CN215450911U - Enhanced passive containment air cooling system of small reactor - Google Patents
Enhanced passive containment air cooling system of small reactor Download PDFInfo
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- CN215450911U CN215450911U CN202120713225.7U CN202120713225U CN215450911U CN 215450911 U CN215450911 U CN 215450911U CN 202120713225 U CN202120713225 U CN 202120713225U CN 215450911 U CN215450911 U CN 215450911U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model relates to the technical field of cooling of small reactors, in particular to an enhanced passive containment air cooling system of a small reactor, which comprises a shielding workshop, a containment arranged in the shielding workshop and an air injection system, wherein the air injection system comprises a compressed air storage tank and an injector; the side wall of the compressed air storage tank is provided with a compressed air inlet and a compressed air outlet, the compressed air outlet is connected with one end of an air supply main pipe, the other end of the air supply main pipe is provided with a plurality of branches, the outlet ends of the branches penetrate through the shielding workshop and then are uniformly distributed on the periphery outside the containment, and the outlet ends of the branches are connected with an ejector; the positions, close to the upper and lower parts, of the side wall of at least one symmetrical side of the shielding workshop are respectively provided with an air inlet corresponding to the position of the suction inlet of the ejector, and the top of the shielding workshop is provided with an air outlet. The utility model has the advantages that the heat in the containment vessel is discharged after an accident in a mode of combining forced convection and natural convection, the passive characteristic is realized, and the safety and the economy of a unit are improved.
Description
Technical Field
The utility model relates to the technical field of small reactor cooling, in particular to an enhanced passive containment air cooling system of a small reactor.
Background
The development of small reactors pays more attention to safety, advancement and economy, new processes, new materials and new technologies are continuously introduced, and the engineering feasibility of the small reactors is fully demonstrated, so that the reactors can run more safely, economically and reliably. The small reactor adopts a passive safety design concept, so that the inherent safety of the reactor can be ensured.
The AP1000 third-generation passive pressurized water reactor nuclear power plant adopts a passive containment coolant system as a special safety facility for heat derivation after an accident, the design is that a water tank is arranged at the top of a containment, containment cooling is realized by adopting a passive water injection mode, the pressure difference inside and outside the containment is reduced, and the driving force of fission products leaking to the outside of the containment is reduced, so that the release of the radioactive fission products in the containment to the environment is limited, and the integrity of the containment is ensured.
For a small reactor, due to low reactor power, the decay heat of a reactor core after an accident is small, the requirement on the heat to be led out and the duration is far lower than that of a large reactor, if an improved containment cooling system can be designed, the design that the top of a containment is provided with a high-level vertical structure is replaced, the difficulty of seismic design of structures is reduced, the design, construction and installation difficulty is simplified on the premise of ensuring heat leading out, and the safety and the economical efficiency can be improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art, the air injection system is additionally arranged in the space flow channel between the shielding workshop and the containment vessel, the heat in the containment vessel is discharged after an accident in a mode of combining forced convection and natural convection, the passive characteristic is realized, and the safety and the economical efficiency of a unit are improved.
In order to achieve the purpose, the enhanced passive containment air cooling system of the small reactor is designed, which comprises a shielding factory building and a containment arranged in the shielding factory building, and is characterized in that,
the air injection system comprises a compressed air storage tank and an injector;
the side wall of the compressed air storage tank is provided with a compressed air inlet, a compressed air outlet on the side wall of the compressed air storage tank is connected with one end of an air supply main pipe, the other end of the air supply main pipe is provided with a plurality of branches, the outlet ends of the branches respectively penetrate through the shielding workshop and then are uniformly distributed on the periphery outside the containment vessel, and the outlet ends of the branches of the air supply main pipe are respectively connected with an ejector; and the positions close to the lower part on the side wall of at least one symmetrical side of the shielding workshop are respectively provided with an air inlet, the position of the air inlet corresponds to the position of the suction inlet of the ejector, and the top of the shielding workshop is provided with an air outlet.
Further, a driving gas isolation valve and a pressure reducing valve are sequentially arranged on the gas supply main pipe along the conveying direction; check valves are respectively arranged on the plurality of branches.
Furthermore, a pressure relief pipeline is arranged at the top of the compressed air storage tank, and a safety valve is arranged on the pressure relief pipeline.
Further, the nozzle of the ejector faces upwards.
The utility model has the advantages that the improvement is simple, the structure is reasonable, the air injection system is additionally arranged in the space flow channel between the shielding workshop and the containment vessel, when the pressure or the temperature in the containment vessel is increased at the initial stage of an accident and heat needs to be discharged by the containment vessel, the air injection system is started, the higher air cooling capacity is established by forced air convection heat exchange, the heat in the containment vessel is discharged, and the pressure increase in the containment vessel is inhibited; with the reduction of the heat exhaust requirement in the containment, the natural air convection cooling stage is shifted to gradually reduce the pressure of the containment and exhaust heat; the design realizes the discharge of heat in the containment after an accident by combining the forced convection and the natural convection, has the passive characteristic, and improves the safety and the economy of a unit.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The utility model will now be further described with reference to the accompanying drawings.
