CN104134474A - Passive cooling system - Google Patents
Passive cooling system Download PDFInfo
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- CN104134474A CN104134474A CN201410370092.2A CN201410370092A CN104134474A CN 104134474 A CN104134474 A CN 104134474A CN 201410370092 A CN201410370092 A CN 201410370092A CN 104134474 A CN104134474 A CN 104134474A
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- 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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Abstract
A disclosed passive cooling system comprises a heat-exchange loop system and multi-stage spraying equipment; the heat-exchange loop system penetrates a safe shell in a sealed way, so that heat in the safe shell is discharged out of the safe shell; the multi-stage spraying equipment is arranged outside the safe shell and is communicated with a condensation pool at the outside of the safe shell; and the multi-stage spraying equipment comprises multiple spraying units at different height, and the multiple spraying units perform passive spraying on the heat-exchange loop system. The passive cooling system is capable of discharging residual heat in the safe shell in an accident without depending external power, and helps to improve the safety of a nuclear power station and especially improve the protective capability under design-exceeding conditions such as power off in a whole field, completely losing of a cooling chain, and the like. The multi-stage spraying equipment helps to realize passive spraying aiming at different flow of the heat-exchange loop system at different stages after an accident and intensify the heat conduction capability of the cooling system.
Description
Technical field
The present invention relates to nuclear power plant reactor security appliance field, relate in particular to a kind of non-active cooling system that is applicable to concrete containment.
Background technology
The use of nuclear power is the important breakthroughs of the mankind in energy utilization history, utilize nuclear fission reaction, nuclear power plant can produce the incomparable high-energy output of other all traditional fossil energies, and these high-energy outputs often only need to expend a small amount of nuclear fuel, the characteristic of this low input high production, make the utilization of mankind's pay attention to day by day to nuclear energy, and continue to increase the research and development in nuclear energy field, even to this day, nuclear energy has become the important energy source ingredient of many countries in the world.But; when nuclear power has high value, also may bring very large harm, in the process of use nuclear power; cause if protect improper major accidents such as occurring nuclear leakage, will bring extremely serious nuclear pollution disaster to the environment of nuclear power plant's periphery and even the whole mankind.
In pressurized-water reactor nuclear power plant, a loop refers to that the heat energy that chilled water is emitted nuclear fuel takes reactor pressure vessel out of, and enters steam generator, by thousands of heat-transfer pipes, heat is passed to the secondary circuit water outside pipe, makes water boiling produce steam; Cooling water flow, after steam generator, then is sent into reactor pressure vessel by main pump, so back and forth circulation.In the time of the security incident of reactor-loop generation large break dehydration, chilled water in reactor pressure vessel tails off, therefore, the temperature of reactor pressure vessel can rise rapidly, if cooling and the heat of reactor pressure vessel is derived not in time, may make the temperature of containment and pressure raise, thereby cause more serious security incident, therefore, need to further safety guarantee be set to containment.
Existing containment extensively adopts xoncrete structure, and it is to prevent that radioactive product is discharged into last one barrier in atmospheric environment.Because the heat conductivility of concrete itself is very poor, and wall thickness is thicker, therefore, after accident, can not rely on concrete containment itself that the heat in shell is expelled in atmospheric environment quickly and effectively.At present, after accident, in containment, the discharge of waste heat is all to realize by active cooling infrastructure, and the operation of these cooling infrastructures all depends on external impetus, will cause serious consequence once there is the situations such as whole audience power-off.
Therefore, be necessary to provide a kind of external impetus that do not rely on just can realize the non-active cooling system that under accident, in containment, waste heat is derived fast, to solve above-mentioned the deficiencies in the prior art.
Summary of the invention
The object of the present invention is to provide a kind of external impetus that do not rely on just can realize the non-active cooling system that under accident, in containment, waste heat is derived fast.
