CN204458569U - A kind of ejector system vacuumized for reactor coolant loop - Google Patents
A kind of ejector system vacuumized for reactor coolant loop Download PDFInfo
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- CN204458569U CN204458569U CN201520026372.1U CN201520026372U CN204458569U CN 204458569 U CN204458569 U CN 204458569U CN 201520026372 U CN201520026372 U CN 201520026372U CN 204458569 U CN204458569 U CN 204458569U
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- sparger
- suction port
- pipeline
- reactor coolant
- coolant loop
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Abstract
The utility model provides a kind of ejector system vacuumized for reactor coolant loop.It comprises the sparger one and sparger two that symmetry is arranged in parallel; Propellant suction port pipeline is divided into two-way through threeway, connects the entrance of sparger one and the entrance of sparger two respectively; Suction port pipeline is divided into symmetrical two-way through threeway, connects the suction chamber of sparger one and the suction chamber of sparger two respectively; Exhaust line is divided into two-way through threeway, connects the outlet of sparger one and the outlet of sparger two respectively; Described suction port pipeline is arranged a vacuum breaking pipeline, vacuum breaking pipeline is provided with stop valve two.The utility model ejector system substantially increases rate of air sucked in required, shortens pumpdown time, in 120 minutes, the volume of about 250 cubic metres can be evacuated to 0.01MPa from 0.1MPa, meet the requirement that CAP1000 reactor coolant loop vacuumizes.
Description
Technical field
The present invention relates to nuclear power plant reactor coolant system, be specifically related to a kind of ejector system vacuumized for large-scale million kilowatt generation Ⅲ nuclear power unit (CAP1000) reactor coolant loop.
Background technique
In conventional pressurized water heap nuclear power plant start-up course, main pump point flowing mode is adopted dynamically to catch up with gas to reactor coolant loop.Which requires higher to main pump, and catches up with gas effect undesirable.
Chinese large-sized million kilowatt generation Ⅲ nuclear power unit, be called for short CAP1000, reactor coolant loop starts employing vacuum water-filling mode, the air being gathered in steam generator heat-transfer pipe top utilizing which can discharge traditional approach not easily to drive out of, reduces the possibility of reactor coolant pump cavitation erosion.Clear and definite requirement is proposed to pumped vacuum systems, namely the pressure of reactor coolant loop can be evacuated to 0.01MPa (a) from 0.1MPa (a) in 2 hours.At present, pumped vacuum systems has a kind of scheme to be adopt displacement pump to vacuumize, and displacement pump is a canned pump, but needs to seal water.
Summary of the invention
The object of the present invention is to provide a kind of ejector system vacuumized for reactor coolant loop, it adopts sparger, and driving source is pressurized air, has non-energy dynamic response (unpowered parts) and simplification.
Realize the technological scheme of the object of the invention: a kind of ejector system vacuumized for reactor coolant loop, it comprises the sparger one and sparger two that symmetry is arranged in parallel;
Propellant suction port pipeline is divided into two-way through threeway, connects the entrance of sparger one and the entrance of sparger two respectively, makes propellant uniform distribution enter in sparger one and sparger two; Described propellant suction port pipeline arranges suction port stop valve;
Suction port pipeline is divided into symmetrical two-way through threeway, connects the suction chamber of sparger one and the suction chamber of sparger two respectively, air inlet uniformity is distributed; Described suction port pipeline is provided with safety check and stop valve one;
Exhaust line is divided into two-way through threeway, connects the outlet of sparger one and the outlet of sparger two respectively, ensures that the outlet of sparger one and the interruption-forming that goes out of sparger two stablize back pressure; Described exhaust line is provided with stop valve three;
Described suction port pipeline is arranged a vacuum breaking pipeline, vacuum breaking pipeline is provided with stop valve two.
As above for the ejector system that reactor coolant loop vacuumizes, the sparger one described in it and sparger two adopt air ejector, are to drive source of the gas with pressurized air.
As above for the ejector system that reactor coolant loop vacuumizes, the suction chamber of the sparger one described in it is provided with pressure instrument one, and the suction chamber of described sparger two is provided with pressure gauge two.
As above for the ejector system that reactor coolant loop vacuumizes, the suction port line upstream described in it is provided with pressure gauge three.
Effect of the present invention is:
A kind of ejector system vacuumized for reactor coolant loop of the present invention, it is for the vacuum pumping of system in CAP1000 passive PWR nuclear power plant reactor coolant loop start-up course.This system adopts air ejector, is to drive source of the gas, movement-less part, and simple structure list with pressurized air.
This ejector system adopts two single-stage injector parallel connection schemes, not only envelope size is little, and substantially increase rate of air sucked in required, shorten pumpdown time, in 120 minutes, the volume of about 250 cubic metres can be evacuated to 0.01MPa from 0.1MPa, the requirement that CAP1000 reactor coolant loop vacuumizes can be met.
Accompanying drawing explanation
Fig. 1 is a kind of ejector system schematic diagram vacuumized for reactor coolant loop of the present invention;
In figure: 1. propellant suction port pipeline; 2. suction port stop valve; 3. pressure instrument one; 4. sparger one; 5. suction port pipeline; 6. safety check; 7. stop valve one; 8. vacuum breaking pipeline; 9. stop valve two; 10. exhaust line; 11. stop valves three; 12. pressure gauges two; 13. pressure gauges three; 14. spargers two.
Embodiment
Below in conjunction with the drawings and specific embodiments, a kind of ejector system vacuumized for reactor coolant loop of the present invention is further described.