Example 1
Referring to fig. 1, the enhanced passive containment air cooling system of a small reactor of the utility model comprises a shielding factory building 14 and a containment 15 arranged in the shielding factory building, and is characterized in that,
the air injection system comprises a compressed air storage tank 2 and an injector 10;
a compressed air inlet 1 is arranged on the side wall of the compressed air storage tank 2, a compressed air outlet on the side wall of the compressed air storage tank 2 is connected with one end of an air supply main pipe 5, the other end of the air supply main pipe 5 is provided with a plurality of branches, outlet ends of the branches respectively penetrate through a shielding workshop 14 and then are uniformly distributed on the periphery outside a containment 15, outlet ends of the branches of the air supply main pipe 5 are respectively connected with an ejector 10, and a nozzle of the ejector 10 is upward; and the positions near the upper and lower parts of the side wall of at least one symmetrical side of the shielding workshop 14 are respectively provided with an air inlet 13, the position of the air inlet 13 corresponds to the position of the suction inlet 12 of the ejector 10, and the top of the shielding workshop 14 is provided with an air outlet 17.
Wherein, a driving gas isolation valve 6 and a pressure reducing valve 7 are sequentially arranged on the gas supply main pipe 5 along the conveying direction; check valves 9 are respectively arranged on a plurality of the branches. Further, a pressure relief pipeline 3 is arranged at the top of the compressed air storage tank 2, and a safety valve 4 is arranged on the pressure relief pipeline 3.
During normal operation of the unit, the drive gas isolation valve 6 is closed and the compressed air entering through the compressed air inlet 1 maintains the pressure in the compressed air storage tank 2. If the pressure of the compressed air storage tank 2 is overpressure, overpressure protection is provided by means of the pressure relief pipe 3 and the safety valve 4.
In the initial stage of an accident, when the pressure and the temperature of the containment 15 rise, the air injection system is started, the driving gas isolation valve 6 is opened, the compressed air in the compressed air storage tank 2 enters the injector 10 through the air supply main pipe 5, the driving gas isolation valve 6, the pressure reducing valve 7, the driving gas pipeline 8 and the check valve 9, the cooling air in the injector 10 is sucked into the suction port 12 of the injector 10 through the air inlet 13, the mixed cooling air sprayed out of the injector 10 enters the air cooling flow channel 16 formed by the interval between the shielding workshop 14 and the containment 15, the surface of the containment 15 is cooled through forced convection, and the heat is taken out and exhausted through the air outlet 17 at the top of the shielding workshop 14.
Along with the reduction of the heat exhaust requirement in the containment 15, the compressed air in the compressed air storage tank 2 is gradually used up, and the natural convection cooling stage of the air is shifted to, the cooling air enters the air cooling flow channel 16 between the shielding workshop 14 and the containment 15 through the air inlet 13, continuously flows upwards, cools the surface of the containment 15, and is exhausted into the atmosphere through the outlet 17, so that the heat in the containment 15 is exhausted into the atmosphere.
Claims (4)
1. An enhanced passive containment air cooling system of a small reactor comprises a shielding factory building (14) and a containment (15) arranged in the shielding factory building, and is characterized in that,
the air injection system comprises a compressed air storage tank (2) and an injector (10);
a compressed air inlet (1) is formed in the side wall of the compressed air storage tank (2), a compressed air outlet in the side wall of the compressed air storage tank (2) is connected with one end of a main air supply pipe (5), the other end of the main air supply pipe (5) is provided with a plurality of branches, outlet ends of the branches penetrate through a shielding workshop (14) respectively and then are uniformly distributed on the periphery outside a containment (15), and outlet ends of the branches of the main air supply pipe (5) are connected with an ejector (10) respectively; and the positions close to the lower part on the side wall of at least one symmetrical side of the shielding workshop (14) are respectively provided with an air inlet (13), the position of the air inlet (13) corresponds to the position of the suction inlet (12) of the ejector (10), and the top of the shielding workshop (14) is provided with an air outlet (17).
2. The enhanced passive air cooling containment system for a small scale reactor of claim 1,
a driving gas isolation valve (6) and a pressure reducing valve (7) are sequentially arranged on the gas supply main pipe (5) along the conveying direction;
check valves (9) are respectively arranged on the plurality of branches.
3. An enhanced passive air cooling containment system for a small reactor according to claim 1, characterized in that the top of the compressed air storage tank (2) is provided with a pressure relief pipeline (3), and the pressure relief pipeline (3) is provided with a safety valve (4).
4. An enhanced passive air cooling containment system for a mini-reactor as in claim 1 wherein the jet of the injector (10) is directed upwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120713225.7U CN215450911U (en) | 2021-04-08 | 2021-04-08 | Enhanced passive containment air cooling system of small reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120713225.7U CN215450911U (en) | 2021-04-08 | 2021-04-08 | Enhanced passive containment air cooling system of small reactor |
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| CN215450911U true CN215450911U (en) | 2022-01-07 |
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| CN202120713225.7U Active CN215450911U (en) | 2021-04-08 | 2021-04-08 | Enhanced passive containment air cooling system of small reactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113113164A (en) * | 2021-04-08 | 2021-07-13 | 上海核工程研究设计院有限公司 | Enhanced passive containment air cooling system of small reactor |
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2021
- 2021-04-08 CN CN202120713225.7U patent/CN215450911U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113113164A (en) * | 2021-04-08 | 2021-07-13 | 上海核工程研究设计院有限公司 | Enhanced passive containment air cooling system of small reactor |
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Address after: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |