CN110379526A

CN110379526A - Pressurized water reactor nuclear island container blowing method and row's hydrogen purge system

Info

Publication number: CN110379526A
Application number: CN201910500563.XA
Authority: CN
Inventors: 王远国; 张库国; 唐军; 荀明磊; 来毅强
Original assignee: China General Nuclear Power Corp; CGN Power Co Ltd; Daya Bay Nuclear Power Operations and Management Co Ltd; Lingdong Nuclear Power Co Ltd; Guangdong Nuclear Power Joint Venture Co Ltd; Lingao Nuclear Power Co Ltd
Current assignee: China General Nuclear Power Corp; CGN Power Co Ltd; Daya Bay Nuclear Power Operations and Management Co Ltd; Lingdong Nuclear Power Co Ltd; Guangdong Nuclear Power Joint Venture Co Ltd; Lingao Nuclear Power Co Ltd
Priority date: 2019-06-11
Filing date: 2019-06-11
Publication date: 2019-10-25
Anticipated expiration: 2039-06-11
Also published as: CN110379526B

Abstract

The invention belongs to nuclear power station million kilowatt nuclear power station primary Ioops auxiliary system technical fields, the present invention provides a kind of pressurized water reactor nuclear island container blowing methods, including the row's hydrogen purge system purged for pressurized water reactor nuclear island container, moisturizing is being carried out to pressure release case, during nitrogen purges, due to being equipped with check valve group on the second pipeline of connection nuclear island nitrogen supply system and pressure release case, reduce the back pressure in pressure release case, enable water charging system into pressure release case full of water, the space for accommodating hydrogeneous exhaust gas in pressure release case is all compressed and pressure release case is all discharged in hydrogeneous exhaust gas；Then, stop to the moisturizing of pressure release case and drains, up to the water level decreasing in pressure release case to ordinary water level, nuclear island nitrogen supply system supplements nitrogen into pressure release case by the second pipeline, by in pressure release case can supplied gas accommodating space quickly fill with, by all purging discharges of the hydrogeneous exhaust gas in pressure release case, the hydrogen content in pressure release case is set to be reduced to 0.5V/V% hereinafter, avoiding that the quick-fried risk of hydrogen occurs.

Description

Pressurized water reactor nuclear island container blowing method and row's hydrogen purge system

Technical field

It is more specifically to be related to one the invention belongs to million kilowatt nuclear power station primary Ioops auxiliary system technical field Kind pressurized water reactor nuclear island container blowing method and row's hydrogen purge system.

Background technique

The nuclear island of PWR nuclear power plant application, is the pressurized-water reactor in nuclear power plant reactor containment (nuclear island container) And the general designation of each system related with pressurized-water reactor, capital equipment system include pressurized-water reactor reactor core and peace The complete connected primary Ioops system (the reactor coolant circulatory system) of shell (nuclear island container) and support primary Ioops system are normally transported Row and guarantee pressurized-water reactor normal reaction and the secondary coolant circuit system (auxiliary system) that is arranged.Wherein, primary Ioops system master Wanting equipment includes pressure vessel, steam generator, main circulation pump, the stabilization for maintaining primary Ioops pressure and compensation water in cold conditions With it is hot when volume change cause the voltage-stablizer of pressure variety and pipeline for being separately connected each equipment.In order to tie up It holds the stabilization of primary Ioops pressure and guarantees the normal reaction of pressurized-water reactor, voltage-stablizer usually requires letting out for one low pressure of configuration Case is pressed, the lower part of pressure release case stores the water of certain water level, and the top of pressure release case is full of nitrogen, to prevent from arranging in voltage-stablizer circuit The oxygen mix put in the hydrogen and air contained into the steam of pressure release case generates detonation gas.

Pressurized-water reactor unit during normal operation, if the hydrogen content in release case is higher, there are generation hydrogen Quick-fried risk.Therefore, the hydrogen content in release case needs to control in the range of a safety: according to " chemistry and radiochemistry Technical specification " relevant criterion, the limit value of hydrogen and oxygen in pressure release case is less than 2.0V/V% (percent by volume), and desired value is small In 1.0V/V% (percent by volume), and standard is operated normally according to pressurized-water reactor unit, the hydrogen and oxygen in pressure release case Limit value is less than 0.5V/V% (percent by volume).Therefore, in order to solve the hydrogen content in release case it is higher and exist occur It the problem of hydrogen quick-fried risk, generallys use nuclear island nitrogen supply system and supplements nitrogen into release case in time, to the hydrogen in release case Gas carries out the method for purging discharge, and the hydrogen content in exclusion release case is higher and the quick-fried security risk of hydrogen may occur.

It is current main using the method for raising release case water level, release case liquid is raised by supplementing demineralized water into pressure release case Position, while nitrogen is supplemented to pressure release case by nuclear island nitrogen supply system, purging row's hydrogen is carried out to release case, by containing in pressure release case Hydrogen exhaust gas purging cements out.However, in purging row's hydrogen methods that release case water level cooperation supplement nitrogen is raised in existing utilization, Since release case causes back pressure in release case to increase in moisturizing, supplement nitrogen purging, cause the water in release case that cannot be full of Entire water tank causes the space of the hydrogeneous exhaust gas of accommodating in release case not compress cmpletely, it is difficult to will be hydrogeneous useless in release case Gas is completely exhausted out and the hydrogen content in release case can not be reduced to 0.5V/V% (percent by volume) hereinafter, causing in pressure release case Hydrogen content it is higher, be easy to cause the quick-fried security risk of hydrogen.

Summary of the invention

The purpose of the present invention is to provide a kind of pressurized water reactor nuclear island container blowing methods, to solve to deposit in the prior art Utilization raise release case water level cooperation supplement nitrogen purging row hydrogen methods in, due to release case moisturizing, supplement nitrogen It is easy to cause back pressure in release case to increase when purging, causes the water in release case that cannot cause in release case full of entire water tank It does not compress cmpletely in the space for accommodating hydrogeneous exhaust gas, it is difficult to the hydrogeneous exhaust gas in release case be completely exhausted out, pressure release case is caused In the higher problem of hydrogen content.

To achieve the above object, the technical solution adopted by the present invention is that providing a kind of pressurized water reactor nuclear island container purging side Method, this method include row's hydrogen purge system for pressurized water reactor nuclear island container purging, and row's hydrogen purge system includes using In the voltage-stablizer being connected with nuclear island container, the endless tube being connected to the voltage-stablizer, for collecting and condensing the voltage-stablizer discharge The pressure release case of vapor, the nuclear island nitrogen supply system for supplementing nitrogen and the row's of purging hydrogen into the pressure release case, described in connection Endless tube with the first pipeline of the pressure release case, the second pipeline for connecting the pressure release case and the nuclear island nitrogen supply system, for The water charging system of moisturizing in the pressure release case, for for the hydrogeneous exhaust gas discharge in the pressure release case exhaust emission system, In for pressure release case draining drainage system, the connection exhaust emission system and the third pipeline of the pressure release case, connect The water charging system and the 4th pipeline of the pressure release case, the 5th pipeline for connecting the drainage system and the pressure release case, with And the 6th pipeline of the endless tube and the exhaust emission system is connected, it is successively set on second pipeline along nitrogen flow direction It is equipped with for nitrogen pressure reducing valve and the check valve group at least one non-return valve, is provided with the first valve on the third pipeline, It is provided with the second valve on 4th pipeline, third valve is provided on the 5th pipeline, is arranged on the 6th pipeline There is the 4th valve, and the exhaust emission system has the exhaust isolating valve for controlling the exhaust emission system exhaust；Institute Pressurized water reactor nuclear island container blowing method is stated to comprise the following steps:

Troubleshooting: second pipeline, the plugging fault for nitrogen isolating valve and the check valve group are excluded；

Calculation of pressure: calculating opens minimum pressure △ p required for the check valve group₀；

Pressure debugging: adjusting is described for nitrogen pressure reducing valve, controls confession of the nuclear island nitrogen supply system into second pipeline Nitrogen pressure is p₀, and p₀Greater than △ p₀, so that the stream of nitrogen gas in second pipeline can open the check valve group and enter The check valve group downstream user；

Level pressure is for nitrogen: after closing the 4th valve, first valve and opening the exhaust isolating valve, then opening It opens and adjusts described for nitrogen pressure reducing valve, the nuclear island nitrogen supply system is made to be remained above or be equal to p₀Constant pressure p₁, by described Second pipeline continues to the check valve group downstream user for nitrogen；And second pipeline is transferred into check valve group downstream and is used Family is denoted as p for nitrogen pressure₂, i.e. p₂For p₁With △ p₀Difference；

It arranges hydrogen purging: opening second valve and the 4th valve, make the water charging system into the pressure release case Water is supplemented to raise the water level in the pressure release case, during the water level in the pressure release case is raised in the pressure release case Pressure p₃Rise, the hydrogeneous exhaust gas in the pressure release case is discharged by the exhaust emission system；And if only if the pressure release case Interior pressure p₃Less than p₂When, the nuclear island nitrogen supply system supplements nitrogen purging by second pipeline into the pressure release case Hydrogeneous exhaust gas；

Nitrogen supplement: until the water level in the pressure release case reaches the 100% of the pressure release case height with by the pressure release After hydrogeneous exhaust gas in case is all discharged, second valve, the exhaust isolating valve and the 4th valve are successively closed, then Opening the third valve makes the pressure release case to externally drained；It is described during water level in the pressure release case reduces Pressure p in pressure release case₄Decline, the pressure p in the pressure release case₄Less than p₂When, the nuclear island nitrogen supply system passes through Second pipeline supplements nitrogen into the pressure release case；Until the water level in the pressure release case is reduced to ordinary water level, close The third valve stops draining.

