CN102194534A - High-precision pressing and depressing process for pre-service hydraulic pressure test of steam generator secondary side - Google Patents
High-precision pressing and depressing process for pre-service hydraulic pressure test of steam generator secondary side Download PDFInfo
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- CN102194534A CN102194534A CN2010101304913A CN201010130491A CN102194534A CN 102194534 A CN102194534 A CN 102194534A CN 2010101304913 A CN2010101304913 A CN 2010101304913A CN 201010130491 A CN201010130491 A CN 201010130491A CN 102194534 A CN102194534 A CN 102194534A
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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
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention, which belongs to the filed of pressurized water reactor nuclear power station, discloses particularly a high-precision pressing and depressing process for a pre-service hydraulic pressure test of a steam generator secondary side. The process comprises the follow steps: step (1), injecting hot desalted water into an electric heating water tank and a secondary side; step (2), unlatching an isolating valve for supplementing water of the electric heating water tank and starting a bulk-flow pressurizing pump that is used for suction of the desalted water from the electric heating water tank to inject the desalted water into the secondary side; step (3), carrying out a pressing process: improving a pressure flow of the bulk-flow pressurizing pump so as to enable the pressure of the desalted water in the secondary side to be increased continuously; and step (4), carrying out a depressing process: reducing the pressure flow of the bulk-flow pressurizing pump when the pressure of the desalted water in the secondary side exceeds a highest setting pressure; raising the pressure flow of the bulk-flow pressurizing pump when the pressure of the desalted water in the secondary side is lower than a lowest setting pressure so as to make the pressure value of the desalted water in the secondary side be maintained within a setting range. According to invention, the installation interfaces needed in the high-precision pressing and depressing process are simple, and the pressing and depressing speed can be adjusted accurately. Moreover, the high-precision pressing and depressing process provided in the invention has high security and high performance stability.
Description
Technical field
The invention belongs to PWR nuclear power plant (pressurized-water reactor nuclear power plant) field, be specifically related to the preceding hydraulic testing high precision buck technology of a kind of steam generator secondary side labour.
Background technology
The hydraulic testing is important node and the milestone in the PWR nuclear power plant nuclear island equipment erection schedule before the steam generator secondary side labour.Its scope has covered steam generator secondary side and relative system (comprising main feed system, auxiliary feedwater system, main steam system, drainage or the like) pipeline and isolation boundary-valve.This test comprises that the steam generator secondary side housing heats up, multinomial technological processes such as steam generator secondary side is boosted, pressurize, release, and is boosting, will realize in the stress-relief process the accurate control to buck speed.
The common separate unit pressuring pump technology of boosting is adopted in the hydraulic testing before the steam generator secondary side of the nuclear power station labour in the past, and this technology is on-the-spot, and to need that the interface that connects is installed many, and this process safety is poor, stability is lower.
Summary of the invention
The object of the present invention is to provide hydraulic testing high precision buck technology before a kind of steam generator secondary side labour, the mounting interface of this arts demand is simple, buck speed is accurately adjustable, security and stability height.
Realize the technical scheme of the object of the invention: hydraulic testing high precision buck technology before a kind of steam generator secondary side labour, it may further comprise the steps:
(1) in electric heating water tank and steam generator secondary side, injects hot demineralized water;
(2) open heating water tank moisturizing isolation valve, start big flow pressuring pump, big flow pressuring pump sucks in the demineralized water steam in jection generator secondary side from heating water tank;
(3) process of boosting: improve the flow of suppressing of big flow pressuring pump, the demineralized water in the steam generator secondary side is constantly boosted;
(4) step-down process: when the pressure of demineralized water in the steam generator secondary side surpasses the highest set pressure, reduce the flow of suppressing of big flow pressuring pump, when the pressure of demineralized water in the steam generator secondary side is lower than minimum set pressure, improve the flow of suppressing of big flow pressuring pump, the force value of demineralized water in the steam generator secondary side is remained in the setting range.
When starting big flow pressuring pump, start preposition supercharge pump in the described step (2) simultaneously, preposition supercharge pump for the pressuring pump suction inlet provide enough pressure head with guarantee to suppress supply water uniform and stable.
In the described step (3) when big flow pressuring pump top hole pressure is higher than certain value the adjustable pressure reflux open reflux pipeline automatically, will suppress fluid and be back to preposition supercharging pump intake.
