CN204530859U - Nuclear power plant's emergency feedwater supply system flow control device - Google Patents
Nuclear power plant's emergency feedwater supply system flow control device Download PDFInfo
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- CN204530859U CN204530859U CN201420759038.2U CN201420759038U CN204530859U CN 204530859 U CN204530859 U CN 204530859U CN 201420759038 U CN201420759038 U CN 201420759038U CN 204530859 U CN204530859 U CN 204530859U
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Abstract
The utility model discloses a kind of nuclear power plant emergency feedwater supply system flow control device, it comprises multiple pneumatic flowrate control valve, provides compressed-air actuated air compressor (SAR) and store compressed-air actuated compressed air reservoir for pneumatic flowrate control valve; The diverse location place on emergency feedwater supply system water-supply line is located at respectively by described multiple pneumatic flowrate control valve, regulates the emergency feedwater flow of place water-supply line; Described compressed air reservoir is connected with each pneumatic flowrate control valve by gas supply line, with when air compressor is unavailable for pneumatic flowrate control valve air feed.Compared with prior art, the utility model nuclear power plant emergency feedwater supply system flow control device is by setting up compressed air reservoir, ensure that the reliability of the pneumatic flowrate control valve compressed air source of emergency feedwater supply system, when guaranteeing that SAR system is unavailable under accident conditions, still control the aperture of pneumatic flowrate control valve by main control room, maintain the liquid level of steam generator.
Description
Technical field
The utility model belongs to nuclear power and runs control field, and more particularly, the utility model relates to a kind of nuclear power plant emergency feedwater supply system flow control device.
Background technology
In PWR nuclear power plant, the major function of emergency feedwater supply system is steam generator water-filling before unit starting, for steam generator provides feedwater under accident conditions, to discharge residual heat of nuclear core.In incident processing procedure, in order to maintain the liquid level of steam generator, avoid steam generator spill-over and cause secondary side heat rejection function to be lost, emergency feedwater supply system also needs to be regulated feedwater flow by emergency feedwater flow control valve.
Refer to Fig. 1, in existing PWR nuclear power plant unit, under accident conditions, emergency feedwater flow by four emergency feedwater pumps 10,12 (wherein, 10 is electrodynamic pump, 12 is pneumatic pump) to fetch water from emergency feedwater case 14, emergency feedwater is by sending into three steam generators 18 respectively after flow control valve 16.Flow control valve 16 is pneumatic control valve, needs to provide compressed air by SAR system 20 (air compressor) during operation.But, because SAR system 20 is non-security level, non-vibration prevention system, therefore probably lost efficacy under accident conditions, thus cause emergency feedwater flow control valve 16 lose compressed air and keep standard-sized sheet, cannot be adjusted at main control room.
When SAR system 20 is unavailable, prior art will adopt the mode of start and stop emergency feedwater pump 10,12, controls feedwater flow with the operation quantity of emergency feedwater pump 10,12, avoids steam generator 18 spill-over.But, rated current due to electrodynamic pump 10 is generally tens of ampere, (rated current as a certain conventional model electrodynamic pump is 59.5A to the several times of starting current rated current often again, starting current is 6.6 times of rated current), therefore larger current required when electrodynamic pump 10 starts can produce circuit impacts, and frequent starting also can cause damage to motor component, so that affect the application life of motor and the reliability of electrodynamic pump 10.The more important thing is, start and stop emergency feedwater pump 10,12 can cause liquid level in steam generator 18 to occur to fluctuate more tempestuously, and be unfavorable for very much the judgement of operator, also just can not control the liquid level of steam generator 18 well, this can have influence on the process of accident undoubtedly.
In view of this, necessaryly provide a kind of under accident conditions, ensure available nuclear power plant's emergency feedwater supply system flow control device.
Utility model content
The purpose of this utility model is: provide a kind of under accident conditions, ensure available nuclear power plant's emergency feedwater supply system flow control device, still by the control of master-control room, can effectively maintain steam generator liquid level under accident conditions.
In order to realize above-mentioned utility model object, the utility model provides a kind of nuclear power plant emergency feedwater supply system flow control device, and it comprises multiple pneumatic flowrate control valve, provides compressed-air actuated air compressor and store compressed-air actuated compressed air reservoir for pneumatic flowrate control valve; The diverse location place on emergency feedwater supply system water-supply line is located at respectively by described multiple pneumatic flowrate control valve, regulates the emergency feedwater flow of place water-supply line; Described compressed air reservoir is connected with each pneumatic flowrate control valve by gas supply line, with when air compressor is unavailable for pneumatic flowrate control valve air feed.