Preferably, this method further includes in the level pressure for the pressure check between nitrogen step and row's hydrogen purge step Step, the pressure check step comprise the following steps: opening is set on second pipeline and is located at the check valve group With the switch valve between nitrogen pressure reducing valve, observation is set on second pipeline and is located at the switch valve and institute respectively The pressure change for the first pressure gauge between nitrogen pressure reducing valve is stated, while observation is set on second pipeline and is located at described The pressure change of the second pressure gauge in check valve group downstream: slowly rise again after the pressure value of the first pressure gauge is in decline To p₀, and the pressure value of the second pressure gauge is raised slowly to p from 0₂When, institute can be passed through with the determination nuclear island nitrogen supply system It states the second pipeline and supplements nitrogen purging into the pressure release case, and the nuclear island nitrogen supply system transfers to institute by second pipeline Stating the nitrogen pressure in pressure release case is p₂。

Preferably, in the calculation of pressure step, the check valve group includes the first non-return valve and the second non-return valve, institute It states the first non-return valve and second non-return valve is set in turn on second pipeline along nitrogen flow direction.

Preferably, in the calculation of pressure step, minimum pressure △ p required for first non-return valve is opened₁With Open minimum pressure △ p required for the second non-return valve₂It is not identical, and △ p₁With △ p₂The sum of be △ p₀。

Preferably, minimum pressure △ p required for first non-return valve is opened₁Greater than opening the second non-return valve institute The minimum pressure △ p needed₂。

Preferably, the control of pressure limit required for first non-return valve is opened in 0.005MPa~0.006MPa.

Preferably, it calculates to obtain and opens minimum pressure △ p required for first non-return valve₁For 0.005MPa.

Preferably, the control of pressure limit required for second non-return valve is opened in 0.004~0.005MPa.

Preferably, it calculates to obtain and opens minimum pressure △ p required for second non-return valve₂For 0.004MPa.

Preferably, in the level pressure in nitrogen step, the nuclear island nitrogen supply system exists for the control of nitrogen pressure limit 0.03MPa~0.05MPa.

Preferably, in the level pressure for being adjusted by the decompression for nitrogen pressure reducing valve, by the nuclear island in nitrogen step Nitrogen supply system is adjusted to constant pressure for nitrogen pressure, and makes the constant for nitrogen pressure p of the nuclear island nitrogen supply system₁For 0.025MPa。

Preferably, the pressure p in row's hydrogen purge step, in the pressure release case₃No more than 0.05MPa.

Preferably, in row's hydrogen purge step, the water charging system is the make-up system of reactor boron and water, described The make-up system of reactor boron and water supplements the demineralized water by removing salt treatment into the pressure release case.

Preferably, the pressure p in nitrogen supplement step, in the pressure release case₄No more than 0.05MPa.

Preferably, described to let out when the water level in the pressure release case is reduced to ordinary water level in nitrogen supplement step Water level in pressure case reaches the pressure release case altitude range is 60%~70%.

Preferably, in nitrogen supplement step, the water level in the pressure release case reaches the pressure release case height 65%, stop draining to confirm that the water level in the pressure release case is reduced to ordinary water level and closes the third valve.

Preferably, first valve is the outlet isolating valve for controlling the pressure release case port opening or closing.

Preferably, second valve is to be isolated for controlling the moisturizing of water charging system moisturizing into the pressure release case Valve.

Preferably, the third valve is for controlling the drainage system for the draining of the water discharge in the pressure release case Isolating valve.

Preferably, the 4th valve is to be connected to the exhaust emission system or not connected state for controlling the endless tube The endless tube isolating valve of state.

Preferably, it is additionally provided on second pipeline for controlling the nuclear island nitrogen supply system to the pressure release case for nitrogen Manual isolation valve, and the manual isolation valve is located at the downstream of the check valve group.

Preferably, row's hydrogen purge system further includes for taking containing hydrogen and nitrogen gas to the aggregation in the pressure release case The sampling system of sample analysis, the sampling system are connected with the third pipeline.

Preferably, row's hydrogen purge system further includes hydrogeneous or oxygen-containing useless for handling the radioactivity in the pressure release case The exhaust treatment system of gas, the exhaust treatment system are connected with the third pipeline.

Preferably, the exhaust emission system is nuclear island exhaust and draining system.

Preferably, in row's hydrogen purge step or nitrogen supplement step, the normal pressure model of the pressure release case It encloses for 0.02MPa~0.035MPa.

Preferably, the rated pressure of the pressure release case is 0.02MPa.

Preferably, row's hydrogen purge system further includes the pressure-detecting device for detecting pressure in the pressure release case.

Preferably, row's hydrogen purge system further includes the warning device being electrical connected with the pressure-detecting device, when When the pressure-detecting device detects that the pressure in the pressure release case is more than 0.05MPa, the warning device issues alarm signal Number.

The object of the invention is also to provide it is a kind of for pressurized water reactor nuclear island container purging row's hydrogen purge system, with It solves utilization existing in the prior art to raise in purging row's hydrogen methods of release case water level cooperation supplement nitrogen, due to release case It is easy to cause back pressure in release case to increase in moisturizing, supplement nitrogen purging, causes the water in release case that cannot be full of entire water Case causes the space of the hydrogeneous exhaust gas of accommodating in release case not compress cmpletely, it is difficult to which the hydrogeneous exhaust gas in release case is complete Discharge, the problem for causing the hydrogen content in pressure release case higher.

To achieve the above object, it is blown the technical solution adopted by the present invention is that providing one kind for pressurized water reactor nuclear island container The row's hydrogen purge system swept, row's hydrogen purge system include voltage-stablizer and the voltage-stablizer for being connected with nuclear island container The endless tube of connection, the pressure release case of vapor for collecting and condensing voltage-stablizer discharge, for being mended into the pressure release case The nuclear island nitrogen supply system of inflated with nitrogen, the connection endless tube and the first pipeline of the pressure release case, connect the pressure release case with institute State nuclear island nitrogen supply system the second pipeline, for into the pressure release case water charging system of moisturizing, for in the pressure release case The discharge of hydrogeneous vapor exhaust emission system, the drainage system for for pressure release case draining, connection exhaust gas row Place system with described in the third pipeline of the pressure release case, the 4th pipeline for connecting the water charging system and the pressure release case, connection Drainage system is with the 5th pipeline of the pressure release case and connect the 6th pipeline of the endless tube Yu the exhaust emission system, It is disposed with along nitrogen flow direction for nitrogen pressure reducing valve and with the check of at least one non-return valve on second pipeline Valve group is provided with the first valve on the third pipeline, is provided with the second valve on the 4th pipeline, on the 5th pipeline It is provided with third valve, the 4th valve is provided on the 6th pipeline, and the exhaust emission system has for controlling State the exhaust isolating valve of pressure release case exhaust.

Preferably, row's hydrogen purge system further includes supplying for controlling second pipeline to check valve group downstream The switch valve of nitrogen and for detect and show check valve group upstream for the first pressure gauge of nitrogen pressure, the switch valve setting In on second pipeline and being located at the check valve group and described between nitrogen pressure reducing valve, the first pressure gauge is set to institute State on the second pipeline and be located at the switch valve and described between nitrogen pressure reducing valve.

Preferably, the check valve group includes the first non-return valve and the second non-return valve, first non-return valve and described the Two non-return valves are set in turn on second pipeline along nitrogen flow direction.