In the described step (3) in the steam generator secondary side demineralized water too fast flow that then reduces pressuring pump that boosts by variable frequency adjustment; Perhaps close big flow pressuring pump, start low discharge pressuring pump (8) and suppress, be no more than the testing requirements value to guarantee that demineralized water boosts in the steam generator secondary side.
In the time can't accurately controlling rate of pressure rise continuously, start crawl outlet solenoid valve and suppress accurate control rate of pressure rise in the described step (3).
In described step (3) is boosted process and described step (4) step-down process, be interrupted being incubated heating to suppressing with demineralized water in the electric heating water tank.
Described step (3) is boosted when big flow pressuring pump top hole pressure surpasses setup pressure value in process and described step (4) the step-down process; safety valve is opened automatically; by system's drainage interface exclusive segment demineralized water; the pressure of this process system is reduced, thereby to steam generator secondary side is carried out overpressure protection.
Useful technique effect of the present invention is: by multiple flow regulation modes of suppressing such as many pump couplings, single pump frequency conversion and by-pass flow releases, realized that the ascending, descending of system presses speed accurately adjustable, degree of regulation height, safe.Guaranteed by suppressing outlet safety valve and superpressure reflux pipeline that system boosts, device security and personal security in pressurize and the stress-relief process.The spring safety valve of the different set-pressures by suppressing the exit has guaranteed the security of the hydraulic testing, with the security of operation that guarantees equipment and operating personnel's safety.By the pressuring pump coupling switchover operation of 2 different flows, the control system rate of rise; By the flow of variable frequency adjustment separate unit pressuring pump, the control system rate of rise; Keep the pressuring pump operation, suppress the outlet solenoid valve by being interrupted to open, the realization crawl is suppressed the rate of rise of control system; Regulate by-pass flow by bypass high precision release variable valve, speed is pressed in the ascending, descending of control system; Adopt the chain termination of pumping setting of pressure setting: when system pressure arrives a certain setting valve (adjustable), the control system termination of pumping of cutting off the power supply automatically, this is provided with the system of having guaranteed the superpressure operating mode can not occur in test.Suppress the accurate adjusted design of flow: by frequency conversion suppress, many pumps couplings, crawl suppress (not termination of pumping) and transient equilibrium and the multiple mode of suppressing such as suppress, and guaranteed the accurate control of system's buck speed.Hydraulic testing maltilevel security design: suppress delivery side of pump and system always suppresses the spring safety valve that the exit is provided with different set-pressures at every; Adjustable pressure setting reflux pipeline is set suppressing outlet, when suppressing outlet and rise to certain pressure, system opens the bypassing reflux stream pipeline automatically, to guarantee that suppressing outlet can not continue to rise to superpressure.
Description of drawings
Fig. 1 is a hydraulic testing high precision buck process system synoptic diagram before a kind of steam generator secondary side labour provided by the present invention.
Among the figure: 1. steam generator secondary side; 2. steam generator secondary side hand hole temporary interface; 3. high-pressure hose; 4. high power density electric heating water tank; 5. ebullator; 6. preposition supercharge pump; 7. big flow pressuring pump; 8. low discharge pressuring pump; 9. bypass release variable valve; 10. adjustable pressure reflux; 11. suppress the outlet safety valve; 12. suppress the outlet solenoid valve; 13. radiator drain; 14. tank drains pipe; 15. system water supplement interface; 16. suppress the suction inlet isolation valve; Gather pipe 17. suppress outlet; 18. suppress the by-pass flow isolation valve; 19. safety valve pipeline isolation valve; 20. suppress delivery gauge; Export tensimeter on the spot 21. suppress; 22. water tank moisturizing isolation valve; 23. tank drains isolation valve; 24. hand hole is taken over temporarily; 25. high pressure isolation valve; 26. big flow pressuring pump outlet non-return valve; 27. low discharge pressuring pump outlet non-return valve; 28. reflux pipeline; 29. bypass release pipeline; 30. safety valve release pipeline; 31. pressure gauge isolator valve on the spot; 32. system's drainage interface.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail.
As shown in Figure 1, hydraulic testing high precision buck process system before a kind of steam generator secondary side labour, it comprises high-pressure hose 3, high power density electric heating water tank 4, ebullator 5, preposition supercharge pump 6, big flow pressuring pump 7, low discharge pressuring pump 8, bypass release variable valve 9, adjustable pressure reflux 10, suppress outlet safety valve 11, suppress outlet solenoid valve 12, system water supplement interface 15, suppress suction inlet isolation valve 16, suppress outlet and gather pipe 17, suppress by-pass flow isolation valve 18, safety valve pipeline isolation valve 19, suppress delivery gauge 20, suppress and export tensimeter 21 on the spot, water tank moisturizing isolation valve 22, tank drains isolation valve 23, hand hole is interim takes over 24, high pressure isolation valve 25, big flow pressuring pump outlet non-return valve 26, low discharge pressuring pump outlet non-return valve 27, reflux pipeline 28, bypass release pipeline 29, safety valve release pipeline 30, pressure gauge isolator valve 31 and system's drainage interface 32 on the spot.
As shown in Figure 1, high power density electric heating water tank 4 bottoms are provided with water tank filling pipe 5, tank drains pipe 14 and radiator drain 13 water tanks respectively.Water tank filling pipe 5 is provided with water tank moisturizing isolation valve 22, and the end that suspends of water tank filling pipe 5 is communicated with system water supplement interface 15.Tank drains pipe 14 is provided with tank drains isolation valve 23.The downstream of tank drains pipe 14 is aggregated into system's drainage interface 32 places by pipeline.
As shown in Figure 1, preposition supercharge pump 6, big flow pressuring pump 7, low discharge pressuring pump 8, adjustable pressure reflux 10 and suppress outlet solenoid valve 12 and constituted the pressuring pump unit jointly, wherein big flow pressuring pump 7 and low discharge pressuring pump 8 are arranged in parallel, the exit of every pressuring pump is provided with big flow pressuring pump outlet non-return valve 26 and low discharge pressuring pump outlet non-return valve 27 respectively, and preposition supercharge pump 6 is arranged on the upstream of two pressuring pumps and suppresses intake head for it provides.The suction inlet pipeline of preposition supercharge pump 6 is communicated with and is provided with between the two with high power density electric heating water tank 4 outlets suppresses suction inlet isolation valve 16.After two pressuring pump 7,8 parallel connections, gather at its pump discharge an adjustable pressure reflux 10 is set on the pipeline, this reflux 10 can be opened reflux pipeline 28 when suppressing top hole pressure and be higher than certain value (this setting valve is adjustable), will suppress the suction inlet that fluid is back to preposition supercharge pump 6.Gather on the pipeline in the pressuring pump outlet, the downstream of adjustable pressure reflux 10 is provided with one and suppresses outlet solenoid valve 12, this solenoid valve 12 opens and closes to make and suppresses reflux pipeline 28 and is interrupted injection suppresses fluid under the operating mode that pressuring pump 7,8 is not stopped transport, and suppresses the realization of technology to guarantee crawl.The outlet of suppressing of pressuring pump unit is connected with steam generator secondary side hand hole temporary interface 2 by high-pressure hose 3, between high-pressure hose 3 and the steam generator secondary side hand hole temporary interface 2 high pressure isolation valve 25 is set.
As shown in Figure 1, suppress the outlet gather the pipe 17 on, at adjustable pressure reflux 10 and suppress outlet and be provided with between the solenoid valve 12 and suppress delivery gauge 20, be respectively arranged with one between outlet solenoid valve 12 and the high-pressure hose 3 and suppress and export on the spot tensimeter 21, a bypass release pipeline 29 and a safety valve release pipeline 30 suppressing.
As shown in Figure 1, suppress and export on the spot that the provided upstream of tensimeter 21 is equipped with a pressure gauge isolator valve 31 on the spot.
As shown in Figure 1, series connection is provided with a safety valve pipeline isolation valve 19 and one and suppresses outlet safety valve 11 on the safety valve release pipeline 30.
As shown in Figure 1, bypass release pipeline 29 has been provided with one and has suppressed by-pass flow isolation valve 18 and two bypass release variable valve 9.Two bypass release variable valve 9 are arranged in parallel and constitute the variable valve group, suppress by-pass flow isolation valve 18 and are arranged on variable valve group upstream.
As shown in Figure 1, two bypass release variable valve 9 and suppress the outlet safety valve 11 the downstream be aggregated into system's drainage interface 32 places by pipeline.
As shown in Figure 1, hydraulic testing high precision buck technology before a kind of steam generator secondary side labour, it may further comprise the steps:
(1) in electric heating water tank 4 and steam generator secondary side 1, injects the demineralized water that heats;
The temperature range of demineralized water is 30 ℃～70 ℃.
(2) open heating water tank moisturizing isolation valve 22, start big flow pressuring pump 7, big flow pressuring pump 7 sucks demineralized water by in the high-pressure hose 3 steam in jection generator secondary sides 1 from heating water tank 4;
(3) process of boosting: improve the flow of suppressing of big flow pressuring pump 7, the demineralized water in the steam generator secondary side 1 is constantly boosted;
Also can start preposition supercharge pump 6 simultaneously when starting big flow pressuring pump 7, preposition supercharge pump 6 be a centrifugal pump of vertical axis, for the pressuring pump suction inlet provides enough pressure head uniform and stable to guarantee suppressing water supply.
The flow range of suppressing of big flow pressuring pump 7 is 2m
3/ h～10m
3/ h.
Suppress outlet and gather pipe and 17 be provided with adjustable pressure reflux 10, this adjustable pressure reflux 10 is opened reflux pipeline 28 automatically when suppressing top hole pressure and be higher than certain value, will suppress the suction inlet that fluid (demineralized water) is back to preposition supercharge pump 6.Suppressing top hole pressure records by suppressing delivery gauge 20.Suppress top hole pressure and remain in 0.1MPa a.～42.2MPa scope,, open reflux pipeline 51 in the time of then automatically when adjustable pressure reflux 10 can be higher than 42.2MPa suppressing top hole pressure.
In the time can't accurately controlling rate of pressure rise continuously, can adopt the control mode control of crawl outlet solenoid valve 12 to suppress.Suppress the outlet gather the pipe 17 on, the downstream of adjustable pressure reflux 10 is provided with suppresses outlet solenoid valve 12, this keying of suppressing outlet solenoid valve 12 can make to be suppressed reflux pipeline 51 and is interrupted to inject under the operating mode that big flow pressuring pump 7, low discharge pressuring pump 8 are not stopped transport and suppresses fluid, suppresses the realization of technology to guarantee crawl.
(4) step-down process: when the pressure of demineralized water in the steam generator secondary side 11 surpasses the highest set pressure, reduce the flow of suppressing of big flow pressuring pump 7, when the pressure of demineralized water in the steam generator secondary side 1 is lower than minimum set pressure, improve the flow of suppressing of big flow pressuring pump 7, the force value of demineralized water in the steam generator secondary side 1 is remained in the setting range.
The pressure setting range of demineralized water is 0.1MPa a.～42.2MPa in the steam generator secondary side 1.This pressure can export on the spot that tensimeter 21 records by suppressing delivery gauge 20 and suppressing, and also can record by the tensimeter of being installed on the relevant pipeline of steam generator secondary side.
When demineralized water in the steam generator secondary side 1 rise to certain pressure after, system boosted too fast when big flow pressuring pump 7 full flows were suppressed, the force value of promptly suppressing delivery gauge 20 changes when excessive, the force value of promptly suppressing delivery gauge 20 changes when surpassing 0.4Mpa/min, then reduces the flow of pressuring pump 7 by variable frequency adjustment; Also can close big flow pressuring pump 7, starting low discharge pressuring pump 8 suppresses, along with the rising of system pressure, low discharge pressuring pump 8 also can reduce by variable frequency adjustment suppresses flow, is no more than testing requirements value 42.2MPa to guarantee that demineralized water boosts in the steam generator secondary side 1.Low discharge pressuring pump 8 suppress flow range: 0.1m
3/ h～2m
3/ h.
Big flow pressuring pump 7 and low discharge pressuring pump 8 all adopt plunger type frequency conversion pressuring pump: pressuring pump, adopt variable-frequency motor (frequency converter of configure dedicated) to drive, can be at the suppress flow of the rotating speed of different system pressure stages by the variable frequency adjustment drive motor with control pump.
For guaranteeing that the demineralized water that injects during the bulge test does not influence the temperature of steam generator secondary side 1 and main body pressure-bearing material, suppress and can be interrupted startup electric heating water tank 4 in the process, be incubated heating to suppressing with demineralized water in the electric heating water tank 4.
On the safety valve release pipeline 30 of this process system, be provided with safety valve 11, steam generator secondary side 1 is carried out overpressure protection.When suppressing pressure that top hole pressure 21 measures and surpassing setup pressure value 13.6Mpa, safety valve 11 is opened, and by system's drainage interface 32 exclusive segment demineralized waters, the pressure of this process system is reduced, thereby steam generator secondary side 1 is carried out overpressure protection.
