WO2014048293A1 - Combined active and passive containment vessel heat removal apparatus - Google Patents
Combined active and passive containment vessel heat removal apparatus Download PDFInfo
- Publication number
- WO2014048293A1 WO2014048293A1 PCT/CN2013/084049 CN2013084049W WO2014048293A1 WO 2014048293 A1 WO2014048293 A1 WO 2014048293A1 CN 2013084049 W CN2013084049 W CN 2013084049W WO 2014048293 A1 WO2014048293 A1 WO 2014048293A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- containment
- heat exchanger
- heat
- passive
- spray
- Prior art date
Links
- 239000007921 spray Substances 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000000126 substance Substances 0.000 claims description 8
- 239000000654 additive Substances 0.000 claims description 7
- 230000000996 additive effect Effects 0.000 claims description 7
- 230000017525 heat dissipation Effects 0.000 claims description 7
- 230000000630 rising effect Effects 0.000 claims description 7
- 230000001174 ascending effect Effects 0.000 claims description 4
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 229910052740 iodine Inorganic materials 0.000 description 3
- 239000011630 iodine Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013589 supplement 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
Definitions
- Safety shell heat discharging device combining active and passive
- the invention belongs to a reactor design technology, and particularly relates to a containment heat removal device combining active and passive. Background technique
- the containment heat removal system of a traditional nuclear power plant uses a containment spray system to remove heat and radioactive materials entering the containment to control the environmental conditions of the containment.
- the purpose of the containment spray system is to spray cold water from the top of the containment at the appropriate time, to cool the atmosphere of the containment, and to limit the peak pressure of the containment after L0CA or MSLB.
- chemicals are added to the spray as necessary to remove suspended iodine and iodine vapor from the containment atmosphere.
- the active safety shell spray system has the characteristics of strong cooling capacity and good thermal efficiency after accident, and has been widely used. However, this technology relies too much on AC power. When a plant-wide power failure stacking L0CA or MSLB accident occurs, long-term effective heat rejection of the containment cannot be achieved.
- the representative of the passive containment heat removal device is the AP1 000 passive containment cooling system.
- the passive containment cooling system passively dissipates heat from the containment to the final heat sink-atmosphere, as shown in Figure 1.
- air enters from the top inlet 1 of the shield structure, flows through the descending passage and then passes through the ascending flow path, taking away the heat transferred from the wall of the steel containment vessel, and finally draining from the chimney to the environment, above the containment Set the gravity water tank 2.
- the system After receiving the high pressure signal from the containment, the system automatically starts after the accident. Just turn on any of the three normally closed isolation valves and start the system without any other action. System startup can also be initiated manually by the operator in the main control room or remote shutdown station.
- the purpose of the invention is to provide a safety shell heat removal device combining the active and passive phases for the defects of the safety shell heat removal system of the conventional nuclear power plant, improve the dependence of the traditional active safety system nuclear power plant on the safety level power supply, and improve the nuclear power plant safety shell row.
- the inherent safety of the thermal system is to provide a safety shell heat removal device combining the active and passive phases for the defects of the safety shell heat removal system of the conventional nuclear power plant, improve the dependence of the traditional active safety system nuclear power plant on the safety level power supply, and improve the nuclear power plant safety shell row.
- a movable shell heat removal device comprising a safety shell spray system and a passive containment heat release system, wherein one end of the pipeline of the safety shell spray system is connected a water tank, the other end of which is connected to a spray header at the top of the containment vessel via a spray pump and a heat exchanger;
- the passive containment heat removal system includes a heat exchanger or a heat exchanger set disposed inside the containment vessel
- the heat exchanger or the heat exchanger group is connected to the heat exchange water tank disposed outside the safety shell through the rising pipeline and the descending pipeline, and the height of the heat exchange water tank is higher than the height of the heat exchanger or the heat exchanger group.
- the active and passive movable containment heat removal device wherein a chemical additive tank is connected to an upstream line of the containment spray system spray pump.
- the active and passive combined containment heat removal device wherein the spray header of the containment spray system is disposed at different elevations on the top of the containment.
- the active and passive combined containment heat removal device wherein the refueling water tank connected to the pipeline of the containment spray system is disposed at a pit position below the inner core of the containment vessel, The spray pump, heat exchanger and chemical additive tank are disposed outside the containment vessel.
- the active and passive combined containment heat removal device wherein a steam-water separator is disposed in the heat exchange water tank outside the containment, and the passive containment heat-dissipating system
- the riser line of the heat exchanger or heat exchanger group is connected to the steam separator.
