mountain 1, underground heat source 2, first stage cooling water tank 31, second stage cooling water tank 32, third stage cooling water tank 33, fourth stage cooling water tank 34, first stage injection pipe 41, second stage injection pipe 42, third stage injection pipe 43, fourth stage injection pipe 44, first stage control valve 51, third stage control valve 53, fourth stage control valve 54.
Detailed Description
The invention will now be described in further detail with reference to the drawings and to specific examples.
The invention discloses a multistage reciprocating passive cooling system of an underground nuclear power station, which comprises an underground heat source 2 positioned in a mountain 1, and also comprises N cooling water tanks positioned outside the mountain 1 and at different heights, wherein each cooling water tank is connected with the underground heat source 2 through an injection pipe, a control valve is arranged on the injection pipe connected with the underground heat source 2 along the mountain 1 from top to bottom, the first and third … Nth cooling water tanks are respectively connected with the underground heat source 2, the height difference between two adjacent cooling water tanks is gradually decreased from top to bottom along the mountain 1, and the minimum height difference between two adjacent cooling water tanks is not less than 10 meters.
In this embodiment, the underground heat source 2 is a potential heat source of an underground nuclear power station, such as a containment vessel of the underground nuclear power station, a secondary side of a steam generator, a heat sink of a waste heat discharging system, and the like.
When the underground heat source 2 is required to be cooled, the control valves are firstly closed, the control valves on the injection pipe connected with the first cooling water tank are firstly opened, under the neutral effect, the cooling water in the first cooling water tank flows into the underground heat source 2 along the injection pipe, after the cooling water completes heat exchange at the underground heat source 2, the temperature of the cooling water rises, and due to the action of the differential pressure of the height difference between the first cooling water tank and the second cooling water tank, the cooling water in the first cooling water tank continuously enters the underground heat source 2 through the injection pipe connected with the first cooling water tank and then flows to the second cooling water tank through the injection pipe connected with the second cooling water tank, and in the process, the heat in the underground heat source 2 is continuously taken out of the ground.
After the water pressure in the first cooling water tank and the second cooling water tank is balanced, a control valve on an injection pipe connected with the third cooling water tank is opened, and likewise, cooling water enters the underground heat source 2 through the injection pipe connected with the second cooling water tank under the action of the difference of the height difference between the second cooling water tank and the third cooling water tank, and then flows to the third cooling water tank through the injection pipe connected with the third cooling water tank, and in the process, the heat in the underground heat source 2 is continuously carried out of the ground.
By analogy, by continuously opening a control valve on an injection pipe connected with a subsequent cooling water tank, cooling water can enter a next cooling water tank from a previous cooling water tank after passing through the underground heat source 2, and continuously brings heat in the underground heat source 2 out of the ground, so that the cooling water reciprocates among a plurality of cooling water tanks, and the effective operation time of the passive cooling system is greatly prolonged.
In another embodiment, as shown in fig. 1, the multi-stage reciprocating passive cooling system of the underground nuclear power station comprises an underground heat source 2 positioned in a mountain 1, and further comprises four cooling water tanks positioned at different heights outside the mountain 1, namely a first-stage cooling water tank 31, a second-stage cooling water tank 32, a third-stage cooling water tank 33 and a fourth-stage cooling water tank 34 which are arranged from top to bottom along the mountain 1, wherein the height difference between two adjacent cooling water tanks is sequentially decreased, the minimum height difference between two adjacent cooling water tanks is not less than 10 meters, the four cooling water tanks are respectively connected with the underground heat source 2 through a first-stage injection pipe 41, a second-stage injection pipe 42, a third-stage injection pipe 43 and a fourth-stage injection pipe 44, meanwhile, the first-stage injection pipe 41 is provided with a first-stage control valve 51, the third-stage injection pipe 43 is provided with a third-stage control valve 53, and the fourth-stage injection pipe 44 is provided with a fourth-stage control valve 54.
In addition, in the present embodiment, the third stage injection pipe 43 is communicated with the first stage injection pipe 41, the height of the communication point is lower than the height of the third stage cooling water tank 33, and is located below the first stage control valve 51, the fourth injection pipe 44 is communicated with the second stage injection pipe 42, the height of the communication point is lower than the height of the fourth stage cooling water tank 34, and the height of the communication point of the fourth injection pipe 44 is lower than the height of the communication point of the third injection pipe 43.
In this embodiment, the underground heat source 2 is a potential heat source of an underground nuclear power station, such as a containment vessel of the underground nuclear power station, a secondary side of a steam generator, a heat sink of a waste heat discharging system, and the like.
When the embodiment is used, the third-stage control valve 53 and the fourth-stage control valve 54 are kept closed, the first-stage control valve 51 is opened, the cooling water in the first-stage cooling water tank 31 flows into the underground heat source 2 along the first-stage injection pipe 41 under the action of gravity, the cooling water completes heat exchange at the underground heat source 2, the temperature of the cooling water is increased, the cooling water in the first-stage cooling water tank 31 continuously enters the underground heat source 2 through the first-stage injection pipe 41 under the action of the high-level difference pressure difference between the first-stage cooling water tank 31 and the second-stage cooling water tank 32, and then enters the second-stage cooling water tank 32 through the second-stage injection pipe 42, and in the process, the heat in the underground heat source 2 is continuously taken out of the ground.
After the water pressure in the first stage cooling water tank 31 and the second stage cooling water tank 32 is balanced, the third stage control valve 53 is opened, and the cooling water in the second stage cooling water tank 32 enters the underground heat source 2 through the second stage injection pipe 42 under the action of the differential pressure of the height difference between the second cooling water tank 32 and the third stage cooling water tank 33, and then enters the third cooling water tank 33 through the first injection pipe 41 and the third injection pipe 43 in sequence, and in the process, the heat in the underground heat source 2 is continuously carried out of the ground.