For achieving the above object, technical scheme of the present invention is: a kind of non-active cooling system is provided, it is for deriving the heat in containment, described non-active cooling system comprises heat-exchanging loop system and multi-stage spray equipment, described heat-exchanging loop system sealing ground runs through described containment so that the heat in described containment is derived outside described containment, described multi-stage spray equipment is located at described containment outward and is communicated with the condensation pond outside described containment, described multi-stage spray equipment comprises multiple spray unit that are positioned at differing heights, multiple described sprays unit carries out non-active spray to described heat-exchanging loop system.
Preferably, described heat-exchanging loop system comprises external heat exchanger, and described external heat exchanger is located at outside described containment, and the top of described external heat exchanger is all located in multiple described sprays unit; By multiple sprays unit of differing heights is set above external heat exchanger, make the flow of multi-stage spray equipment relevant with the decay heat in the containment that needs after accident to derive,, make different phase after accident, external heat exchanger is subject to different flow and has all the time the spray of lower temperature condensate water, realize the non-active spray flow control to external heat exchanger, reduce the outlet temperature of external heat exchanger, the capacity of heat transmission of strengthening cooling system.
Preferably, described heat-exchanging loop system also comprises interior heat interchanger, increase in pipeline, decline pipeline and heat eliminating medium, described interior heat interchanger is placed in described containment, described external heat exchanger is higher than described interior heat interchanger, described increase in pipeline runs through hermetically described containment and is communicated with the outlet of described interior heat interchanger and the entrance of described external heat exchanger, described decline pipeline runs through hermetically described containment and is communicated with the outlet of described external heat exchanger and the entrance of described interior heat interchanger, described heat eliminating medium is at described interior heat interchanger, described increase in pipeline, described external heat exchanger, in the circulation passage that described decline pipeline forms, flow.
Preferably, described decline pipeline is provided with the first valve, and described the first valve is positioned at described containment.
Preferably, described interior heat interchanger is placed in the reactor pit in described containment.
Preferably, described in each, spray unit and include spray piping, shower nozzle and the second valve, one end of described spray piping is penetratingly connected in the sidewall in described condensation pond, the other end of described spray piping is provided with described shower nozzle, and described shower nozzle is positioned at the top of described external heat exchanger, described the second valve is located on described spray piping; The structure setting of spray unit, makes under the spray flow of outlet temperature necessity that keeps external heat exchanger, can reduce the spray flow loss that excessive spray causes as far as possible.
Preferably, described non-active cooling system also comprises air cooling passage, the two ends of described air cooling passage are communicated with airspace, and described external heat exchanger is placed in described air cooling passage, and multiple described sprays unit all stretches in described air cooling passage and is positioned at the top of described external heat exchanger; External heat exchanger is located to the bottom of air cooling passage, by the air of heating air cooling passage bottom, be conducive to form and stablize lasting atmosphere Natural Circulation, the further capacity of heat transmission of strengthening cooling system, take away part heat by this air cooling passage and save spray flow, further to extend the time of utilizing of condensate water.
Preferably, described non-active cooling system also comprises the first dividing plate and the second partition that arrange separately, forms described air cooling passage between described the first dividing plate and described second partition.Particularly, the first dividing plate is connected in the lower end of a sidewall in condensation pond, second partition be located at a side in condensation pond and with the first dividing plate separately, external heat exchanger is placed in the bottom of air cooling passage, spray unit stretches into the top of air cooling passage.
Preferably, described non-active cooling system also comprises blowdown line, and described blowdown line is located on the loop of the pressure vessel in described containment, and described blowdown line is provided with blowdown valve, and the output terminal of described blowdown line is positioned at described containment; In the time there is large break dehydration in a loop of pressure vessel, because a circuit cools water tails off, cooled reactor pressure vessel rapidly, the temperature of reactor pressure vessel inside and pressure can raise fast, therefore, utilize described blowdown line to carry out quick pressure releasing to a loop, can carry out step-down to an inside, loop on the one hand, after a loop step-down, can make on the other hand the chilled water in reactor pit more easily and rapidly inject from a loop cut.In addition, the output terminal of described blowdown line is positioned at described containment and can prevents that nuclear pollution material is discharged into outside containment, causes nuclear leakage.