Preferably, first non-return valve is lift non-return valve.

Preferably, second non-return valve is lift non-return valve.

A kind of pressurized water reactor nuclear island container blowing method provided by the invention and the beneficial effect for arranging hydrogen purge system exist In: compared with prior art, a kind of pressurized water reactor nuclear island container blowing method provided by the invention, including for pressing water to react Row's hydrogen purge system of heap nuclear island container purging, row's hydrogen purge system include voltage-stablizer for being connected with nuclear island container, with surely Depressor connection endless tube, for collect and condense voltage-stablizer discharge vapor pressure release case, for supplementing nitrogen into pressure release case Nuclear island nitrogen supply system that air-blowing is swept, connection endless tube and the first pipeline of pressure release case, connect pressure release case and nuclear island nitrogen supply system the Two pipelines, for into pressure release case the water charging system of moisturizing, for in pressure release case hydrogeneous exhaust gas discharge exhaust gas discharge system System, connection exhaust emission system and the third pipeline of pressure release case, connect water charging system at the drainage system for draining for pressure release case With the 4th pipeline of pressure release case, connect drainage system and the 5th pipeline of pressure release case and connect endless tube and exhaust emission system The 6th pipeline, be disposed with for nitrogen pressure reducing valve along nitrogen flow direction and there is at least one check on the second pipeline The check valve group of valve is provided with the first valve on third pipeline, the second valve is provided on the 4th pipeline, is arranged on the 5th pipeline There is third valve, the 4th valve is provided on the 6th pipeline, and exhaust emission system has for controlling exhaust emission system row The exhaust isolating valve of gas.During carrying out moisturizing, supplement nitrogen purging to pressure release case, due in connection nuclear island nitrogen supply system It is equipped with check valve group with the second pipeline of pressure release case, the back pressure in pressure release case is reduced, enables water charging system to pressure release case Middle moisturizing to entire pressure release case is full of water, the space almost all compression of hydrogeneous exhaust gas will be accommodated in pressure release case and by hydrogeneous exhaust gas All discharge pressure release casees；Then, pressure release case is drained again after stopping moisturizing to pressure release case, until under the water level in pressure release case It is down to ordinary water level, while the water level in pressure release case reduces, nuclear island nitrogen supply system is mended by the second pipeline into pressure release case Inflated with nitrogen, by constantly increase in pressure release case can supplied gas accommodating space quickly fill with, to reach containing in pressure release case The hydrogen exhaust gas purpose that all purging displacement is discharged makes the hydrogen content in pressure release case be down to 0.5V/V% hereinafter, avoiding generation hydrogen quick-fried Risk.Also, during carrying out moisturizing purging to pressure release case: when the water level in pressure release case is raised, and if only if letting out Press the pressure in case be less than check valve group downstream for nitrogen pressure when, nuclear island nitrogen supply system could be by the second pipeline to pressure release case Interior supplement nitrogen purges hydrogeneous exhaust gas, the hydrogeneous exhaust gas purging in pressure release case is cemented out, thus rapidly by pressure release case Interior hydrogen content reduces；And when the pressure in pressure release case be greater than or equal to check valve group downstream for nitrogen pressure when, nuclear island is for nitrogen Stream of nitrogen gas cannot be supplemented in the pressure release case in check valve group downstream by system by the second pipeline, effectively prevented pressure release case and existed It builds the pressure during the hydrogeneous exhaust gas discharge of moisturizing booster compression, the back pressure for causing hydrogeneous exhaust gas to be discharged in unsmooth and pressure release case is larger The danger of pressure release case explosion even occurs.

Detailed description of the invention

It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these Attached drawing obtains other attached drawings.

Fig. 1 is the structural representation of the purge system provided in an embodiment of the present invention for pressurized water reactor nuclear island container purging Figure.

Wherein, each attached drawing main mark in figure:

1- voltage-stablizer；2- endless tube；3- pressure release case；4- nuclear island nitrogen supply system；The first pipeline of 5-；The second pipeline of 6-；7- moisturizing System；8- exhaust emission system；9- drainage system；10- third pipeline；The 4th pipeline of 11-；The 5th pipeline of 12-；13- the 6th is managed Line；14- is for nitrogen pressure reducing valve；The first valve of 15-；The second valve of 16-；17- third valve；The 4th valve of 18-；19- exhaust isolation Valve；20- switch valve；21- first pressure gauge；22- second pressure gauge；23- manual isolation valve；24- sampling system；At 25- exhaust gas Reason system；100- check valve group；The first non-return valve of 101-；The second non-return valve of 102-.

Specific embodiment

In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, tie below Accompanying drawings and embodiments are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only To explain the present invention, it is not intended to limit the present invention.

It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element On one element or indirectly on another element.When an element is known as " being connected to " another element, it can To be directly to another element or be indirectly connected on another element.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more, Unless otherwise specifically defined." several " are meant that one or more, unless otherwise specifically defined.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary The interaction relationship of connection or two elements inside two elements.It for the ordinary skill in the art, can be with The concrete meaning of above-mentioned term in the present invention is understood as the case may be.

Referring to Fig. 1, existing be illustrated a kind of pressurized water reactor nuclear island container blowing method provided by the invention.This hair A kind of pressurized water reactor nuclear island container blowing method of bright offer, this method include purging for pressurized water reactor nuclear island container Hydrogen purge system is arranged, row's hydrogen purge system includes voltage-stablizer 1 for being connected with nuclear island container, the endless tube being connected to voltage-stablizer 1 2, the pressure release case 3 for collecting and condensing the vapor of the discharge of voltage-stablizer 1, the core for supplementing nitrogen purging into pressure release case 3 Island nitrogen supply system 4 connects endless tube 2 and the first pipeline 5 of pressure release case 3, the second pipe for connecting pressure release case 3 with nuclear island nitrogen supply system 4 Line 6 discharges system for the water charging system 7 of the moisturizing into pressure release case 3, the exhaust gas for being discharged for the hydrogeneous exhaust gas in pressure release case 3 System 8, connects exhaust emission system 8 and the third pipeline 10 of pressure release case 3, connect the drainage system 9 for drain for pressure release case 3 Water charging system 7 with the 4th pipeline 11 of pressure release case 3, connect the 5th pipeline 12 and connection ring of drainage system 9 Yu pressure release case 3 6th pipeline 13 of pipe 2 and exhaust emission system 8 is disposed with for nitrogen pressure reducing valve on second pipeline 6 along nitrogen flow direction 14 and the check valve group 100 at least one non-return valve, the first valve 15, the 4th pipeline are provided on third pipeline 10 It is provided with the second valve 16 on 11, third valve 17 is provided on the 5th pipeline 12, is provided with the 4th valve on the 6th pipeline 13 18, and exhaust emission system 8 has the exhaust isolating valve 19 for controlling the exhaust of exhaust emission system 8；

Pressurized water reactor nuclear island container blowing method includes at least following steps:

Troubleshooting: the first pipeline 5, the second pipeline 6, third pipeline 10, the 4th pipeline 11, the 5th pipeline 12 or the are excluded The plugging fault for the valve installed on six pipelines 13 and each pipeline, to guarantee being normally carried out for nitrogen purging row's hydrogen.

Calculation of pressure: calculating opens minimum pressure △ p0 required for the check valve group 100 being set on the second pipeline 6, To adjust for nitrogen pressure reducing valve 14, make the second pipeline 6 be supplied to 100 downstream user of check valve group (pressure release case 3) for nitrogen pressure In safe pressure range, the security reliability when work of hydrogen purge system is arranged in guarantee, avoids causing pipeline for nitrogen pressure is excessive Build the pressure even explosion danger.

Pressure debugging: adjust be set on the second pipeline 6 for nitrogen pressure reducing valve 14, control nuclear island nitrogen supply system 4 to second In pipeline 6 is p for nitrogen pressure₀, and guarantee p₀Greater than △ p₀, so that the stream of nitrogen gas in the second pipeline 6 can open non-return valve Group 100 simultaneously enters 100 downstream user of non-return valve group (pressure release case 3), and the row's of guarantee hydrogen purge system can be normally in pressure release case 3 Hydrogeneous exhaust gas purged, improve purging row hydrogen efficiency and purging row hydrogen effect.