As shown in Figure 1, a kind of ejector system vacuumized for reactor coolant loop of the present invention adopts two injector parallel connection schemes, and two spargers are arranged symmetrically with.
Propellant suction port pipeline 1 is divided into two-way through threeway, connects the entrance of sparger 1 and the entrance of sparger 2 14 respectively, propellant uniform distribution is entered in sparger 1 and sparger 2 14.Described propellant suction port pipeline 1 arranges suction port stop valve 2.
Suction port pipeline 5 is divided into symmetrical two-way through threeway, connects the suction chamber of sparger 1 and the suction chamber of sparger 2 14 respectively, air inlet uniformity is distributed.Described suction port pipeline 5 is provided with safety check 6, prevents gas backflow, is also provided with stop valve 1 simultaneously.
Exhaust line 10 is divided into two-way through threeway, connects the outlet of sparger 1 and the outlet of sparger 2 14 respectively, ensures that the outlet of sparger 1 and the interruption-forming that goes out of sparger 2 14 stablize back pressure.Described exhaust line 10 arranges stop valve 3 11.
Described suction port pipeline 5 is arranged a vacuum breaking pipeline 8, when needs destroy system vacuum, can this pipeline air inlet be passed through.Vacuum breaking pipeline 8 is provided with stop valve 29.
Above-mentioned sparger 1 and sparger 2 14 adopt air ejector, are drive source of the gas with pressurized air.
The suction chamber of sparger 1 is provided with pressure instrument one, and the suction chamber of sparger 2 14 is provided with pressure gauge 2 12, and suction port pipeline 5 upstream is provided with pressure gauge 3 13, for monitoring the performance of sparger.
Ejector system envelope size of the present invention is within 1.9m (length) × 1.5m (wide) × 0.9m (height) scope.In 120 minutes, the volume of about 250 cubic metres can be evacuated to 0.01MPa from 0.1MPa, the requirement that CAP1000 reactor coolant loop vacuumizes can be met.
The installation of ejector system of the present invention and reactor coolant loop is as follows, and propellant suction port pipeline 1, suction port pipeline 5 are connected with reactor coolant loop with exhaust line 10.During operation, close the stop valve 29 on vacuum breaking pipeline 8, open the stop valve 1 on suction port pipeline 5, the stop valve 3 11 on exhaust line 10 and admission line stop valve 2, pressurized gas enter sparger 1 and sparger 2 14, after mixing with the low-pressure gas of suction port pipeline 5, after sparger mixing chamber and diffuser boosting, enter exhaust line 10.When system vacuum reaches requirement, close admission line stop valve 2 and stop valve 1.When needs destroy system vacuum, open stop valve 29.
Claims (4)
1. for the ejector system that reactor coolant loop vacuumizes, it is characterized in that: this ejector system comprises the sparger one (4) and sparger two (14) that symmetry is arranged in parallel;
Propellant suction port pipeline (1) is divided into two-way through threeway, connect the entrance of sparger one (4) and the entrance of sparger two (14) respectively, make propellant uniform distribution enter in sparger one (4) and sparger two (14); Described propellant suction port pipeline (1) arranges suction port stop valve (2);
Suction port pipeline (5) is divided into symmetrical two-way through threeway, connects the suction chamber of sparger one (4) and the suction chamber of sparger two (14) respectively, air inlet uniformity is distributed; Described suction port pipeline (5) is provided with safety check (6) and stop valve one (7);
Exhaust line (10) is divided into two-way through threeway, connect the outlet of sparger one (4) and the outlet of sparger two (14) respectively, ensure that the outlet of sparger one (4) and the interruption-forming that goes out of sparger two (14) stablize back pressure; Described exhaust line (10) arranges stop valve three (11);
Described suction port pipeline (5) is arranged a vacuum breaking pipeline (8), vacuum breaking pipeline (8) is provided with stop valve two (9).
2. a kind of ejector system vacuumized for reactor coolant loop according to claim 1, is characterized in that; Described sparger one (4) and sparger two (14) adopt air ejector, are drive source of the gas with pressurized air.
3. a kind of ejector system vacuumized for reactor coolant loop according to claim 1, is characterized in that; The suction chamber of described sparger one (4) is provided with pressure instrument one, and the suction chamber of described sparger two (14) is provided with pressure gauge two (12).
4. a kind of ejector system vacuumized for reactor coolant loop according to claim 1, is characterized in that; Described suction port pipeline (5) upstream is provided with pressure gauge three (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520026372.1U CN204458569U (en) | 2015-01-14 | 2015-01-14 | A kind of ejector system vacuumized for reactor coolant loop |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520026372.1U CN204458569U (en) | 2015-01-14 | 2015-01-14 | A kind of ejector system vacuumized for reactor coolant loop |
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| CN204458569U true CN204458569U (en) | 2015-07-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832462A (en) * | 2015-01-14 | 2015-08-12 | 上海核工程研究设计院 | Ejector system for vacuum-pumping of reactor coolant system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832462A (en) * | 2015-01-14 | 2015-08-12 | 上海核工程研究设计院 | Ejector system for vacuum-pumping of reactor coolant system |
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| GR01 | Patent grant | ||
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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. Patentee after: XUANDA INDUSTRIAL GROUP Co.,Ltd. Address before: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. Patentee before: XUANDA INDUSTRIAL GROUP Co.,Ltd. Address after: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee after: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. Patentee after: XUANDA INDUSTRIAL GROUP Co.,Ltd. Address before: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Patentee before: XUANDA INDUSTRIAL GROUP Co.,Ltd. |