Preferably, described non-active cooling system also comprises and being located in described containment and higher than the high-order refuelling pool of the reactor pit in described containment, described high-order refuelling pool is communicated with described reactor pit; While having an accident, the chilled water in high-order refuelling pool injects reactor pit automatically, and covered pressure vessel outer wall continuously and effectively exports to the decay heat of reactor core in reactor pit.
Preferably, the entrance of described interior heat interchanger is positioned at lower end, and the outlet of described interior heat interchanger is positioned at upper end; The entrance of described external heat exchanger is positioned at upper end, and the outlet of described external heat exchanger is positioned at lower end.
Compared with prior art, due to non-active cooling system of the present invention, comprise heat-exchanging loop system and multi-stage spray equipment, described heat-exchanging loop system sealing ground runs through described containment so that the heat in described containment is derived outside described containment, described multi-stage spray equipment is located at described containment outward and is communicated with the condensation pond outside described containment, described multi-stage spray equipment comprises multiple spray unit that are positioned at differing heights, and multiple described sprays unit carries out non-active spray to described heat-exchanging loop system.In the time that reactor-loop has an accident, heat in containment conducts to heat-exchanging loop system and heats the intrasystem low boiling heat eliminating medium of heat-exchanging loop and make its evaporation, thereby heat eliminating medium circulates the heat in containment is exported to atmospheric environment in heat-exchanging loop system, do not rely on the power such as external ac power source and just can realize the export function of the interior waste heat of containment under accident, the security that improves nuclear power station, especially improves in whole audience power-off and completely loses the protective capacities under the super design conditions such as cooling chain; And the non-active spray of the different flow of different phase heat exchanging circuit system after accident, the capacity of heat transmission of strengthening cooling system are realized in multiple sprays unit of being located at differing heights of multi-stage spray equipment; Whole process is all with certain air cooling power, with the object that reaches consolidation system cooling power and extend the systemic effect cycle simultaneously.
Brief description of the drawings
Fig. 1 is the structural representation of the non-active cooling system of the present invention.
Fig. 2 is the enlarged diagram of multi-stage spray equipment in Fig. 1.
Fig. 3 be in Fig. 1 chilled water and heat eliminating medium flow to schematic diagram.
Embodiment
With reference now to accompanying drawing, describe embodiments of the invention, in accompanying drawing, similarly element numbers represents similar element.
As shown in Figure 1, non-active cooling system 100 provided by the present invention, for deriving the heat in concrete containment 101.Wherein, in described containment 101, be provided with reactor pit 102 and be placed in the pressure vessel 103 in described reactor pit 102; In described containment 101, be also provided with high-order refuelling pool 104, the position of described high-order refuelling pool 104 is higher than the position of reactor pit 102, and high-order refuelling pool 104, by a pipeline connection reactor pit 102, is equipped with chilled water in high-order refuelling pool 104; High-order refuelling pool 104 is in order to ensure in the time there is emergency episode higher than reactor pit 102, chilled water in high-order refuelling pool 104 can inject reactor pit 102 automatically, realize flooding fast reactor pressure vessel 103, thereby utilize the outer wall of covered pressure vessel 103 that the decay heat of reactor core is continuously and effectively exported in chilled water, remove use pumping for water pump from, realize non-active water filling, situation that cannot water filling because of power-off when Accident prevention occurs, improves security; The outer condensation pond 110 that is also provided with of described containment 101.
Described non-active cooling system 100 comprises heat-exchanging loop system and multi-stage spray equipment 111, described heat-exchanging loop system sealing ground runs through described containment 101 so that the heat in containment 101 is derived outside containment 101, described multi-stage spray equipment 111 is located at outside containment 101 and is communicated with described condensation pond 110, described multi-stage spray equipment 111 comprises multiple spray unit 112 of being located at differing heights, and multiple described sprays unit 112 carries out non-active spray to described heat-exchanging loop system.