One as the utility model nuclear power plant emergency feedwater supply system flow control device is improved, also be included in air compressor and compressed air reservoir all lost efficacy after be the mobile compressed air unit of pneumatic flowrate control valve air feed, mobile compressed air unit accesses gas supply line by fast interface.
One as the utility model nuclear power plant emergency feedwater supply system flow control device is improved, and the dischargeable capacity of described compressed air reservoir is set as being enough to meet all pneumatic flowrate control valves compressed air consumption of eight hours.
One as the utility model nuclear power plant emergency feedwater supply system flow control device is improved, described gas supply line comprises the gas manifold that an air feed mother be connected with compressed air reservoir manages and many separate from the female pipe of air feed, and every bar gas manifold is connected to a pneumatic flowrate control valve and is its air feed.
One as the utility model nuclear power plant emergency feedwater supply system flow control device is improved, and the female pipe of described air feed is provided with isolating valve.
One as the utility model nuclear power plant emergency feedwater supply system flow control device is improved, and described multiple pneumatic flowrate control valve is separately positioned on electrodynamic pump and pneumatic pump provides on the water supply line of power; Two gas manifolds that gas supply line comprises an air feed mother pipe and separates from the female pipe of air feed, two gas manifolds are respectively the pneumatic flowrate control valve air feed of electrodynamic pump, pneumatic pump place water supply line.
One as the utility model nuclear power plant emergency feedwater supply system flow control device is improved, and described two gas manifolds need to arrange isolating valve respectively.
One as the utility model nuclear power plant emergency feedwater supply system flow control device is improved, described air compressor is connected with pneumatic flowrate control valve by same gas supply line with compressed air reservoir, and the two joint on the female pipe of air feed is called access point; Pipeline between access point and compressed air reservoir is provided with an isolating valve, the pipeline between access point and air compressor is provided with a flap valve.
Compared with prior art, the utility model nuclear power plant emergency feedwater supply system flow control device is by setting up compressed air reservoir, ensure that the reliability of the pneumatic flowrate control valve compressed air source of emergency feedwater supply system, when guaranteeing that SAR system is unavailable under accident conditions, the aperture of pneumatic flowrate control valve is still controlled by main control room, maintain the liquid level of steam generator, thus avoid the frequent start-stop of emergency feedwater pump, improve the safety of PWR nuclear power plant.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model nuclear power plant emergency feedwater supply system flow control device and beneficial effect thereof are described in detail.
Fig. 1 is the structural representation of existing nuclear power plant emergency feedwater supply system and governor motion thereof.
Fig. 2 is the structural representation of an embodiment of the utility model nuclear power plant emergency feedwater supply system and flow control device thereof.
Fig. 3 is the structural representation of another modified embodiment of the utility model nuclear power plant emergency feedwater supply system and flow control device thereof.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and Advantageous Effects thereof more clear, below in conjunction with the drawings and specific embodiments, the utility model is further elaborated.Should be understood that, the detailed description of the invention described in this manual is only used to explain the utility model, is not intended to limit the utility model.
Refer to Fig. 2 and Fig. 3, the utility model nuclear power plant emergency feedwater supply system flow control device comprises pneumatic flowrate control valve 16, SAR system 20, compressed air reservoir 30 and gas supply line.
The quantity of pneumatic flowrate control valve 16 is multiple, is located at the diverse location place on emergency feedwater supply system water-supply line 15 respectively, for regulating the emergency feedwater flow of place water-supply line 15.
SAR system 20 is air supply systems of emergency feedwater supply system, its by gas supply line for pneumatic flowrate control valve 16 provides compressed air.
Compressed air reservoir 30 for storing compressed air, using when SAR system 20 lost efficacy for pneumatic flowrate control valve 16 provides compressed air as the power of valve opening and closing, its dischargeable capacity can adjust according to the actual needs of pneumatic flowrate control valve 16.Codes and standards due to existing PWR nuclear power plant require that emergency feedwater supply system and atmospheric steam dump system should continue in eight hours to discharge residual heat of nuclear core after accident, emergency feedwater supply system is generally be furnished with six pneumatic flowrate control valves 16, therefore, the dischargeable capacity of compressed air reservoir 30 preferably sets by six control valves compressed air consumption of eight hours.
Compressed air reservoir 30 is pneumatic flowrate control valve 16 air feed by gas supply line.Gas supply line comprises a female pipe 40 of the air feed be connected with compressed air reservoir 30 and six gas manifolds 42 separated from female pipe 40 downstream of air feed, and every bar gas manifold 42 is connected to a pneumatic flowrate control valve 16 respectively and is valve air feed.The female pipe 40 of air feed is provided with isolating valve 400.
In reality is built, according to field condition, compressed air reservoir 30 can use the original gas supply line of SAR system 20, also partly or entirely separately can establish gas supply line.In the exemplary embodiment illustrated in fig. 2, compressed air reservoir 30 is exactly directly accessed in original gas supply line of SAR system 20, in this case, also need the female pipe 40 of the air feed between access point 44 and compressed air reservoir 30 arranges an isolating valve 402, and pipeline between access point 44 and SAR system 20 arranges a flap valve 22.
Refer to Fig. 3, due under accident conditions, emergency feedwater pump 10,12 is not four and runs simultaneously, but only runs two electrodynamic pumps 10 or only run two pneumatic pumps 12.Therefore, in order to make full use of the gas-storing capacity of compressed air reservoir 30, realize the object improving pot life, can be divided into two gas manifolds 50,52 from the female pipe 56 of compressed air reservoir 30 air feed out, two gas manifolds 50,52 are respectively pneumatic flowrate control valve 16 air feed of electrodynamic pump 10, pneumatic pump 12 place water supply line.Certainly, two gas manifolds 50,52 need to arrange isolating valve 500,520 respectively.
If compressed air reservoir 30 has accessed in original gas supply line of SAR system 20, then need equally the female pipe 56 of the air feed between access point 54 and compressed air reservoir 30 arranges an isolating valve 562, and pipeline between access point 54 and SAR system 20 arranges a flap valve 22.
In addition, consider under major accident operating mode, need secondary side systems stay to discharge residual heat of nuclear core, to wait for that external power source recovers, therefore the utility model has also set up mobile compressed air unit (not shown) for pneumatic flowrate control valve 16.Mobile compressed air unit accesses by the fast interface 70 arranged on the female pipe 40,56 of air feed, thus after accident occurs 8 hours, when compressed air in compressed air reservoir 30 is finished, for pneumatic flowrate control valve 16 provides compressed air, ensure that pneumatic flowrate control valve 16 still can accept the control of master-control room, regulate the flow of emergency feedwater as required.
When SAR system 20 is normally run, the pneumatic flowrate control valve 16 of emergency feedwater supply system provides compressed air by SAR system 20.When accident conditions causes SAR system 20 unavailable, the pneumatic flowrate control valve 16 of emergency feedwater supply system, by compressed air reservoir 30 air feed, continues the liquid level controlling steam generator 18, makes reactor core reach the condition of residual heat removal system access.If compressed air reservoir 30 air feed is after 8 hours, emergency feedwater supply system also needs to run, then access mobile compressed air unit by fast interface 70 and come, for pneumatic flowrate control valve 16 air feed, to guarantee that master-control room can continue the liquid level of steam regulation generator 18.
Known by describing above, the utility model nuclear power plant emergency feedwater supply system flow control device is by setting up compressed air reservoir 30 and mobile compressed air unit, ensure that the reliability of pneumatic flowrate control valve 16 compressed air source of emergency feedwater supply system, when guaranteeing that SAR system 20 is unavailable under accident conditions, the aperture of pneumatic flowrate control valve 16 is still controlled by main control room, maintain the liquid level of steam generator 18, thus avoid the frequent start-stop of emergency feedwater pump 10,12, improve the safety of PWR nuclear power plant.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also carry out suitable change and amendment to above-mentioned embodiment.Therefore, the utility model is not limited to detailed description of the invention disclosed and described above, also should fall in the protection domain of claim of the present utility model modifications and changes more of the present utility model.In addition, although employ some specific terms in this manual, these terms just for convenience of description, do not form any restriction to the utility model.
Claims (9)
1. nuclear power plant's emergency feedwater supply system flow control device, comprises multiple pneumatic flowrate control valve and provides compressed-air actuated air compressor for pneumatic flowrate control valve; The diverse location place on emergency feedwater supply system water-supply line is located at respectively by described multiple pneumatic flowrate control valve, regulates the emergency feedwater flow of place water-supply line; It is characterized in that: also comprise and store compressed-air actuated compressed air reservoir, described compressed air reservoir is connected with each pneumatic flowrate control valve by gas supply line, with when air compressor is unavailable for pneumatic flowrate control valve air feed.
2. nuclear power plant according to claim 1 emergency feedwater supply system flow control device, it is characterized in that: be also included in air compressor and compressed air reservoir all lost efficacy after be the mobile compressed air unit of pneumatic flowrate control valve air feed, mobile compressed air unit accesses gas supply line by fast interface.
3. nuclear power plant according to claim 1 and 2 emergency feedwater supply system flow control device, is characterized in that: the dischargeable capacity of described compressed air reservoir is set as being enough to meet all pneumatic flowrate control valves compressed air consumption of eight hours.
4. nuclear power plant according to claim 1 and 2 emergency feedwater supply system flow control device, it is characterized in that: described gas supply line comprises the gas manifold that an air feed mother be connected with compressed air reservoir manages and many separate from the female pipe of air feed, and every bar gas manifold is connected to a pneumatic flowrate control valve and is its air feed.
5. nuclear power plant according to claim 4 emergency feedwater supply system flow control device, is characterized in that: the female pipe of described air feed is provided with isolating valve.
6. nuclear power plant according to claim 1 and 2 emergency feedwater supply system flow control device, is characterized in that: described multiple pneumatic flowrate control valve is separately positioned on electrodynamic pump and pneumatic pump provides on the water supply line of power; Two gas manifolds that gas supply line comprises an air feed mother pipe and separates from the female pipe of air feed, two gas manifolds are respectively the pneumatic flowrate control valve air feed of electrodynamic pump, pneumatic pump place water supply line.
7. nuclear power plant according to claim 6 emergency feedwater supply system flow control device, is characterized in that: described two gas manifolds need to arrange isolating valve respectively.
8. nuclear power plant according to claim 4 emergency feedwater supply system flow control device, it is characterized in that: described air compressor is connected with pneumatic flowrate control valve by same gas supply line with compressed air reservoir, the two joint on the female pipe of air feed is called access point; Pipeline between access point and compressed air reservoir is provided with an isolating valve, the pipeline between access point and air compressor is provided with a flap valve.
9. nuclear power plant according to claim 6 emergency feedwater supply system flow control device, it is characterized in that: described air compressor is connected with pneumatic flowrate control valve by same gas supply line with compressed air reservoir, the two joint on the female pipe of air feed is called access point; Pipeline between access point and compressed air reservoir is provided with an isolating valve, the pipeline between access point and air compressor is provided with a flap valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420759038.2U CN204530859U (en) | 2014-12-05 | 2014-12-05 | Nuclear power plant's emergency feedwater supply system flow control device |
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| CN201420759038.2U CN204530859U (en) | 2014-12-05 | 2014-12-05 | Nuclear power plant's emergency feedwater supply system flow control device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105805553A (en) * | 2016-05-06 | 2016-07-27 | 上海核工程研究设计院 | Emergency meeting compressed air system of nuclear power station |
| CN108870787A (en) * | 2018-07-16 | 2018-11-23 | 东方电气集团东方锅炉股份有限公司 | A kind of tower fused salt heat dump compressed air system |
| CN115893729A (en) * | 2022-11-21 | 2023-04-04 | 深圳市互成自动化设备有限公司 | Automatic change online depainting solution recovery plant |
-
2014
- 2014-12-05 CN CN201420759038.2U patent/CN204530859U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105805553A (en) * | 2016-05-06 | 2016-07-27 | 上海核工程研究设计院 | Emergency meeting compressed air system of nuclear power station |
| CN108870787A (en) * | 2018-07-16 | 2018-11-23 | 东方电气集团东方锅炉股份有限公司 | A kind of tower fused salt heat dump compressed air system |
| CN115893729A (en) * | 2022-11-21 | 2023-04-04 | 深圳市互成自动化设备有限公司 | Automatic change online depainting solution recovery plant |
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