CN105448357A - Containment shell cooling system of floating nuclear power plant - Google Patents
Containment shell cooling system of floating nuclear power plant Download PDFInfo
- Publication number
- CN105448357A CN105448357A CN201610003799.9A CN201610003799A CN105448357A CN 105448357 A CN105448357 A CN 105448357A CN 201610003799 A CN201610003799 A CN 201610003799A CN 105448357 A CN105448357 A CN 105448357A
- Authority
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- China
- Prior art keywords
- containment
- cooling system
- seawater
- pipeline
- nuclear power
- 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.)
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Links
- 238000001816 cooling Methods 0.000 title claims abstract description 81
- 239000013535 sea water Substances 0.000 claims abstract description 45
- 230000002209 hydrophobic effect Effects 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 238000002955 isolation Methods 0.000 claims description 16
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 230000001066 destructive effect Effects 0.000 claims description 8
- 238000007654 immersion Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 6
- 239000000498 cooling water Substances 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007921 spray 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
- G21C15/182—Emergency cooling arrangements; Removing shut-down heat comprising powered means, e.g. pumps
-
- 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 provides a containment shell cooling system of a floating nuclear power plant. The containment shell cooling system comprises a containment shell, a covering shell and a cooling cavity, wherein the covering shell is arranged outside the containment shell; the cooling cavity is formed by the covering shell and the containment shell; seawater is introduced into the cooling cavity for cooling the containment shell by the cooling system via a siphon phenomenon. The containment shell cooling system has the advantages that seawater is used as cooling water; atmosphere is used as a final hot trap; the seawater is introduced into the cooling cavity for cooling the containment shell via the siphon phenomenon; the overpressure of the containment is ensured; the integrality of the containment shell is maintained; the advantages of simplicity and reliability are realized.
Description
Technical field
The present invention relates to a kind of safety system of floating nuclear power plant, particularly relate to a kind of containment cooling system.
Background technology
When conventional pressurized water piles up loss of-coolant accident (LOCA) or containment internal steam pipe road break accident, utilize containment spray system to discharge heat in containment, reduce containment pressure and temperature, to reach the integrality maintaining containment.When there is above-mentioned accident, third generation passive PWR nuclear power station utilizes steel containment vessel as a heating surface, and heat in the condensation of containment inside surface and heated interior surfaces, is then passed to steel sheel by heat conduction by steam.The box hat outside surface be heated, by heat transfer mechanisms such as convection current, radiation and evaporations, is cooled by water and air.Water is provided by containment top water tank, heat is taken out of by the air of Natural Circulation with the form of sensible heat and water vapor, air from environment is often opened runner by one and is entered, rise along containment outer wall, return environment eventually through a high-order exhausr port, realize the object taking away heat in containment.
In conventional pressurized water heap, the realization of ultimate heat sink function need rely on rotating machinery, and in the containment cooling system of third generation passive PWR nuclear power station, the capacity of containment top water tank is limited.For floating nuclear power plant, seawater is inexhaustible, use not to the utmost.Floating nuclear power plant can using seawater as chilled water, if can design a kind of containment cooling system with long-term refrigerating function, make heat enter air, by making, the safety system of floating nuclear power plant is more safe and reliable.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, propose a kind of containment cooling system utilizing siphonage seawater to be introduced cooling chamber to cool containment.
The containment cooling system of floating nuclear power plant provided by the invention comprises containment, is arranged at the involucrum of described containment outside, and the cooling chamber formed between described involucrum and described containment, described cooling system utilizes siphonage seawater to be introduced described cooling chamber and cools described containment; Wherein, siphon piping is set between seawater and described cooling chamber; Wherein, exhaust line is set between described cooling chamber and air; Chilled water collector, chilled water water injection pipe and vacuum extractor is also provided with in described cooling chamber; When having an accident and need described containment as ultimate heat sink, seawater is driven to flow into described siphon piping and be assigned in described chilled water water injection pipe by described chilled water collector by the vacuum ejector in described vacuum extractor, make seawater flow to described containment surface and make described containment keep depth of immersion, make turn seawater be the heat that steam takes away in described containment by heat exchange, eventually through described steam discharge pipeline by heat discharged to air; Wherein, described chilled water collector is arranged on described vacuum ejector exit, and described chilled water water injection pipe around described containment circumferentially, flows to described containment surface to make seawater and makes described containment keep depth of immersion; Wherein, described steam discharge pipeline is arranged on the top of described cooling chamber; Wherein, described cooling system also comprises hydrophobic pipeline and drainage pump, and it is arranged on bottom described cooling chamber, for discharging the seawater in cooling chamber when running without the need to containment cooling system; Wherein, described vacuum extractor also comprises gas cylinder as driving gas.