Continue to consult shown in Fig. 1, described heat-exchanging loop system comprises interior heat interchanger 105, increase in pipeline 106, external heat exchanger 107, decline pipeline 108 and heat eliminating medium.Described interior heat interchanger 105 is placed in containment 101, and in the present embodiment, interior heat interchanger 105 is placed in reactor pit 102, and interior heat interchanger 105 has entrance and outlet, and the entrance of interior heat interchanger 105 is positioned at lower end, and the outlet of interior heat interchanger 105 is positioned at upper end; External heat exchanger 107 is located at outside containment 101, and its position is higher than the position of described interior heat interchanger 105, and the entrance of described external heat exchanger 107 is positioned at upper end, and the outlet of external heat exchanger 107 is positioned at lower end.Described increase in pipeline 106 runs through hermetically containment 101 and is communicated with the interior outlet of heat interchanger 105 and the entrance of external heat exchanger 107, decline pipeline 108 runs through hermetically containment 101 and is communicated with the outlet of described external heat exchanger 107 and the entrance of described interior heat interchanger 105, and on decline pipeline 108, be also provided with the first valve 108a, in the present embodiment, the first valve 108a is positioned at described containment 101.In the circulation passage that described heat eliminating medium forms at interior heat interchanger 105, increase in pipeline 106, external heat exchanger 107, decline pipeline 108, flow.
Certainly, interior heat interchanger 105 is not limited to being placed in reactor pit 102 in the present embodiment, and it can also be placed in other positions in containment 101.
In addition, the position in described condensation pond 110 is higher than the position of external heat exchanger 107; And described non-active cooling system 100 also comprises air cooling path 10 9, air cooling path 10 9 is located between condensation pond 110 and containment 101, and external heat exchanger 107 is placed in air cooling path 10 9, multiple sprays unit 112 of multi-stage spray equipment 111 is all located at the top of external heat exchanger 107 and is communicated with described condensation pond 110.
In the time that accident occurs, utilize the outer wall of covered pressure vessel 103 that the decay heat of reactor core is continuously and effectively exported in the chilled water in reactor pit 102, water temperature in reactor pit 102 continues to raise, heated water is by the low boiling heat eliminating medium heating in interior heat interchanger 105, heat eliminating medium is subject to thermal evaporation, outlet, increase in pipeline 106 through interior heat interchanger 105 enter the external heat exchanger 107 outside containment 101, heat release condensation in external heat exchanger 107, exports to atmospheric environment ultimate heat sink by the heat in containment 101; Heat eliminating medium is in external heat exchanger 107 after heat release condensation, under Action of Gravity Field, get back in the interior heat interchanger 105 of containment 101 inside through outlet, the decline pipeline 108 of external heat exchanger 107, form closed circuit, do not rely on external power supply and just can realize under accident the waste heat derivation in containment 101; Non-actively spraying cooling external heat exchanger 107 is realized in multiple sprays unit 112 of multi-stage spray equipment 111, realizes the strengthening of system cools ability in cycle accident long period.
Again consult shown in Fig. 1, described non-active cooling system 100 also comprises blowdown line 113, blowdown line 113 is located on the loop of pressure vessel 103, and described blowdown line 113 is provided with blowdown valve 113a, and the output terminal of described blowdown line 113 is positioned at described containment 101.Like this, in the time there is large break dehydration in a loop, because a circuit cools water tails off, cooling pressure container 103 rapidly, the temperature of pressure vessel 103 inside and pressure can raise fast, therefore, utilize described blowdown line 113 to carry out quick pressure releasing to a loop, can carry out step-down to an inside, loop on the one hand, after a loop step-down, can make on the other hand the chilled water in reactor pit 102 more easily and rapidly inject from a loop cut.In addition, the output terminal of described blowdown line 113 is positioned at described containment 101 and can prevents that nuclear pollution material is discharged into outside containment 101, avoids causing nuclear leakage.
Shown in Fig. 1, Fig. 2, the two ends of air cooling path 10 9 are communicated with airspace, and external heat exchanger 107 is placed in the bottom of air cooling path 10 9, and one end of described increase in pipeline 106 is stretched in air cooling path 10 9 and is communicated with the entrance of external heat exchanger 107.Multiple sprays unit 112 of multi-stage spray equipment 111 is all connected in the sidewall in condensation pond 110 and is communicated with condensation pond 110, and multiple sprays unit 112 all stretches into the top of described air cooling path 10 9 and is positioned at the top of described external heat exchanger 107.External heat exchanger 107 is located to the bottom of air cooling path 10 9, can be by the air of heating air cooling path 10 9 bottoms, be conducive to form and stablize lasting atmosphere Natural Circulation, the further capacity of heat transmission of strengthening cooling system 100, take away part system thermal by this air cooling path 10 9 and save spray flow, further to extend the time of utilizing of condensate water.
Particularly, described air cooling path 10 9 is formed by the first dividing plate 109a, the second partition 109b that arrange separately, the first dividing plate 109a is connected in the lower end of the sidewall that is provided with multi-stage spray equipment 111 in condensation pond 110, the first dividing plate 109a is along the sidewall that is provided with multi-stage spray equipment 111 in condensation pond 110 to downward-extension, second partition 109b be located at a side in condensation pond 110 and with the first dividing plate 109a separately, the gap between described the first dividing plate 109a and described second partition 109b forms described air cooling path 10 9.
Continue in conjunction with shown in Fig. 1, Fig. 2, multiple described sprays unit 112 is vertically located at intervals the sidewall in described condensation pond 110 and is all communicated with condensation pond 110; By multiple sprays unit 112 of different liquid levels is set on the sidewall in condensation pond 110, make the different phase after accident, external heat exchanger 107 is subject to different flow and has all the time the spray of lower temperature condensate water, realize the non-active spray flow control to external heat exchanger 107, reduce the temperature in the exit of external heat exchanger 107, the capacity of heat transmission of strengthening cooling system 100.
In the present embodiment, multi-stage spray equipment 111 preferably includes spray unit 112,112, three of three spray unit and is located at intervals on the sidewall in condensation pond 110 successively, and each spray unit 112 all stretches in air cooling path 10 9.Particularly, each spray unit 112 includes spray piping 1121, the second valve 1122 and shower nozzle 1123, one end of spray piping 1121 is penetratingly connected in the sidewall in described condensation pond 110, the other end of spray piping 1121 is connected with shower nozzle 1123, and shower nozzle 1123 is positioned at the top of described external heat exchanger 107, the second valve 1122 is located on spray piping 1121.The flow of multi-stage spray equipment 111 is relevant with the decay heat in the containment 101 that needs after accident to derive,, the a large amount of decay heat of accident initial stage containment 101 interior gathering, now open the second valve 1122 of all sprays unit 112, all sprays unit 112 all carries out non-active spray to external heat exchanger 107, and spray flow is relatively large; The relative initial stage of decay heat in post incident containment 101 is lower, and along with the reduction of condensation pond 110 interior water levels, the spray flux of multi-stage spray equipment 111 gradually reduces simultaneously, and spray flow is relatively little; Make the different phase after accident, external heat exchanger 107 is subject to different flow and has all the time the spray of lower temperature condensate water; Simultaneously, the setting of the second valve 1122, can be according to the different phase of accident, the one or more sprays of choice for use unit 112, make under the spray flow of outlet temperature necessity that keeps external heat exchanger 107, can reduce the spray flow loss that excessive spray causes as far as possible.
Shown in Fig. 1-Fig. 3, the principle of work of non-active cooling system 100 of the present invention is described.