Level pressure is for nitrogen: in for closing the 4th valve 18 being set on the 6th pipeline 13 and being set on third pipeline 10 One valve 15 and open exhaust emission system 8 exhaust isolating valve 19 after, be then turned on and adjust on the second pipeline 6 for nitrogen Pressure reducing valve 14 makes nuclear island nitrogen supply system 4 be remained above or be equal to p₀Constant pressure p₁, by the second pipeline 6 to check valve group 100 downstream users (pressure release case 3) continue for nitrogen, so that row's hydrogen purge system can carry out surely the hydrogeneous exhaust gas in pressure release case 3 It is fixed efficiently to purge.Meanwhile and the second pipeline 6 is transferred into being denoted as nitrogen pressure for 100 downstream user of check valve group (pressure release case 3) p₂, i.e. p₂For p₁With △ p₀Difference.That is, adjusting steady state value p for nitrogen pressure when nuclear island nitrogen supply system 4₂When, due to opening Check valve group 100 on second pipeline 6 consumes partial pressure △ p₀, in the feelings that the stream of nitrogen gas of the second pipeline 6 normally circulates Under condition, the maximum back pressure that 100 downstream user of check valve group (pressure release case 3) allows is p2.When 100 downstream user of check valve group (is let out Press case 3) back pressure be more than or equal to p₂When, the stream of nitrogen gas in the second pipeline 6 will not can enter 100 downstream of non-return valve group use Family (pressure release case 3)；When the back pressure of 100 downstream user of check valve group (pressure release case 3) is less than p₂When, the nitrogen gas in the second pipeline 6 Stream could be automatically into 100 downstream user of check valve group (pressure release case 3).Therefore, because check valve group 100 on the second pipeline 6 Setting, make 100 downstream user of check valve group (pressure release case 3) back pressure be less than nuclear island nitrogen supply system 4 for nitrogen pressure, thus greatly Amplitude reduces the back pressure of 100 downstream user of check valve group (pressure release case 3), to significantly reduce 100 downstream of check valve group User's (pressure release case 3) generates the risk to build the pressure because back pressure is excessive.

Row hydrogen purging: open be set on the 4th pipeline 11 second valve 16 and be set on the 6th pipeline 13 the 4th Valve 18, the water level lift for making water charging system 7 supplement water into pressure release case 3 to raise the water level in pressure release case 3, in pressure release case 3 In high process, in pressure release case 3 can the space of supplied gas accommodating constantly reduce, the p therewith of the pressure in pressure release case 3₃Rise, pressure release Hydrogeneous exhaust gas in case 3 is discharged by exhaust emission system 8；Also, during the water level in pressure release case 3 is raised, when and Only when the pressure p in pressure release case 3₃Less than p₂When, nuclear island nitrogen supply system 4 supplements nitrogen into pressure release case 3 by the second pipeline 6 and blows Hydrogeneous exhaust gas is swept, the hydrogeneous exhaust gas purging in pressure release case 3 is cemented out, thus rapidly by the hydrogen content in pressure release case 3 It reduces；And when the pressure p in pressure release case 3₃More than or equal to p₂When, the stream of nitrogen gas in the second pipeline 6 will not can enter check The pressure release case 3 in 100 downstream of valve group is made so that pressure release case 3 be avoided to generate greater back-pressure during hydrogeneous exhaust gas is discharged in moisturizing Build the pressure at pipeline and pressure release case occur explosion danger, improve for nitrogen purging security reliability.

Nitrogen supplement: until the water level in pressure release case 3 reaches the 100% of 3 height of pressure release case, sufficiently to compress pressure release case 3 It is interior can supplied gas accommodating space, realize by pressure release case 3 hydrogeneous exhaust gas almost all be discharged pressure release case 3.Secondly, successively closing Close the 4th valve on the exhaust isolating valve 19 and the 6th pipeline 13 of the second valve 16 on the 4th pipeline 11, exhaust emission system 8 Door 18, the third valve 17 being then turned on the 5th pipeline 12 makes pressure release case 3 to externally drained to reduce water level；In pressure release case 3 Water level reduce during, in pressure release case 3 can supplied gas accommodating space constantly increase, the pressure p in pressure release case 3₄Therewith Decline, the pressure p in pressure release case 3₄Less than p₂When, nuclear island nitrogen supply system 4 is automatically by the second pipeline 6 to pressure release case 3 Interior supplement nitrogen, and by press constantly increase in case can the space of supplied gas accommodating quickly fill with, it is high to be carried out to hydrogeneous exhaust gas Effect purging displacement；Until the water level in pressure release case 3 is reduced to ordinary water level, closes third valve 17 and stop draining；At this point, pressure release The upper space of case 3 refills the nitrogen supplied by nuclear island nitrogen supply system 4, and the hydrogeneous exhaust gas almost all in pressure release case 3 Pressure release case 3 is discharged, to reach the hydrogeneous exhaust gas in pressure release case 3 through moisturizing, draining in such a way that inflated with nitrogen purging combines, Hydrogeneous exhaust gas in pressure release case 3 is almost all replaced to the purpose of discharge, so that the hydrogen content in pressure release case 3 be made to be down to 0.5V/ V% or less.

A kind of pressurized water reactor nuclear island container blowing method provided by the invention, compared with prior art, including for pressing Row's hydrogen purge system of water reactor nuclear island container purging, row's hydrogen purge system include the voltage-stablizer for being connected with nuclear island container 1, the endless tube 2 being connected to voltage-stablizer 1, is used for pressure release the pressure release case 3 for collecting and condensing the vapor that voltage-stablizer 1 discharges The nuclear island nitrogen supply system 4 of nitrogen purging, connection endless tube 2 and the first pipeline 5 of pressure release case 3 are supplemented in case 3, connect pressure release case 3 and Second pipeline 6 of nuclear island nitrogen supply system 4, for the water charging system 7 of the moisturizing into pressure release case 3, for for hydrogeneous in pressure release case 3 Exhaust emission system 8, the drainage system 9 for being drained for pressure release case 3, connection exhaust emission system 8 and the pressure release of exhaust gas discharge The third pipeline 10 of case 3, connection water charging system 7 and the 4th pipeline 11 of pressure release case 3, connect drainage system 9 and pressure release case 3 the Five pipelines 12 and the 6th pipeline 13 for connecting endless tube 2 and exhaust emission system 8, on the second pipeline 6 along nitrogen flow direction according to It is secondary to be provided with for nitrogen pressure reducing valve 14 and the check valve group 100 at least one non-return valve, is provided on third pipeline 10 One valve 15 is provided with the second valve 16 on the 4th pipeline 11, third valve 17, the 6th pipeline 13 is provided on the 5th pipeline 12 On be provided with the 4th valve 18, and exhaust emission system 8 has the exhaust isolating valve for controlling the exhaust of exhaust emission system 8 19.During carrying out moisturizing, supplement nitrogen purging to pressure release case 3, due in connection nuclear island nitrogen supply system 4 and pressure release case 3 The second pipeline 6 be equipped with check valve group 100, reduce the back pressure in pressure release case 3, enable water charging system 7 into pressure release case 3 Moisturizing to entire pressure release case 3 be full of water, will be accommodated in pressure release case 3 hydrogeneous exhaust gas space almost all squeeze compression and will be hydrogeneous Pressure release case 3 is all discharged in exhaust gas；Then, moisturizing is stopped to pressure release case 3 and drained, until the water level decreasing in pressure release case 3 To ordinary water level, while the water level in pressure release case 3 reduces, nuclear island nitrogen supply system 4 is by the second pipeline 6 into pressure release case 3 Supplement nitrogen, by constantly increase in pressure release case 3 can supplied gas accommodating space quickly fill with, will be in pressure release case 3 to reach Hydrogeneous exhaust gas all purging displacement discharge purposes, so that the hydrogen content in pressure release case 3 is down to 0.5V/V% hereinafter, avoiding occurring The quick-fried risk of hydrogen.Also, to pressure release case 3 carry out moisturizing purging during: when the water level in pressure release case 3 is raised, when and Only when the pressure in pressure release case 3 be less than 100 downstream of check valve group for nitrogen pressure when, nuclear island nitrogen supply system 4 could pass through second Pipeline 6 supplements nitrogen into pressure release case 3 and purges hydrogeneous exhaust gas, and the hydrogeneous exhaust gas purging in pressure release case 3 is cemented out, thus Rapidly the hydrogen content in pressure release case 3 is reduced；And when the pressure in pressure release case 3 is greater than or equal to 100 downstream of check valve group When for nitrogen pressure, stream of nitrogen gas cannot be supplemented to letting out for 100 downstream of check valve group by the second pipeline 6 by nuclear island nitrogen supply system 4 It presses in case 3, effectively prevents pressure release case 3 and build the pressure during the hydrogeneous exhaust gas discharge of moisturizing booster compression, cause hydrogeneous exhaust gas The back pressure being discharged in unsmooth and pressure release case 3 is larger or even the danger of 3 explosion of pressure release case occurs.