Preferably, described cooling system also comprises: siphon destructive valve, and it is arranged on the siphon destructive pipeline that is connected with described siphon piping; Driving gas isolation valve, it is arranged on the driving gas pipeline that is connected with described gas cylinder; And hydrophobic pipeline isolation valve, it is arranged on described hydrophobic pipeline.
Preferably, described hydrophobic pipeline comprises hydrophobic inlet line and hydrophobic discharge pipe, and described hydrophobic inlet line, described hydrophobic pipeline isolation valve, described drainage pump are connected successively with described hydrophobic discharge pipe.
Preferably, described gas cylinder, driving gas non-return valve, described driving gas isolation valve, described driving gas pipeline are connected successively with described vacuum ejector.
Preferably, filter screen is set in described siphon piping porch.
Preferably, described cooling system comprises at least two siphon loops.
Compared with prior art, the present invention has following beneficial effect:
1. the present invention devises involucrum outside containment, cooling chamber is formed between involucrum and containment, by the setting of cooling chamber, using seawater as chilled water, be ultimate heat sink with air, utilize siphonage that seawater is introduced cooling chamber and containment is cooled, ensure containment not superpressure, maintain the integrality of containment, there is simple and reliable advantage.
2. between seawater and cooling chamber, be provided with siphon piping and drive seawater to flow into U trap by vacuum extractor, perforate below the liquid level of sea level can be avoided to cause seawater to leak.
3. be provided with chilled water collector and around containment chilled water water injection pipe circumferentially, be assigned in chilled water water injection pipe circumferentially by chilled water collector, making cooling water flow to containment surface and certain depth of immersion that containment is kept.
4. considering based on redundancy, being provided with two siphon loops, for ensureing the availability of system.
Accompanying drawing explanation
Fig. 1 is the front view of the containment cooling system general flow chart of floating nuclear power plant.
Fig. 2 is the partial top view of the containment cooling system general flow chart of floating nuclear power plant.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
In order to understand the present invention more clearly, operate to example below with containment system, composition graphs 1 and the containment cooling system of Fig. 2 to floating nuclear power plant of the present invention are described further.
As depicted in figs. 1 and 2, the containment cooling system of the floating nuclear power plant of embodiments of the invention, comprise containment 1, be arranged at the involucrum 2 of containment outside, and the cooling chamber 3 formed between involucrum 1 and containment 2, described cooling system utilizes siphonage seawater to be introduced cooling chamber's 3 pairs of containments 1 and cools.The present invention, using seawater as chilled water, is ultimate heat sink with air, utilizes siphonage that seawater is introduced cooling chamber and cools containment, ensures containment not superpressure, maintains the integrality of containment, has simple and reliable advantage.
As shown in Figure 1, siphon piping 5 is set between seawater and described cooling chamber, avoids perforate below the liquid level of sea level to cause seawater to leak.Exhaust line 15 is set between cooling chamber 3 and air; Chilled water collector 9, chilled water water injection pipe 10 and vacuum extractor is also provided with in cooling chamber 3.When having an accident and need described containment as ultimate heat sink, seawater is driven to flow into siphon piping 5 and be assigned in chilled water water injection pipe 10 by described chilled water collector 9 by the vacuum ejector 8 in described vacuum extractor, seawater is made to flow to containment 1 surface and make containment 1 keep depth of immersion, make turn seawater be the heat that steam takes away in described containment by heat exchange, eventually through steam discharge pipeline 15 by heat discharged to air.
As depicted in figs. 1 and 2, chilled water collector 9 is arranged on described vacuum ejector exit; Wherein, chilled water water injection pipe 10 around containment 1 circumferentially, flows to containment 1 surface to make seawater and makes containment 1 keep depth of immersion.Such as, around containment 1 circumferentially, chilled water water injection pipe 10 is distributed in circumference on chilled water collector 9 and is evenly arranged chilled water collector 9, injects chilled water to reach to containment 1.
As shown in Figure 1, described steam discharge pipeline is arranged on the top of described cooling chamber; Described cooling system also comprises hydrophobic pipeline and drainage pump 18, and it is arranged on bottom cooling chamber 3, for discharging the seawater in cooling chamber 3 when running without the need to containment cooling system.
As shown in Figure 1, described vacuum extractor also comprises gas cylinder 14 as driving gas.
Preferably, as shown in Figure 1, described cooling system also comprises: siphon destructive valve 7, and it is arranged on the siphon destructive pipeline 6 that is connected with siphon piping 5; Driving gas isolation valve 12, it is arranged on the driving gas pipeline 11 that is connected with described gas cylinder; And hydrophobic pipeline isolation valve 17, it is arranged on described hydrophobic pipeline.The containment cooling system of described floating nuclear power plant is arranged in floating nuclear power plant dividing plate, and when power station is normally run, containment system is in stand-by state, siphon destructive valve 7 is closed, driving gas isolation valve 12 cuts out, and hydrophobic pipeline isolation valve 17 cuts out, and cooling chamber 3 is communicated with air.
Preferably, as shown in Figure 1, described hydrophobic pipeline comprises hydrophobic inlet line 16 and hydrophobic discharge pipe 19.Wherein, hydrophobic inlet line 16, hydrophobic pipeline isolation valve 17, drainage pump 18 are connected successively with hydrophobic discharge pipe 19.When running without the need to containment cooling system, siphon destructive valve 7 can be opened and stop seawater inflow cooling chamber 3, then opening hydrophobic pipeline isolation valve 17, utilizing drainage pump 18 to be discharged through hydrophobic discharge pipe 19 by seawater.
Preferably, as shown in Figure 1, gas cylinder 14, driving gas non-return valve 13, driving gas isolation valve 12, driving gas pipeline 11 are connected successively with vacuum ejector 8.
Preferably, as shown in Figure 1, filter screen 4 is set in siphon piping 5 porch.
Preferably, as depicted in figs. 1 and 2, when having an accident and need containment system as ultimate heat sink, open driving gas isolation valve 12, gas in gas cylinder 14 enters vacuum ejector 8 through driving gas pipeline 11, air in U trap 5 is extracted out, pressure reduction is formed between seawater and U trap 5, thus seawater enters U trap 5 through U trap inlet screen 4, chilled water collector 9 is entered through vacuum ejector 8, flow to containment Surface absorption heat through supercooled water water injection pipe 10 again, the final seawater maintained in cooling chamber floods height.Seawater is converted to steam after heat absorption, and steam enters air through steam discharge pipeline 15, thus takes away the heat in containment.
Preferably, described cooling system comprises at least two siphon loops, and the design of at least two siphon loops herein considers, for ensureing the availability of system based on redundancy.Wherein, 4 ~ 8,10 ~ 14 is pipeline and the equipment of siphon loop 1,4 ' ~ 8 ', 10 ' ~ 14 ' be siphon loop 2 pipeline and equipment, the mark one_to_one corresponding of itself and siphon loop 1.
See figures.1.and.2, said structure and the course of work are equally applicable to respective lines and the equipment of siphon loop 2.
Compared with prior art, the present invention has following beneficial effect:
1. the present invention devises involucrum outside containment, cooling chamber is formed between involucrum and containment, by the setting of cooling chamber, using seawater as chilled water, be ultimate heat sink with air, utilize siphonage that seawater is introduced cooling chamber and containment is cooled, ensure containment not superpressure, maintain the integrality of containment, there is simple and reliable advantage.
2. between seawater and cooling chamber, be provided with siphon piping and drive seawater to flow into U trap by vacuum extractor, perforate below the liquid level of sea level can be avoided to cause seawater to leak.
3. be provided with chilled water collector and around containment chilled water water injection pipe circumferentially, be assigned in chilled water water injection pipe circumferentially by chilled water collector, making cooling water flow to containment surface and certain depth of immersion that containment is kept.