When a loop large break dehydration, when reactor pressure vessel 103 temperature anomaly, blowdown valve 113a opens, and an inside, loop is to the interior pressure release of containment 101.Simultaneously, chilled water in high-order refuelling pool 104 injects reactor pit 102 automatically due to pressure differential, pressure vessel 103 is flooded fast, utilize covered pressure vessel 103 outer walls that the decay heat of reactor core is continuously and effectively exported in the chilled water in reactor pit 102, the water temperature in reactor pit 102 continues to raise.
The interior heated water of reactor pit 102 is by the low boiling heat eliminating medium heating in interior heat interchanger 105, low boiling heat eliminating medium is subject to thermal evaporation, under the effect of cool cycles passage both sides density difference, heat eliminating medium enters the external heat exchanger 107 outside containment 101 through outlet, the increase in pipeline 106 of interior heat interchanger 105, heat release condensation in external heat exchanger 107, thus the heat in containment 101 is exported to atmospheric environment ultimate heat sink; Condensed heat eliminating medium is got back in the interior heat interchanger 105 of containment 101 inside through outlet, the decline pipeline 108 of external heat exchanger 107 under Action of Gravity Field, forms closed circuit.Therefore, do not rely on AC power, can realize the waste heat of concrete type containment 101 under accident derives, improve the security of nuclear power plant, especially have whole audience power-off and completely lose the protective capacities under the super design conditions such as cooling chain, realizing under powering-off state the long-term safety of containment 101 and reactor controlled.
And differing heights is located in the sprays at different levels unit 112 of multi-stage spray equipment 111, therefore, different phase after accident, external heat exchanger 107 is subject to different flow and the spray of lower temperature all the time, realize the non-active spray flow control of external heat exchanger 107, reduce external heat exchanger 107 outlet temperatures, the capacity of heat transmission of strengthening cooling system 100; Meanwhile, keeping, under the required necessary spray flow of external heat exchanger 107 outlet temperatures, can reducing the flow loss that excessive spray causes as far as possible.
In addition, external heat exchanger 107 integral arrangement are in the bottom of air cooling path 10 9, by heating bottom air, be conducive to form and stablize lasting atmosphere Natural Circulation, the further capacity of heat transmission of strengthening cooling system 100, take away part heat by this air cooling and save spray flow, further to extend the time of utilizing of condensate water, the object that reaches consolidation system cooling power and extend the systemic effect cycle.
Due to non-active cooling system 100 of the present invention, heat-exchanging loop system and multi-stage spray equipment 111, described heat-exchanging loop system sealing ground runs through described containment 101 so that the heat in containment 101 is derived outside containment 101, described multi-stage spray equipment 111 is located at outside containment 101 and is communicated with the condensation pond 110 outside containment 101, described multi-stage spray equipment 111 comprises multiple spray unit 112 that are positioned at differing heights, and multiple described sprays unit 112 carries out non-active spray to described heat-exchanging loop system.In the time that reactor-loop has an accident, heat in containment conducts to heat-exchanging loop system and heats the intrasystem low boiling heat eliminating medium of heat-exchanging loop and make its evaporation, thereby heat eliminating medium circulates the heat in containment is exported to atmospheric environment in heat-exchanging loop system, therefore do not rely on the power such as external ac power source and just can realize the export function of containment 101 interior waste heats under accident, the security that improves nuclear power station, especially improves in whole audience power-off and completely loses the protective capacities under the super design conditions such as cooling chain; And multiple sprays unit 112 of the different liquid levels of being located at condensation pond of multi-stage spray equipment 111, realize the non-active spray of the different flow of the external heat exchanger 107 in different phase heat exchanging circuit system after accident, the capacity of heat transmission of strengthening cooling system 100; Whole process is all with certain air cooling power, with the object that reaches consolidation system cooling power and extend the systemic effect cycle simultaneously.
Above disclosed is only the preferred embodiments of the present invention, certainly can not limit with this interest field of the present invention, and the equivalent variations of therefore doing according to the present patent application the scope of the claims, still belongs to the scope that the present invention is contained.