- an isolation valve is respectively disposed on the rising line and the descending line of the passive containment heat-dissipating system.
- the active-shell heat-dissipating device combined with the active and the passive, as described above, wherein the heat exchange water tank is a closed reinforced concrete structure and is provided with a stainless steel village.
- the beneficial effects of the present invention are as follows:
- the containment heat removal device provided by the present invention can cope with design basis accidents by means of active and passive combination, and at the same time, can exceed the design default accident, serious accident or active in the whole plant power failure.
- Continuously discharging the heat inside the containment under the failure or failure condition of the containment heat removal device improves the inherent safety of the system, improves the dependence of the traditional active safety system nuclear power plant on the safety-grade power supply, and improves the safety of the nuclear power plant. , can effectively maintain the integrity of the containment.
- Figure 1 is a schematic view showing the structure of the AP1 000 passive containment cooling system
- FIG. 2 is a schematic view showing the structure of the heat dissipation device of the containment combined with the active and the passive. detailed description
- the containment heat removal device combines the active containment spray system with the passive containment heat release system.
- One end of the pipeline of the containment spray system is connected to the refueling water tank, and the other end is connected to the spray header at the top of the containment through the spray pump and the heat exchanger; the passive containment heat removal system
- a heat exchanger or a heat exchanger group disposed inside the containment vessel is connected, and the heat exchanger or heat exchanger group is connected to a heat exchange water tank disposed outside the containment vessel through an ascending pipeline and a descending pipeline.
- the active containment spray system (cylinder called CSP system) is used to design the heat removal of the containment under standard accident conditions. Under accident conditions (L0CA or steam pipe rupture in the containment), when the pressure inside the containment is When the temperature rises to a certain value, the pressure and temperature of the containment are reduced to an acceptable level to maintain the integrity of the containment.
- the passive containment heat removal system (PCS system) is used for long-term heat removal of containment under super-design basis accident conditions, including accidents related to plant-wide power outages and sprinkler system failures. The PCS system is also used for accident relief in severe accident conditions (if an overdesign basis accident develops into a serious accident where the core is significantly degraded).
- the active and passive containment heat removal device includes a containment spray system (CSP system) and a passive containment heat removal system (PCS system), and the safety shell spray system
- CSP system containment spray system
- PCS system passive containment heat removal system
- One end of the pipeline is connected to the refueling tank 2, and the other end is connected to the spray header 9 at the top of the containment through the spray pump 3 and the heat exchanger 4.
- the spray header 9 is located at the top of the containment
- a chemical additive tank 5 is connected to the upstream line of the spray pump 3, and the chemical additive tank is used for adding NaOH, which is used for adsorbing volatile iodine in the air; and increasing the pH of the spray water to avoid Structural material corrosion.
- the refueling water tank 2 can be disposed outside the safety shell or in the safety shell. In a preferred solution, the refueling water tank 2 is disposed at a pit position below the core of the safety shell, and the refueling water tank is located at the lowest point. It is a collection of water from the safety shell spray and pipe breakage.
- the spray pump 3, the heat exchanger 4, and the chemical additive tank 5 are all disposed outside the containment vessel.
- the active safety shell heat removal device is a CSP system.
- the CSP system pumps the spray water from the internal or external displacement water tank to the spray line through a spray pump (electric pump), and sprays cooling water into the safety shell to continuously reduce the safety shell.
- the internal temperature rises and pressures caused by an accident.
- the passive containment heat removal system includes a heat exchanger or heat exchanger group 6 disposed inside the containment vessel 1, and the heat exchanger or heat exchanger group 6 passes through an ascending pipeline and a descending pipeline. It is connected to the heat exchange water tank 7 provided outside the containment vessel, and the height of the heat exchange water tank 7 is higher than the height of the heat exchanger or the heat exchanger group 6.
- a steam-water separator 8 is disposed in the heat exchange water tank 7, and the rising pipeline of the heat exchanger or the heat exchanger group 6 is connected with the steam-water separator 8, respectively, on the rising pipeline and the descending pipeline of the passive containment heat-releasing system Isolation valves 10, 11 are provided.
- the PCS system adopts the passive design concept, which uses the heat exchanger or heat exchanger set in the containment to condense, convect and radiate heat with the high temperature air inside the containment.
- the cooling water of the heat exchanger heat sink absorbs the inside of the containment.
- the heat of the high temperature air is raised, the density is lowered, and the density of the water formed in the cold pipe section is poor.
- the steam separator entering the heat exchange water tank through the rising pipeline is cooled by the heat exchange water tank, and then flows back to the heat exchanger through the descending pipeline to complete the natural circulation. .
- the final heat sink of the heat exchange water tank installed outside the containment is the atmosphere, and the heat in the heat exchanger tube is continuously brought outside the containment through the flow of water in the heat exchanger tube to realize the super design basis accident and serious accident work. Under the condition, the passive containment heat is continuously discharged.
- the PCS system is provided with three columns, each series including a set of heat exchangers, a steam-water separator, a heat exchange water tank, an electric isolation valve, and two parallel pneumatic valves (located in the descending line).
- the heat exchanger is arranged on the circumference inside the containment;
- the heat exchange water tank is a device in a reinforced concrete structure stainless steel village, and is arranged in a ring-shaped building with a double-layered containment shell.
- the CSP system After the design basis accident safety shell pressure reaches the threshold, the CSP system automatically triggers the start, or is manually turned on by the operator to discharge the heat inside the containment.
- the PCS system adopts passive technology. When the whole plant is powered off, the system is automatically put into operation without operator intervention, using natural circulation. Long-term heat rejection of the containment. The containment heat removal time is maintained for at least 72 hours without operator intervention, and other hydration methods can be considered after 72 hours.
- the invention adopts the combination of active and passive to derive the heat in the safety shell, can maintain the integrity of the safety shell, and meets the integrity of the safety shell in the Nuclear Safety Plant Design Safety Regulations of China Nuclear Safety Regulations HAF102 (2004). And the requirements for heat removal from the containment.
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- 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
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1504154.4A GB2520456B (en) | 2012-09-27 | 2013-09-24 | Combined active and passive containment vessel heat removal apparatus |
ZA2015/02773A ZA201502773B (en) | 2012-09-27 | 2015-04-23 | Combined active and passive containment vessel heat removal apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201210370296.7 | 2012-09-27 | ||
CN2012103702967A CN102881342A (en) | 2012-09-27 | 2012-09-27 | Active and passive combined heat removal device for containment |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014048293A1 true WO2014048293A1 (en) | 2014-04-03 |
Family
ID=47482634
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2013/084049 WO2014048293A1 (en) | 2012-09-27 | 2013-09-24 | Combined active and passive containment vessel heat removal apparatus |
Country Status (5)
Country | Link |
---|---|
CN (1) | CN102881342A (en) |
GB (1) | GB2520456B (en) |
MY (1) | MY175898A (en) |
WO (1) | WO2014048293A1 (en) |
ZA (1) | ZA201502773B (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102881342A (en) * | 2012-09-27 | 2013-01-16 | 中国核电工程有限公司 | Active and passive combined heat removal device for containment |
CN103903657B (en) * | 2013-12-17 | 2016-04-20 | 中广核核电运营有限公司 | The non-active ultimate heat sink cooling system of nuclear power plant and method |
CN104751910A (en) * | 2013-12-31 | 2015-07-01 | 中国广核集团有限公司 | Emergency spray cooling system for containment in accident condition of nuclear power plant |
CN104078086A (en) * | 2014-06-04 | 2014-10-01 | 中国核电工程有限公司 | Active and passive combined containment sump water cooling system |
CN104134473B (en) * | 2014-06-30 | 2016-12-07 | 中国核电工程有限公司 | The containment cooling system that a kind of active combination is passive |
CN104134472B (en) * | 2014-06-30 | 2016-10-12 | 中国核电工程有限公司 | The manual dosing of containment spray system and locking control system for adding drugs and method |
CN105405479B (en) * | 2015-11-06 | 2017-11-17 | 中广核工程有限公司 | PWR nuclear power plant integrates passive safety system |
CN106251916B (en) * | 2016-08-31 | 2018-01-23 | 长江勘测规划设计研究有限责任公司 | A kind of underground nuclear power station cavern type double containment |
CN107978380A (en) * | 2016-10-25 | 2018-05-01 | 广东核电合营有限公司 | A kind of sodium ion control device of nuclear power plant containment shell spray system |
CN107393612A (en) * | 2017-07-31 | 2017-11-24 | 江苏华洋新思路能源装备股份有限公司 | The passive opposite opened exhaust cap of material-changing water tank built in nuclear power generating sets containment |
CN107731321A (en) * | 2017-09-30 | 2018-02-23 | 中国核电工程有限公司 | A kind of passive containment thermal conduction system protector |
CN107808701A (en) * | 2017-10-30 | 2018-03-16 | 上海核工程研究设计院有限公司 | Spray and shell wall heat-extraction system in a kind of passive containment |
JP2021050919A (en) * | 2019-09-20 | 2021-04-01 | 日立Geニュークリア・エナジー株式会社 | Ph adjustment system for reactor container vessel |
CN110752046B (en) * | 2019-10-12 | 2022-01-11 | 中国核电工程有限公司 | Safety device, nuclear power plant system and safe operation method of nuclear power plant |
CN113140335B (en) * | 2021-04-02 | 2022-03-22 | 中国核电工程有限公司 | Passive containment heat exporting system with internal heat exchanger protection device |
Citations (9)
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JPS5571993A (en) * | 1978-11-27 | 1980-05-30 | Tokyo Shibaura Electric Co | Spray device for reactor containment vessel |
US5426681A (en) * | 1994-01-04 | 1995-06-20 | General Electric Company | Boiling water reactor with combined active and passive safety systems |
JP2004198118A (en) * | 2002-12-16 | 2004-07-15 | Toshiba Corp | Installation and method for cooling reactor containment vessel |
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CN102169733A (en) * | 2011-02-14 | 2011-08-31 | 中国核电工程有限公司 | Passive and active combined special safety system for nuclear power plant |
CN102637464A (en) * | 2012-03-30 | 2012-08-15 | 中国核电工程有限公司 | Strengthened heat exchange method and device of double-layer concrete containment passive heat derived system |
CN102881342A (en) * | 2012-09-27 | 2013-01-16 | 中国核电工程有限公司 | Active and passive combined heat removal device for containment |
CN202887745U (en) * | 2012-09-27 | 2013-04-17 | 中国核电工程有限公司 | Active and passive combined safety shell heat extraction device |
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US5106571A (en) * | 1989-03-20 | 1992-04-21 | Wade Gentry E | Containment heat removal system |
CN202102729U (en) * | 2011-05-06 | 2012-01-04 | 中科华核电技术研究院有限公司 | Backup reactor core cooling and reactor cavity water filling system |
CN102522127B (en) * | 2011-12-23 | 2014-07-30 | 中国核电工程有限公司 | Passive containment thermal conduction system |
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2012
- 2012-09-27 CN CN2012103702967A patent/CN102881342A/en active Pending
-
2013
- 2013-09-24 MY MYPI2015700868A patent/MY175898A/en unknown
- 2013-09-24 WO PCT/CN2013/084049 patent/WO2014048293A1/en active Application Filing
- 2013-09-24 GB GB1504154.4A patent/GB2520456B/en active Active
-
2015
- 2015-04-23 ZA ZA2015/02773A patent/ZA201502773B/en unknown
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5571993A (en) * | 1978-11-27 | 1980-05-30 | Tokyo Shibaura Electric Co | Spray device for reactor containment vessel |
US5426681A (en) * | 1994-01-04 | 1995-06-20 | General Electric Company | Boiling water reactor with combined active and passive safety systems |
JP2004198118A (en) * | 2002-12-16 | 2004-07-15 | Toshiba Corp | Installation and method for cooling reactor containment vessel |
CN1674161A (en) * | 2004-03-26 | 2005-09-28 | 株式会社东芝 | Pressure suppression and decontamination apparatus and method for reactor container |
CN1917096A (en) * | 2005-08-18 | 2007-02-21 | 株式会社东芝 | Reactor containment vessel cooling equipment and nuclear energy electricity-generating apparatus |
CN102169733A (en) * | 2011-02-14 | 2011-08-31 | 中国核电工程有限公司 | Passive and active combined special safety system for nuclear power plant |
CN102637464A (en) * | 2012-03-30 | 2012-08-15 | 中国核电工程有限公司 | Strengthened heat exchange method and device of double-layer concrete containment passive heat derived system |
CN102881342A (en) * | 2012-09-27 | 2013-01-16 | 中国核电工程有限公司 | Active and passive combined heat removal device for containment |
CN202887745U (en) * | 2012-09-27 | 2013-04-17 | 中国核电工程有限公司 | Active and passive combined safety shell heat extraction device |
Also Published As
Publication number | Publication date |
---|---|
CN102881342A (en) | 2013-01-16 |
ZA201502773B (en) | 2016-04-28 |
MY175898A (en) | 2020-07-14 |
GB201504154D0 (en) | 2015-04-29 |
GB2520456A (en) | 2015-05-20 |
GB2520456B (en) | 2018-08-08 |
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