Preferably, this method further includes in level pressure for the pressure check step between nitrogen step and row's hydrogen purge step, pressure Force inspecting step comprises the following steps: opening be set on the second pipeline 6 and be located at check valve group 100 with for nitrogen pressure reducing valve 14 it Between switch valve 20, observation is set on the second pipeline 6 and is located at switch valve 20 and for first between nitrogen pressure reducing valve 14 respectively The pressure change of pressure gauge 21, while observation is set to the second pressure gauge on the second pipeline 6 and being located at 100 downstream of check valve group 22 pressure change: it is raised slowly to p again after the pressure value of first pressure gauge 21 is in decline₀, and the pressure of second pressure gauge 22 Force value is raised slowly to p from 0₂When, it is blown with determining that nuclear island nitrogen supply system 4 can supplement nitrogen by the second pipeline 6 into pressure release case 3 It sweeps, and it is p that nuclear island nitrogen supply system 4, which transfers to the nitrogen pressure in pressure release case 3 by the second pipeline 6,₂.Pressure check step is to examine 100 downstream pressure of check valve group, convenient for for nitrogen pressure reducing valve 14 with reference to and in time accurately adjust nuclear island nitrogen supply system 4 for nitrogen pressure Power, the △ p for avoiding calculation of pressure step from being calculated₀It is larger with actual pressure consumption error, cause 100 downstream of check valve group to press Power is excessively high or too low, influences nitrogen to the purging effect of pressure release case 3 and purging efficiency.

Preferably, in calculation of pressure step, check valve group 100 includes the first non-return valve 101 and the second non-return valve 102, First non-return valve 101 and the second non-return valve 102 are set in turn on the second pipeline 6 along nitrogen flow direction.It is set in the second pipeline 6 Two non-return valves are set, are on the one hand arranged using redundancy, it still can be by addition in the case where a wherein check defective valve One non-return valve guarantees that normal nitrogen purges work, will not influence purging row hydrogen work of the nitrogen to pressure release case 3；Another party Face, the non-return valve being arranged in series using two can play the buffering effect for reducing pressure step by step, instantaneous pressure avoided to cause by force It is strong impact and damage non-return valve, to ensure reliability and safety of second pipeline 6 for nitrogen.

Preferably, the first non-return valve 101, which uses, is easy to flow automatic open and close flap (spool) by gas medium itself Lift non-return valve, the second non-return valve 102 is using being easy to flow automatic open and close flap (spool) by gas medium itself Lift non-return valve.

Specifically, in calculation of pressure step, minimum pressure △ p required for the first non-return valve 101 is opened₁With open Minimum pressure △ p required for two non-return valves 102₂It is not identical, and △ p₁With △ p₂The sum of be △ p₀, to improve the second pipeline 6 For nitrogen reliability and safety.

Specifically, minimum pressure △ p required for the first non-return valve 101 is opened₁Greater than opening needed for the second non-return valve 102 The minimum pressure △ p wanted₂, the effect gradually decreased for nitrogen pressure is better achieved, the second pipeline 6 is further increased for nitrogen Reliability and safety.

In row's hydrogen purge system real work operational process, minimum pressure △ required for the first non-return valve 101 is opened p₁Range be 0.005MPa~0.006MPa, in order to which nuclear island nitrogen supply system 4 keeps the low pressure of safety and stability for nitrogen, reduce pressure Power loss, and can preferably reduce the back pressure for being located at 101 downstream user of the first non-return valve on the second pipeline 6.

Preferably, minimum pressure values △ p required for the first non-return valve 101 is opened₁For 0.005MPa.

In row's hydrogen purge system real work operational process, minimum pressure △ required for the second non-return valve 102 is opened p₁Range be 0.004MPa~0.005MPa, in order to which nuclear island nitrogen supply system 4 keeps the low pressure of safety and stability for nitrogen, reduce pressure Power loss, and can preferably reduce the back pressure for being located at 102 downstream user of the second non-return valve on the second pipeline 6.

Preferably, minimum pressure values △ p required for the second non-return valve 102 is opened₂For 0.004MPa.

Row hydrogen purge system real work operational process in, due to for nitrogen source nuclear island nitrogen supply system 4 for nitrogen pressure not It is invariable, but fluctuating change by a small margin occurs with the difference of the operating condition of nuclear island system, therefore pass through Stable regulation is carried out for pressure of the nitrogen pressure reducing valve 14 to nuclear island nitrogen supply system 4 on second pipeline 6, so that nuclear island nitrogen supply system 4 Stablized by the second pipeline 6 and safely supplements nitrogen purging to pressure release case 3, it is constant for nitrogen pressure p₁Range be 0.03MPa ~0.05MPa.

Preferably, in level pressure for being adjusted by the decompression for nitrogen pressure reducing valve, by the nuclear island for nitrogen in nitrogen step System is adjusted to constant pressure for nitrogen pressure, and makes the constant for nitrogen pressure p of nuclear island nitrogen supply system 4₁For 0.025MPa, with Under the premise of nitrogen purging capable of steadily being supplemented into pressure release case 3, make back pressure in the second pipeline 6 and pressure release case 3 as far as possible Small (be no more than 0.025MPa), and limiting pressure of explosion occurs much smaller than its, thus effective guarantee the second pipeline 6 and pressure release The safety of case 3.

Preferably, the pressure p in row's hydrogen purge step, in pressure release case 3₃No more than 0.05MPa, to avoid pressure release case 3 Interior generation high pressure explosion and safety accident occurs.

Specifically, row hydrogen purge step in, water charging system 7 be reactor boron and water make-up system, reactor boron and The make-up system of water supplemented into pressure release case 3 through removing salt treatment demineralized water, to avoid influence pressure release case 3 normal work and The normal reaction of nuclear island reactor.

Preferably, the pressure p in pressure release case 3₄No more than 0.05MPa, sent out to avoid high pressure explosion occurs in pressure release case 3 Raw safety accident.

Specifically, minimum pressure values △ p required for the first non-return valve 101 is opened₁With open needed for the second non-return valve 102 The minimum pressure values △ p wanted₂Calculating process it is as follows:

Parameter measurement is carried out to the first non-return valve 101 and the second non-return valve 102, measure the first non-return valve 101 of acquisition with The relevant parameter of second non-return valve 102, specific as follows:

Measure first non-return valve 101 (RAZ034VZ) data: the weight m of the first spool₁=0.8069Kg, the first valve seat set The outer diameter D of cylinder₁=58mm, the internal diameter d of the first valve sleeve₁=45mm, the frictional force between the first spool and the first valve sleeve For f₁, spool Impact direction is downward.

Measure second non-return valve 102 (RAZ033VZ) data: the weight m of the second spool₂=0.1015Kg, the second valve seat set The outer diameter D of cylinder₂=27mm, the internal diameter d of the second valve sleeve₂=18mm, the frictional force between the second spool and the second valve sleeve For f₂, spool Impact direction is downward.

A is the forced area of valve, A=π × (d/2)², g is acceleration of gravity.Because valve lower part forced area is than upper Portion's forced area is small, for conservative consideration, is calculated with lower part forced area, ignores the frictional force between spool top and sleeve f₁And f₂, and back pressure is designed as 0MPa (atmospheric pressure), calculate the minimum pressure values for just jacking up spool to come.

Open the minimum pressure values of the first non-return valve 101 (RAZ034VZ): △ p₁×A₁=m₁×g+f₁, then △ p1 ≈ 0.005MPa；

The minimum pressure values of the second non-return valve 102 (RAZ033VZ): △ p2 × A2=m2 × g+f2 are opened, then △ p₂≈ 0.004MPa；

So while the first non-return valve 101 with the spool for opening the second non-return valve 102 at least need about △ p₁+△p₂= The pressure difference of 0.009MPa.

In row's hydrogen purge system real work operational process, influenced by supplement stream of nitrogen gas or air pressure, pressure release case 3 The interior water surface can also generate faint fluctuating change, it is generally recognized that the water level in pressure release case 3 reaches the 60~70% of 3 height of pressure release case The as nuclear island system ordinary water level that is able to maintain normal work.That is, the water level in pressure release case 3 is reduced to normal water When position, the water level in pressure release case reaches pressure release case altitude range is 60%~70% i.e. it is believed that water level is normal.

Preferably due to which the water level in pressure release case 3 reaches the 65% of 3 height of pressure release case, row's hydrogen effect is best, to avoid letting out It presses the hydrogen content in case 3 higher (being greater than 0.5V/V%) and generates the danger exploded.Therefore, in nitrogen supplement step, pressure release Water level in case reaches the 65% of the pressure release case height, to confirm that the water level in the pressure release case is reduced to ordinary water level and closes It closes the third valve and stops draining.

Specifically, the first valve 15 is the outlet isolating valve for controlling 3 port opening of pressure release case or closing, with convenient Pressure release case 3 is controlled to export.

Specifically, the second valve 16 is the moisturizing isolating valve for controlling the moisturizing into pressure release case 3 of water charging system 7, with side Just control water charging system 7 supplements water into pressure release case 3.

Specifically, third valve 17 is the draining isolating valve that the water in pressure release case 3 is discharged for controlling drainage system 9, The water in pressure release case 3 is rapidly discharged in time with facilitating.

Specifically, the 4th valve 18 is to be connected to exhaust emission system 8 or the endless tube of disconnected state for controlling endless tube 2 2 isolating valves, to facilitate control endless tube 2 to be connected to exhaust emission system 8 or disconnected state, the switching control of two kinds of working conditions It works well.

Specifically, exhaust emission system 8 is nuclear island exhaust and draining system, in the premise for not increasing extra means equipment Under, the hydrogeneous exhaust gas of nitrogen purging is discharged.

Preferably, the manual isolation for controlling nuclear island nitrogen supply system 4 to pressure release case 3 for nitrogen is additionally provided on the second pipeline 6 Valve 23, manual isolation valve 23 are located at the downstream of check valve group 100, to facilitate control control nuclear island nitrogen supply system 4 to supply pressure release case 3 Nitrogen purging, and ensure pressure release case 3 for the safety of nitrogen purge.

Preferably, row's hydrogen purge system further includes for being sampled analysis containing hydrogen and nitrogen gas to the aggregation in pressure release case 3 Sampling system 24, sampling system 24 is connected with third pipeline 10.By sampling system 24 to the gas assembled in pressure release case 3 into Row regular sampling analysis analyzes the hydrogen and oxygen concentration of 3 cohesion collection gas of pressure release case, so as in time to containing in pressure release case 3 Hydrogen is purged, and is avoided the hydrogen content in the hydrogen-containing gas assembled in pressure release case 3 higher (being greater than 0.5V/V%) and is generated The danger of explosion.

Preferably, row's hydrogen purge system further include for handle that the radioactivity in pressure release case 3 is hydrogeneous or oxygen-containing exhaust gas it is useless Gas processing system 25, exhaust treatment system 25 are connected with third pipeline 10.By exhaust treatment system 25 to radioactive Hydrogeneous or oxygen-containing exhaust gas discharges again after being handled, and avoids radioactive pollutant from being discharged into environment with gas, causes ring Border pollution and human injury.

Specifically, in row's hydrogen purge step or nitrogen supplement step, the normal pressure model of the pressure release case It encloses for 0.02MPa~0.035MPa

Specifically, the rated pressure of pressure release case 3 is 0.02MPa, to guarantee that pressure release case 3 works in a low voltage state as far as possible.

Preferably, row's hydrogen purge system further includes (not showing in figure for detecting the pressure-detecting device of pressure in pressure release case 3 Out), pressure detecting is carried out to the pressure release case 3 in pressure water purge, to understand in time by pressure-detecting device 3 pressure changing of pressure release case.When the pressure in pressure release case 3 occurs excessive, to take corresponding measure in time, such as to letting out During pressing case 3 to supplement water, when detecting that the pressure in release case is more than 0.05MPa, on the 4th pipeline 11 of temporary close Second valve 16 (moisturizing isolating valve) stops water-filling, waits continuation water-filling after the pressure reduction to normal pressure in pressure release case 3 straight Full-water level, so that the pressure water of effective guarantee pressure release case 3 purges volume safety.

Preferably, row's hydrogen purge system further includes that the warning device being electrical connected with pressure-detecting device (does not show in figure Out), when pressure-detecting device detects the pressure p 5 in pressure release case 3 more than 0.05MPa, warning device issues high pressure alarm Signal is known in time so as to staff and is made rapidly corresponding solution, avoids situation of causing danger.

Referring to Fig. 1, the present invention also provides a kind of row's hydrogen purge system for pressurized water reactor nuclear island container purging, Row's hydrogen purge system includes voltage-stablizer 1 for being connected with nuclear island container, is connected to voltage-stablizer 1 endless tube 2 is used for collection and cold The pressure release case 3 for the vapor that solidifying voltage-stablizer 1 discharges, the nuclear island nitrogen supply system 4 for supplementing nitrogen into pressure release case 3, connection ring Pipe 2 and the first pipeline 5 of pressure release case 3, connect pressure release case 3 with the second pipeline 6 of nuclear island nitrogen supply system 4, for pressure release case 3 The water charging system 7 of middle moisturizing, is used for for pressure release case the exhaust emission system 8 for being discharged for the hydrogeneous vapor in pressure release case 3 The drainage system 9 of 3 drainings, connect water charging system 7 and pressure release case at connection exhaust emission system 8 and the third pipeline 10 of pressure release case 3 3 the 4th pipeline 11, connection drainage system 9 and the 5th pipeline 12 of pressure release case 3 and it connect endless tube 2 and exhaust emission system 8 The 6th pipeline 13, be disposed with for nitrogen pressure reducing valve 14 along nitrogen flow direction and there is at least one on the second pipeline 6 The check valve group 100 of non-return valve is provided with the first valve 15 on third pipeline 10, is provided with the second valve on the 4th pipeline 11 16, third valve 17 is provided on the 5th pipeline 12, and the 4th valve 18, and exhaust emission system 8 are provided on the 6th pipeline 13 With the exhaust isolating valve 19 for controlling the exhaust of pressure release case 3.

A kind of row's hydrogen purge system for pressurized water reactor nuclear island container purging provided by the invention, with prior art phase Than including the row's hydrogen purge system purged for pressurized water reactor nuclear island container, arranging hydrogen purge system includes for holding with nuclear island The connected voltage-stablizer 1 of device, the endless tube 2 being connected to voltage-stablizer 1, the pressure release for collecting and condensing the vapor that voltage-stablizer 1 discharges Case 3, for into pressure release case 3 supplement nitrogen purging nuclear island nitrogen supply system 4, connection endless tube 2 and pressure release case 3 the first pipeline 5, Second pipeline 6 of connection pressure release case 3 and nuclear island nitrogen supply system 4 is let out for the water charging system 7 of the moisturizing into pressure release case 3, for confession Press the exhaust emission system 8, the drainage system 9 for draining for pressure release case 3, connection exhaust gas row of the hydrogeneous exhaust gas discharge in case 3 Place system 8 and the third pipeline 10 of pressure release case 3 connect water charging system 7 and the 4th pipeline 11 of pressure release case 3, connect drainage system 9 With the 5th pipeline 12 of pressure release case 3 and it connect the 6th pipeline 13 of endless tube 2 Yu exhaust emission system 8, edge on the second pipeline 6 Nitrogen flow direction is disposed with for nitrogen pressure reducing valve 14 and the check valve group 100 at least one non-return valve, third pipe It is provided with the first valve 15 on line 10, the second valve 16 is provided on the 4th pipeline 11, is provided with third valve on the 5th pipeline 12 Door 17 is provided with the 4th valve 18 on the 6th pipeline 13, and exhaust emission system 8 has for controlling 8 row of exhaust emission system The exhaust isolating valve 19 of gas.During carrying out moisturizing, supplement nitrogen purging to pressure release case 3, due to connecting nuclear island for nitrogen Second pipeline 6 of system 4 and pressure release case 3 is equipped with check valve group 100, reduces the back pressure in pressure release case 3, makes water charging system 7 Water can be full of by moisturizing to entire pressure release case 3 into pressure release case 3, the space almost all of hydrogeneous exhaust gas will be accommodated in pressure release case 3 It squeezes compression and pressure release case 3 is all discharged in hydrogeneous exhaust gas；Then, moisturizing is stopped to pressure release case 3 and drained, until pressure release Water level decreasing in case 3 is to ordinary water level, and while the water level in pressure release case 3 reduces, nuclear island nitrogen supply system 4 passes through the second pipe Line 6 supplements nitrogen into pressure release case 3, by constantly increase in pressure release case 3 can supplied gas accommodating space quickly fill with, to reach To by the purpose that all purging displacement is discharged of the hydrogeneous exhaust gas in pressure release case 3, the hydrogen content in pressure release case 3 is made to be down to 0.5V/V% Hereinafter, avoiding that the quick-fried risk of hydrogen occurs.Also, during carrying out moisturizing purging to pressure release case 3: the water in pressure release case 3 Position is when raising, and if only if the pressure in pressure release case 3 be less than 100 downstream of check valve group for nitrogen pressure when, nuclear island nitrogen supply system 4 The second pipeline 6 could be passed through and supplement the hydrogeneous exhaust gas of nitrogen purging into pressure release case 3, the hydrogeneous exhaust gas in pressure release case 3 is purged It cements out, to rapidly reduce the hydrogen content in pressure release case 3；And when the pressure in pressure release case 3 is greater than or equal to check 100 downstream of valve group for nitrogen pressure when, stream of nitrogen gas cannot be supplemented to non-return valve by the second pipeline 6 by nuclear island nitrogen supply system 4 In the pressure release case 3 in 100 downstreams of group, effectively prevents pressure release case 3 and builds the pressure during the hydrogeneous exhaust gas discharge of moisturizing booster compression, The back pressure for causing hydrogeneous exhaust gas to be discharged in unsmooth and pressure release case 3 is larger or even the danger of 3 explosion of pressure release case occurs.

Preferably, row's hydrogen purge system further includes the switch for controlling the second pipeline 6 to 100 downstream of check valve group for nitrogen Valve 20 and for detecting and showing 100 upstream of check valve group for the first pressure gauge 21 of nitrogen pressure, switch valve 20 is set to second On pipeline 6 and positioned at check valve group 100 and between nitrogen pressure reducing valve 14, first pressure gauge 21 is set on the second pipeline 6 and position In switch valve 20 and between nitrogen pressure reducing valve 14.On the second pipeline 6 and positioned at check valve group 100 and between nitrogen pressure reducing valve 14 It is provided with switch valve 20, to control nuclear island nitrogen supply system 4 to the second pipeline 6 for nitrogen；On the second pipeline 6 and it is located at switch valve 20 and for being provided with pressure gauge between nitrogen pressure reducing valve 14, nuclear island nitrogen supply system 4 is carried out accurately for nitrogen pressure reducing valve 14 with will pass through Ground pressure is adjusted, and improves nitrogen to the purging efficiency and effect of pressure release case 3.

Preferably, check valve group 100 includes the first non-return valve 101 and the second non-return valve 102, the first non-return valve 101 and the Two non-return valves 102 are set in turn on the second pipeline 6 along nitrogen flow direction.In the second pipeline 6, two non-return valves, a side are set Face is arranged using redundancy, can still be guaranteed by another non-return valve in the case where a wherein check defective valve normal Nitrogen purge work, will not influence nitrogen to the row's hydrogen work of the purging of pressure release case 3；On the other hand, it is arranged in series using two Non-return valve, can play step by step reduce pressure buffering effect, avoid instantaneous pressure from causing intense impact and damage non-return valve, To ensure reliability and safety of second pipeline 6 for nitrogen.

Preferably, the first non-return valve 101, which uses, is easy to flow automatic open and close flap (spool) by gas medium itself Lift non-return valve, so as in pressure release case 3 pressure it is lower (be lower than p₂When) when, the second pipeline 6 is interior and is located at the first check The nitrogen pressure of 101 upstream of valve opens the first non-return valve 101 automatically, and pressure is higher (not less than p in pressure release case 3₂) when, it rises Drop formula non-return valve is automatically closed by the weight of itself spool (flap), efficiently controls and uses positioned at 101 downstream of the first non-return valve The back pressure at family in low-pressure state, avoid the second pipeline 6 and 101 downstream user back pressure of the first non-return valve it is excessive cause to build the pressure it is even quick-fried The danger of pipe.

Preferably, the second non-return valve 102, which uses, is easy to flow automatic open and close flap (spool) by gas medium itself Lift non-return valve, so as in pressure release case 3 pressure it is lower (be lower than p₂When) when, the second pipeline 6 is interior and is located at the second check The nitrogen pressure of 102 upstream of valve opens the second non-return valve 102 automatically, and pressure is higher (not less than p in pressure release case 3₂) when, it rises Drop formula non-return valve is automatically closed by the weight of itself spool (flap), efficiently controls and uses positioned at 102 downstream of the second non-return valve The back pressure at family in low-pressure state, avoid the second pipeline 6 and 102 downstream user back pressure of the second non-return valve it is excessive cause to build the pressure it is even quick-fried The danger of pipe.

The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.

Claims

1. a kind of pressurized water reactor nuclear island container blowing method, it is characterised in that: this method includes being used for pressurized water reactor nuclear island Row's hydrogen purge system of container purging, row's hydrogen purge system include voltage-stablizer for being connected with nuclear island container, with it is described The endless tube of voltage-stablizer connection, is used for the pressure release pressure release case for collecting and condensing the vapor that the voltage-stablizer discharges The nuclear island nitrogen supply system of nitrogen and the row of purging hydrogen is supplemented in case, is connected the endless tube and the first pipeline of the pressure release case, is connect Second pipeline of the pressure release case and the nuclear island nitrogen supply system, for into the pressure release case water charging system of moisturizing, be used for The exhaust emission system being discharged for the hydrogeneous exhaust gas in the pressure release case, connects the drainage system for supplying pressure release case draining Connect the exhaust emission system and the third pipeline of the pressure release case, the 4th pipe for connecting the water charging system with the pressure release case Line, the connection drainage system and the 5th pipeline of the pressure release case and it connect the endless tube and the exhaust emission system The 6th pipeline, be disposed with for nitrogen pressure reducing valve along nitrogen flow direction and there is at least one on second pipeline The check valve group of non-return valve is provided with the first valve on the third pipeline, is provided with the second valve on the 4th pipeline, institute It states and is provided with third valve on the 5th pipeline, the 4th valve is provided on the 6th pipeline, and the exhaust emission system has There is the exhaust isolating valve for controlling the exhaust emission system exhaust；The pressurized water reactor nuclear island container blowing method includes Following steps:

Pressure debugging: adjust it is described for nitrogen pressure reducing valve, control the nuclear island nitrogen supply system into second pipeline for nitrogen pressure Power is p₀, and p₀Greater than △ p₀, so that the stream of nitrogen gas in second pipeline can open described in the check valve group and entrance Check valve group downstream user；

Level pressure is for nitrogen: after closing the 4th valve, first valve and opening the exhaust isolating valve, being then turned on simultaneously It adjusts described for nitrogen pressure reducing valve, the nuclear island nitrogen supply system is made to be remained above or be equal to p₀Constant pressure p₁, pass through described second Pipeline continues to the check valve group downstream user for nitrogen；And second pipeline is transferred into the check valve group downstream user P is denoted as nitrogen pressure₂, i.e. p₂For p₁With △ p₀Difference；

It arranges hydrogen purging: opening second valve and the 4th valve, supplement the water charging system into the pressure release case Pressure of the water to raise the water level in the pressure release case, during the water level in the pressure release case is raised in the pressure release case p₃Rise, the hydrogeneous exhaust gas in the pressure release case is discharged by the exhaust emission system；And if only if in the pressure release case Pressure p₃Less than p₂When, it is hydrogeneous that the nuclear island nitrogen supply system supplements nitrogen purging by second pipeline into the pressure release case Exhaust gas；

Nitrogen supplement: until the water level in the pressure release case reaches the 100% of the pressure release case height with will be in the pressure release case Hydrogeneous exhaust gas all discharge after, successively close second valve, the exhaust isolating valve and the 4th valve, be then turned on The third valve makes the pressure release case to externally drained；During water level in the pressure release case reduces, the pressure release Pressure p in case₄Decline, the pressure p in the pressure release case₄Less than p₂When, the nuclear island nitrogen supply system passes through described Second pipeline supplements nitrogen into the pressure release case；Until the water level in the pressure release case is reduced to ordinary water level, described in closing Third valve stops draining.

2. pressurized water reactor nuclear island container blowing method as described in claim 1, which is characterized in that this method further includes in institute Level pressure is stated for the pressure check step between nitrogen step and row's hydrogen purge step, the pressure check step includes following step Rapid: opening is set on second pipeline and is located at the check valve group and the switch valve between nitrogen pressure reducing valve, point The switch valve and the first pressure gauge between nitrogen pressure reducing valve Guan Cha be set on second pipeline and be located at Pressure change, while observation is set to the pressure on second pipeline and being located at the second pressure gauge in check valve group downstream Variation: it is raised slowly to p again after the pressure value of the first pressure gauge is in decline₀, and the pressure value of the second pressure gauge P is raised slowly to from 0₂When, it can be supplemented by second pipeline into the pressure release case with the determination nuclear island nitrogen supply system Nitrogen purging, and it is p that the nuclear island nitrogen supply system, which transfers to the nitrogen pressure in the pressure release case by second pipeline,₂。

3. pressurized water reactor nuclear island container blowing method as described in claim 1, which is characterized in that walked in the calculation of pressure In rapid, the check valve group includes the first non-return valve and the second non-return valve, first non-return valve and second non-return valve edge Nitrogen flow direction is set in turn on second pipeline.