Claims (11)
1. a non-active cooling system, for the heat in containment is derived, it is characterized in that: described non-active cooling system comprises heat-exchanging loop system and multi-stage spray equipment, described heat-exchanging loop system sealing ground runs through described containment so that the heat in described containment is derived outside described containment, described multi-stage spray equipment is located at described containment outward and is communicated with the condensation pond outside containment, described multi-stage spray equipment comprises multiple spray unit that are positioned at differing heights, and multiple described sprays unit carries out non-active spray to described heat-exchanging loop system.
2. non-active cooling system as claimed in claim 1, is characterized in that: described heat-exchanging loop system comprises external heat exchanger, described external heat exchanger is located at outside described containment, and the top of described external heat exchanger is all located in multiple described sprays unit.
3. non-active cooling system as claimed in claim 2, it is characterized in that: described heat-exchanging loop system also comprises interior heat interchanger, increase in pipeline, decline pipeline and heat eliminating medium, described interior heat interchanger is placed in described containment, described external heat exchanger is higher than described interior heat interchanger, described increase in pipeline runs through hermetically described containment and is communicated with the outlet of described interior heat interchanger and the entrance of described external heat exchanger, described decline pipeline runs through hermetically described containment and is communicated with the outlet of described external heat exchanger and the entrance of described interior heat interchanger, described heat eliminating medium is at described interior heat interchanger, described increase in pipeline, described external heat exchanger, in the circulation passage that described decline pipeline forms, flow.
4. non-active cooling system as claimed in claim 3, is characterized in that: described decline pipeline is provided with the first valve, described the first valve is positioned at described containment.
5. non-active cooling system as claimed in claim 3, is characterized in that: described interior heat interchanger is placed in the reactor pit in containment.
6. non-active cooling system as claimed in claim 2, it is characterized in that: described in each, spray unit and include spray piping, shower nozzle and the second valve, one end of described spray piping is penetratingly connected in the sidewall in described condensation pond, the other end of described spray piping is provided with described shower nozzle, and described shower nozzle is positioned at the top of described external heat exchanger, described the second valve is located on described spray piping.
7. non-active cooling system as claimed in claim 2, it is characterized in that: also comprise air cooling passage, the two ends of described air cooling passage are communicated with airspace, described external heat exchanger is placed in described air cooling passage, and multiple described sprays unit all stretches in described air cooling passage and is positioned at the top of described external heat exchanger.
8. non-active cooling system as claimed in claim 7, is characterized in that: also comprise the first dividing plate and the second partition that arrange separately, form described air cooling passage between described the first dividing plate and described second partition.
9. non-active cooling system as claimed in claim 1, it is characterized in that: also comprise blowdown line, described blowdown line is located on the loop of the pressure vessel in containment, and described blowdown line is provided with blowdown valve, and the output terminal of described blowdown line is positioned at described containment.
10. non-active cooling system as claimed in claim 1, is characterized in that: also comprise and being located in described containment and higher than the high-order refuelling pool of the reactor pit in containment, described high-order refuelling pool is communicated with described reactor pit.
11. non-active cooling systems as claimed in claim 3, is characterized in that: the entrance of described interior heat interchanger is positioned at lower end, the outlet of described interior heat interchanger is positioned at upper end, and the entrance of described external heat exchanger is positioned at upper end, and the outlet of described external heat exchanger is positioned at lower end.
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Cited By (5)
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| WO2016078421A1 (en) * | 2014-11-19 | 2016-05-26 | 中科华核电技术研究院有限公司 | Passive safe cooling system |
| 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 |
| CN108847293A (en) * | 2018-07-23 | 2018-11-20 | 上海核工程研究设计院有限公司 | One kind can spray separate heat pipe condensation segment spentnuclear fuel pond cooling system |
| CN110570957A (en) * | 2019-09-06 | 2019-12-13 | 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 |
| CN114023470A (en) * | 2021-09-17 | 2022-02-08 | 中国船舶重工集团公司第七一九研究所 | Passive heat exchange system and reactor system |
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