Bypass release pipeline 29 is provided with regulates high precision bypass release variable valve 9.When boosting process, control by the flow of adjusting high precision bypass release variable valve 9 and to suppress the rate of pressure rise that outlet gathers demineralized waters in the pipe 17, rate of pressure rise should be controlled at below the 0.4Mpa/min, this value calculates according to the pressure measuring value of testing suppressed time and different phase by operating personnel or control system, thus the rate of pressure rise of demineralized water in the control steam generator secondary side 1.During the step-down process, control by the flow of adjusting high precision bypass release variable valve 9 and to suppress the rate of pressure reduction that outlet gathers pipe 17, when system's rate of rise is too fast, the aperture that increases high precision bypass release variable valve 9 is to increase the by-pass flow flow, thereby reduced by suppressing the flow of suppressing that pipeline enters steam generator secondary side, then turned down the rate of pressure rise of system, thereby the rate of pressure reduction of demineralized water in the control steam generator secondary side 1, rate of pressure reduction should be controlled at below the 0.4Mpa/min, and this value calculates according to the pressure measuring value of testing suppressed time and different phase by operating personnel or control system.If in the system high pressure stage, the unmanageable situation of release excessive velocities still appears in high precision bypass release variable valve 9 under less aperture, then can keep pressuring pump operation under suitable flow to carry out ftercompction), be no more than the testing requirements limit value with the rate of pressure reduction of guaranteeing system.The flow range of high precision bypass release variable valve 9 is 0.1m3/h～10m3/h.
When the boost in pressure of demineralized water in the steam generator secondary side 1 during, steam generator secondary side and related system member are checked according to the relevant rules of the steam generator hydraulic testing to each pressure platform of regulation and resulting pressure platform.
Preposition supercharge pump 6: adopt 1 centrifugal pump of vertical axis as preposition supercharge pump 6, for the pressuring pump suction inlet provide enough pressure head with guarantee to suppress supply water uniform and stable.
Big flow pressuring pump 7 and low discharge pressuring pump 8 all adopt plunger type frequency conversion pressuring pump, adopt variable-frequency motor (frequency converter of configure dedicated) to drive, can be at the suppress flow of the rotating speed of different system pressure stages by the variable frequency adjustment drive motor with control pump.
High precision bypass release variable valve 9: be arranged in parallel 2 high-precision bypass release variable valve 9 in the release bypass, to regulate bypass flow, this bypass release variable valve 9 can realize that the high-precision flow under High Pressure Difference, the transformation difference operating mode regulates, with guarantee to suppress, the accurate control of release flow.
Adjustable pressure reflux 10: in system, be provided with 1 cover setting valve adjustable suppress reflux 10, when system suppresses top hole pressure and is higher than setting valve, this device is opened reflux pipeline 28 automatically, the water under high pressure of pressuring pump 7,8 outlet is back to the suction inlet of supercharge pump 6, maintains below the set-pressure with the top hole pressure of suppressing that guarantees high precision ascending, descending pressing system.
Suppress outlet solenoid valve 12: the outlet of always suppressing in system is provided with 1 high pressure and suppresses outlet solenoid valve 12, can guarantee to suppress the quick switching of pipeline, suppresses function with the crawl of realizing system.
In conjunction with the accompanying drawings embodiments of the invention have been done detailed description above, but the present invention is not limited to the foregoing description, in the ken that those of ordinary skills possessed, can also under the prerequisite that does not break away from aim of the present invention, makes various variations.The content that is not described in detail in the instructions of the present invention all can adopt prior art, for example demineralized water, high-pressure hose 3, high power density electric heating water tank 4, ebullator 5, preposition supercharge pump 6, big flow pressuring pump 7, low discharge pressuring pump 8, bypass release variable valve 9, adjustable pressure reflux 10, suppress outlet safety valve 11, suppress outlet solenoid valve 12, system water supplement interface 15, suppress suction inlet isolation valve 16, suppress outlet and gather pipe 17, suppress by-pass flow isolation valve 18, safety valve pipeline isolation valve 19, suppress delivery gauge 20, suppress and export tensimeter 21 on the spot, water tank moisturizing isolation valve 22, tank drains isolation valve 23, hand hole is interim takes over 24, high pressure isolation valve 25, big flow pressuring pump outlet non-return valve 26, low discharge pressuring pump outlet non-return valve 27, reflux pipeline 28, bypass release pipeline 29, safety valve release pipeline 30, pressure gauge isolator valve 31 and system's drainage interface 32 etc. all can adopt the product of any model in the prior art on the spot.