Considering based on redundancy, being provided with two siphon loops, for ensureing the availability of system.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For system disclosed in embodiment, owing to corresponding to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
Those skilled in the art can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
Obviously, those skilled in the art can carry out various change and modification to invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (6)
1. the containment cooling system of a floating nuclear power plant, it is characterized in that, described cooling system comprises containment, is arranged at the involucrum of described containment outside, and the cooling chamber formed between described involucrum and described containment, described cooling system utilizes siphonage seawater to be introduced described cooling chamber and cools described containment;
Wherein, exhaust line is set between described cooling chamber and air;
Chilled water collector, chilled water water injection pipe and vacuum extractor is also provided with in described cooling chamber;
When having an accident and need described containment as ultimate heat sink, seawater is driven to flow into described siphon piping and be assigned in described chilled water water injection pipe by described chilled water collector by the vacuum ejector in described vacuum extractor, make seawater flow to described containment surface and make described containment keep depth of immersion, make turn seawater be the heat that steam takes away in described containment by heat exchange, eventually through described steam discharge pipeline by heat discharged to air;
Wherein, described chilled water collector is arranged on described vacuum ejector exit, and described chilled water water injection pipe around described containment circumferentially, flows to described containment surface to make seawater and makes described containment keep depth of immersion;
Wherein, described steam discharge pipeline is arranged on the top of described cooling chamber;
Wherein, described cooling system also comprises hydrophobic pipeline and drainage pump, and it is arranged on bottom described cooling chamber, for discharging the seawater in cooling chamber when running without the need to containment cooling system;
Wherein, described vacuum extractor also comprises gas cylinder as driving gas.
2. the containment cooling system of floating nuclear power plant as claimed in claim 1, it is characterized in that, described cooling system also comprises: siphon destructive valve, and it is arranged on the siphon destructive pipeline that is connected with described siphon piping; Driving gas isolation valve, it is arranged on the driving gas pipeline that is connected with described gas cylinder; And hydrophobic pipeline isolation valve, it is arranged on described hydrophobic pipeline.
3. the containment cooling system of floating nuclear power plant as claimed in claim 2, it is characterized in that, described hydrophobic pipeline comprises hydrophobic inlet line and hydrophobic discharge pipe, and described hydrophobic inlet line, described hydrophobic pipeline isolation valve, described drainage pump are connected successively with described hydrophobic discharge pipe.
4. the containment cooling system of floating nuclear power plant as claimed in claim 2, it is characterized in that, described gas cylinder, driving gas non-return valve, described driving gas isolation valve, described driving gas pipeline are connected successively with described vacuum ejector.
5. the containment cooling system of floating nuclear power plant as claimed in claim 1, is characterized in that, arrange filter screen in described siphon piping porch.
6. the containment cooling system of the floating nuclear power plant as described in claim 1-5, is characterized in that, described cooling system comprises at least two siphon loops.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610003799.9A CN105448357B (en) | 2016-01-04 | 2016-01-04 | Containment cooling system of floating nuclear power station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610003799.9A CN105448357B (en) | 2016-01-04 | 2016-01-04 | Containment cooling system of floating nuclear power station |
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| Publication Number | Publication Date |
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| CN105448357A true CN105448357A (en) | 2016-03-30 |
| CN105448357B CN105448357B (en) | 2024-05-14 |
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| CN201610003799.9A Active CN105448357B (en) | 2016-01-04 | 2016-01-04 | Containment cooling system of floating nuclear power station |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105825899A (en) * | 2016-05-06 | 2016-08-03 | 上海核工程研究设计院 | Containment cooling system of nuclear power station |
| CN106875988A (en) * | 2017-02-15 | 2017-06-20 | 中广核研究院有限公司 | Band has surplus heat the ocean reactor system platform of remover |
| WO2021213416A1 (en) * | 2020-04-24 | 2021-10-28 | 上海核工程研究设计院有限公司 | Passive waste heat removal system on secondary side of marine environmental reactor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105825899A (en) * | 2016-05-06 | 2016-08-03 | 上海核工程研究设计院 | Containment cooling system of nuclear power station |
| CN106875988A (en) * | 2017-02-15 | 2017-06-20 | 中广核研究院有限公司 | Band has surplus heat the ocean reactor system platform of remover |
| WO2021213416A1 (en) * | 2020-04-24 | 2021-10-28 | 上海核工程研究设计院有限公司 | Passive waste heat removal system on secondary side of marine environmental reactor |
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