4. pressurized water reactor nuclear island container blowing method as claimed in claim 3, which is characterized in that walked in the calculation of pressure In rapid, minimum pressure △ p required for first non-return valve is opened₁With open minimum pressure △ required for the second non-return valve p₂It is not identical, and △ p₁With △ p₂The sum of be △ p₀。

5. pressurized water reactor nuclear island container blowing method as claimed in claim 4, which is characterized in that open first check Minimum pressure △ p required for valve₁Greater than opening minimum pressure △ p required for second non-return valve₂。

6. such as the described in any item pressurized water reactor nuclear island container blowing methods of claim 3 to 5, which is characterized in that open institute The control of pressure limit required for the first non-return valve is stated in 0.005MPa~0.006MPa.

7. such as the described in any item pressurized water reactor nuclear island container blowing methods of claim 3 to 5, which is characterized in that open institute The control of pressure limit required for the second non-return valve is stated in 0.004~0.005MPa.

8. such as pressurized water reactor nuclear island container blowing method described in any one of claim 1 to 5, which is characterized in that described Level pressure is in nitrogen step, the nuclear island nitrogen supply system is controlled for nitrogen pressure limit in 0.03MPa~0.05MPa.

9. pressurized water reactor nuclear island container blowing method as claimed in claim 8, which is characterized in that walked in the level pressure for nitrogen In rapid, adjusted by the decompression for nitrogen pressure reducing valve, the nuclear island nitrogen supply system is adjusted to constant pressure for nitrogen pressure Power, and make the constant for nitrogen pressure p of the nuclear island nitrogen supply system₁For 0.025MPa.

10. such as pressurized water reactor nuclear island container blowing method described in any one of claim 1 to 5, which is characterized in that described It arranges in hydrogen purge step, the pressure p in the pressure release case₃No more than 0.05MPa.

11. such as pressurized water reactor nuclear island container blowing method described in any one of claim 1 to 5, which is characterized in that described It arranges in hydrogen purge step, the water charging system is the make-up system of reactor boron and water, the supply system of the reactor boron and water The supplement into the pressure release case of uniting passes through the demineralized water for removing salt treatment.

12. such as pressurized water reactor nuclear island container blowing method described in any one of claim 1 to 5, which is characterized in that described Nitrogen supplements in step, the pressure p in the pressure release case₄No more than 0.05MPa.

13. such as pressurized water reactor nuclear island container blowing method described in any one of claim 1 to 5, which is characterized in that described Nitrogen supplements in step, and when the water level in the pressure release case is reduced to ordinary water level, the water level in the pressure release case reaches described Pressure release case altitude range be 60%~70%.

14. pressurized water reactor nuclear island container blowing method as claimed in claim 13, which is characterized in that supplemented in the nitrogen In step, the water level in the pressure release case reaches the 65% of the pressure release case height, to confirm that the water level in the pressure release case drops Down to ordinary water level and close the third valve stopping draining.

15. such as pressurized water reactor nuclear island container blowing method described in any one of claim 1 to 5, which is characterized in that described the One valve is the outlet isolating valve for controlling the pressure release case port opening or closing.

16. such as pressurized water reactor nuclear island container blowing method described in any one of claim 1 to 5, which is characterized in that described the Two valves are the moisturizing isolating valve for controlling water charging system moisturizing into the pressure release case.

17. such as pressurized water reactor nuclear island container blowing method described in any one of claim 1 to 5, which is characterized in that described the Three valves are for controlling the drainage system for the draining isolating valve of the water discharge in the pressure release case.

18. such as pressurized water reactor nuclear island container blowing method described in any one of claim 1 to 5, which is characterized in that described the Four valves are to be connected to the exhaust emission system or the endless tube isolating valve of disconnected state for controlling the endless tube.

19. such as pressurized water reactor nuclear island container blowing method described in any one of claim 1 to 5, which is characterized in that described the The manual isolation valve for controlling the nuclear island nitrogen supply system to the pressure release case for nitrogen is additionally provided on two pipelines, and described manual Isolating valve is located at the downstream of the check valve group.

20. such as pressurized water reactor nuclear island container blowing method described in any one of claim 1 to 5, which is characterized in that the row Hydrogen purge system further include for the sampling system for being sampled analysis containing hydrogen and nitrogen gas to the aggregation in the pressure release case, it is described Sampling system is connected with the third pipeline.

21. such as pressurized water reactor nuclear island container blowing method described in any one of claim 1 to 5, which is characterized in that the row Hydrogen purge system further includes that the radioactivity in the pressure release case is hydrogeneous or the exhaust treatment system of oxygen-containing exhaust gas for handling, described Exhaust treatment system is connected with the third pipeline.

22. such as pressurized water reactor nuclear island container blowing method described in any one of claim 1 to 5, which is characterized in that described useless Gas exhaust system is nuclear island exhaust and draining system.

23. such as pressurized water reactor nuclear island container blowing method described in any one of claim 1 to 5, which is characterized in that described It arranges in hydrogen purge step or nitrogen supplement step, the normally-pressured neighbor of the pressure release case is 0.02MPa~0.035MPa.

24. pressurized water reactor nuclear island container blowing method as claimed in claim 23, which is characterized in that the volume of the pressure release case Constant-pressure is 0.02MPa.

25. such as pressurized water reactor nuclear island container blowing method described in any one of claim 1 to 5, which is characterized in that the row Hydrogen purge system further includes the pressure-detecting device for detecting pressure in the pressure release case.

26. pressurized water reactor nuclear island container blowing method as claimed in claim 25, which is characterized in that row's hydrogen purging system System further includes the warning device being electrical connected with the pressure-detecting device, when the pressure-detecting device detects the pressure release When pressure in case is more than 0.05MPa, the warning device issues alarm signal.

27. a kind of row's hydrogen purge system for pressurized water reactor nuclear island container purging, it is characterised in that: row's hydrogen purging system It is system includes voltage-stablizer for being connected with nuclear island container, is connected to the voltage-stablizer endless tube, described steady for collecting and condensing The pressure release case of the vapor of depressor discharge, the nuclear island nitrogen supply system for supplementing nitrogen into the pressure release case, the connection ring Pipe and the first pipeline of the pressure release case, connect the pressure release case with the second pipeline of the nuclear island nitrogen supply system, be used for The water charging system of moisturizing in the pressure release case, for for the hydrogeneous vapor discharge in the pressure release case exhaust emission system, The third pipeline of drainage system, the connection exhaust emission system and the pressure release case for draining for the pressure release case connects Connect the water charging system and the 4th pipeline of the pressure release case, the 5th pipeline for connecting the drainage system and the pressure release case, And the 6th pipeline of the endless tube and the exhaust emission system is connected, on second pipeline successively along nitrogen flow direction It is provided with for nitrogen pressure reducing valve and the check valve group at least one non-return valve, is provided with the first valve on the third pipeline , it is provided with the second valve on the 4th pipeline, third valve is provided on the 5th pipeline, is set on the 6th pipeline It is equipped with the 4th valve, and the exhaust emission system has the exhaust isolating valve for controlling the pressure release case exhaust.

28. row's hydrogen purge system as claimed in claim 27, which is characterized in that row's hydrogen purge system further includes for controlling Second pipeline is made to check valve group downstream for the switch valve of nitrogen and for detecting and showing check valve group upstream For the first pressure gauge of nitrogen pressure, the switch valve is set on second pipeline and is located at the check valve group and the confession Between nitrogen pressure reducing valve, the first pressure gauge is set on second pipeline and is located at the switch valve and depressurizes with described for nitrogen Between valve.

29. as claimed in claim 27 row hydrogen purge system, which is characterized in that the check valve group include the first non-return valve and Second non-return valve, first non-return valve and second non-return valve are set in turn in second pipeline along nitrogen flow direction On.

30. row's hydrogen purge system as claimed in claim 29, which is characterized in that first non-return valve is lift check Valve.

31. row's hydrogen purge system as claimed in claim 29, which is characterized in that second non-return valve is lift check Valve.