Claims (7)
1. hydraulic testing high precision buck technology before a steam generator secondary side is used as a servant, it is characterized in that: it may further comprise the steps:
(1) in electric heating water tank (4) and steam generator secondary side (1), injects hot demineralized water;
(2) open heating water tank moisturizing isolation valve (22), start big flow pressuring pump (7), big flow pressuring pump (7) sucks in the demineralized water steam in jection generator secondary side (1) from heating water tank (4);
(3) process of boosting: improve the flow of suppressing of big flow pressuring pump (7), the demineralized water in the steam generator secondary side (1) is constantly boosted;
(4) step-down process: when the pressure of demineralized water in the steam generator secondary side (1) surpasses the highest set pressure, reduce the flow of suppressing of big flow pressuring pump (7), when the pressure of demineralized water in the steam generator secondary side (1) is lower than minimum set pressure, improve the flow of suppressing of big flow pressuring pump (7), the force value of the interior demineralized water of steam generator secondary side (1) is remained in the setting range.
2. hydraulic testing high precision buck technology before a kind of steam generator secondary side labour according to claim 1, it is characterized in that: start preposition supercharge pump (6) in the described step (2) when starting big flow pressuring pump (7) simultaneously, preposition supercharge pump (6) is uniform and stable for the pressuring pump suction inlet provides enough pressure heads to suppress water supply with assurance.
3. hydraulic testing high precision buck technology before a kind of steam generator secondary side labour according to claim 2, it is characterized in that: in the described step (3) when big flow pressuring pump (7) when top hole pressure is higher than certain value adjustable pressure reflux (10) open reflux pipeline (28) automatically, will suppress the suction inlet that fluid is back to preposition supercharge pump (6).
4. hydraulic testing high precision buck technology before a kind of steam generator secondary side labour according to claim 1 and 2 is characterized in that: in the described step (3) when interior the demineralized water of steam generator secondary side (1) the too fast then flow by variable frequency adjustment reduction pressuring pump (7) that boosts; Perhaps close big flow pressuring pump (7), start low discharge pressuring pump (8) and suppress, be no more than the testing requirements value to guarantee that the interior demineralized water of steam generator secondary side (1) boosts.
5. hydraulic testing high precision buck technology before a kind of steam generator secondary side labour according to claim 1 and 2, it is characterized in that: in the time can't accurately controlling rate of pressure rise continuously, start crawl outlet solenoid valve (12) and suppress accurate control rate of pressure rise in the described step (3).
6. hydraulic testing high precision buck technology before a kind of steam generator secondary side labour according to claim 1 and 2, it is characterized in that: in described step (3) is boosted process and described step (4) step-down process, be interrupted being incubated heating suppressing with demineralized water in the electric heating water tank (4).
7. hydraulic testing high precision buck technology before a kind of steam generator secondary side labour according to claim 1 and 2; it is characterized in that: described step (3) is boosted when big flow pressuring pump (7) top hole pressure surpasses setup pressure value in process and described step (4) the step-down process; safety valve (11) is opened automatically; by system's drainage interface (32) exclusive segment demineralized water; the pressure of this process system is reduced, thereby to steam generator secondary side (1) is carried out overpressure protection.
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| CN105719705A (en) * | 2014-12-01 | 2016-06-29 | 上海核工程研究设计院 | Outlet connection pipe in pressurized water reactor integral hydraulic simulation test |
| CN104575639A (en) * | 2015-01-27 | 2015-04-29 | 深圳东方锅炉控制有限公司 | Full-automatic hydrostatic test device for nuclear power container |
| CN104952495A (en) * | 2015-06-26 | 2015-09-30 | 上海核工程研究设计院 | Secondary side residual heat removal system for twin-reactor nuclear power plant |
| CN108511090A (en) * | 2018-03-08 | 2018-09-07 | 中国核电工程有限公司 | A kind of cooling water tank component of nuclear power plant's secondary side passive cooling system |
| CN109799142A (en) * | 2018-12-20 | 2019-05-24 | 中广核核电运营有限公司 | Nuclear power station water pressure test loop heating system and circular heating method |
| CN109799142B (en) * | 2018-12-20 | 2021-11-09 | 中广核核电运营有限公司 | Circulating heating system and circulating heating method for nuclear power station hydrostatic test |
| CN111022926A (en) * | 2019-12-20 | 2020-04-17 | 河南开祥精细化工有限公司 | Steam balancing device and using method thereof |
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