After the water pressure in the second-stage cooling water tank 32 and the third-stage cooling water tank 33 is balanced, the fourth-stage control valve 54 is opened, and the cooling water in the third-stage cooling water tank 33 sequentially enters the underground heat source 2 through the third-stage injection pipe 42 and the first-stage injection pipe 41 under the action of the difference of the height difference pressure between the third-stage cooling water tank 33 and the fourth-stage cooling water tank 34, and then sequentially enters the fourth cooling water tank 34 through the second injection pipe 42 and the fourth injection pipe 44, so that heat in the underground heat source 2 is continuously carried out of the ground in the process.
In the working process of the whole embodiment, the height difference of the cooling water through the multistage cooling water tanks is reduced, the underground heat source 2 is repeatedly cooled in a reciprocating mode, and the cooling duration is prolonged by 3 times under the condition of the same amount of cooling water.
According to the multistage reciprocating passive cooling system of the underground nuclear power station, multistage cooling water tanks are arranged at different elevations of the mountain 1 by utilizing the arrangement characteristics of the underground nuclear power station, the passive cooling system is driven to operate by the elevation difference among the cooling water tanks, and cooling water is enabled to reciprocate among a plurality of cooling water tanks, so that the effective operation time of the passive cooling system is greatly prolonged, the cooling time is prolonged by at least 3 times under the condition of the same cooling water quantity, and the safety is improved; the whole system can be operated passively, and is not required to be pushed by external energy, so that the system is simple and reliable; and the engineering cost is greatly reduced through the communication between the injection pipes.
Claims (2)
1. The utility model provides an underground nuclear power station multistage reciprocating type passive cooling system, is including being located underground heat source (2) in mountain body (1), its characterized in that: the cooling water treatment device is characterized by further comprising N cooling water tanks located at different heights outside the mountain (1), wherein each cooling water tank is connected with the underground heat source (2) through an injection pipe, the first … Nth cooling water tank is connected with the underground heat source (2) from top to bottom along the mountain (1), control valves are arranged on the injection pipes connected with the underground heat source (2) along the mountain (1) from top to bottom, the injection pipes connected with the odd-numbered cooling water tanks are communicated with the injection pipes connected with the first cooling water tank, the injection pipes connected with the even-numbered cooling water tanks are communicated with the injection pipes connected with the second cooling water tank from the fourth cooling water tank, the heights of the communication points of the injection pipes are sequentially reduced and are lower than the heights of cooling water tanks communicated with the injection pipes, the heights of two adjacent cooling water tanks are sequentially reduced from top to bottom along the mountain (1), and the heights of the two adjacent cooling water tanks are sequentially reduced by less than 10 m.
2. The multi-stage reciprocating passive cooling system of an underground nuclear power plant of claim 1, wherein: and the control valve on the injection pipe connected with the first cooling water pool is positioned above all the communication points from top to bottom along the mountain (1).
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| CN201910842605.8A CN110570957B (en) | 2019-09-06 | 2019-09-06 | Multistage reciprocating passive cooling system of underground nuclear power station |
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| CN201910842605.8A CN110570957B (en) | 2019-09-06 | 2019-09-06 | Multistage reciprocating passive cooling system of underground nuclear power station |
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| CN110570957A CN110570957A (en) | 2019-12-13 |
| CN110570957B true CN110570957B (en) | 2024-04-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113539528B (en) * | 2021-07-30 | 2024-10-11 | 长江勘测规划设计研究有限责任公司 | Passive circulating cooling system of underground nuclear power station and application method thereof |
| CN115223736A (en) * | 2022-07-05 | 2022-10-21 | 中国原子能科学研究院 | Underground nuclear power supply |
| CN115331849A (en) * | 2022-09-14 | 2022-11-11 | 上海核工程研究设计院有限公司 | Passive residual heat removal system and method for nuclear reactor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140126187A (en) * | 2013-04-22 | 2014-10-30 | 한국원자력연구원 | Passive safety system and nuclear power plant having the same |
| CN104134474A (en) * | 2014-07-30 | 2014-11-05 | 中科华核电技术研究院有限公司 | Passive cooling system |
| WO2016011569A1 (en) * | 2014-07-24 | 2016-01-28 | 哈尔滨工程大学 | Containment cooling system, and containment and reactor pressure vessel joint cooling system |
| CN210956183U (en) * | 2019-09-06 | 2020-07-07 | 长江勘测规划设计研究有限责任公司 | Multistage reciprocating passive cooling system of underground nuclear power station |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5876320B2 (en) * | 2012-02-23 | 2016-03-02 | 日立Ｇｅニュークリア・エナジー株式会社 | Nuclear power plant |
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- 2019-09-06 CN CN201910842605.8A patent/CN110570957B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140126187A (en) * | 2013-04-22 | 2014-10-30 | 한국원자력연구원 | Passive safety system and nuclear power plant having the same |
| WO2016011569A1 (en) * | 2014-07-24 | 2016-01-28 | 哈尔滨工程大学 | Containment cooling system, and containment and reactor pressure vessel joint cooling system |
| CN104134474A (en) * | 2014-07-30 | 2014-11-05 | 中科华核电技术研究院有限公司 | Passive cooling system |
| CN210956183U (en) * | 2019-09-06 | 2020-07-07 | 长江勘测规划设计研究有限责任公司 | Multistage reciprocating passive cooling system of underground nuclear power station |
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| Title |
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| 发展无严重事故风险核电站的曙光 具有完全非能动安全冷却系统的压水堆核电站;肖宏才;;核科学与工程(第02期);全文 * |
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