CN106057258B - Nuclear power station electrical penetration pressure gauge on-line metering method and its pressure monitoring device - Google Patents
Nuclear power station electrical penetration pressure gauge on-line metering method and its pressure monitoring device Download PDFInfo
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- CN106057258B CN106057258B CN201610375782.6A CN201610375782A CN106057258B CN 106057258 B CN106057258 B CN 106057258B CN 201610375782 A CN201610375782 A CN 201610375782A CN 106057258 B CN106057258 B CN 106057258B
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- pressure gauge
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- electrical penetration
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/002—Detection of leaks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention discloses a kind of nuclear power station electrical penetration pressure gauge on-line metering method and its pressure monitoring device, the pressure monitoring device to include：Threeway valve group, the threeway valve group are arranged on the connecting pipe between electrical penetration and pressure gauge, for closing and isolating the electrical penetration and pressure gauge；Standard pressure gauge, connected with the pressure gauge by same connecting pipe, for obtaining the accurate pressure value of gas in connecting pipe；Nitrogen pot, connect after a regulating valve with the pressure gauge, standard pressure gauge, adjust gas in the connecting pipe and reach school inspection pressure spot.The present invention can carry pressure gauge to the electrical penetration during operation and carry out on-line metering verification, under the premise of ensuring that the 3rd safety curtain is complete, realize the periodic verification of pressure meter accuracy, so as to be changed in time to the undesirable pressure gauge of required precision.
Description
Technical field
The present invention relates to technical field of nuclear power safety, more particularly to a kind of nuclear power station electrical penetration pressure gauge on-line metering
Method and its pressure monitoring device.
Background technology
Nuclear power plant containment shell, i.e. reactor building, it is a cylindrical prestressed reinforced concrete for carrying torispheric domes
Soil structure, for stopping that fission product from fuel and primary Ioops radioactive substance enter last one of barrier of environment.When
When loss of-coolant accident (LOCA) occurs for reactor, a large amount of radioactivity and HTHP steam water interface that discharge can be contained and isolate,
To prevent from producing harm to nuclear power station surrounding resident.
Nuclear power plant containment shell is most important for the security of nuclear power station, it is therefore desirable to ensures containment to greatest extent
Performance is up to standard.Containment bulge test is used for sealing energy of the simplation verification containment under large break dehydration (LOCA) emergency conditions
Power, for ensure nuclear power plant operation have very important meaning, be required in Construction of Unit stage and unit operation stage into
Row experiment.Wherein, electrical penetration, i.e., the electric wire inside reactor building leads to outside transmission channel, through safety
Thimble body, the protective screen of nuclear power station the 3rd is play jointly with containment body, mechanical penetration piece, access lock, equipment gate
The key player of barrier.As shown in figure 4, existing electrical penetration 1 is generally located in containment body 2；On the inside of from containment
21 extend through 22 on the outside of containment, realize the connection of inside cable 3 and external cable 4；By nitrogen interface 6 to electrical penetration
1 Pneumatic assembly provides power, realizes that pressure seal shields, pressure gauge 5 monitors the pressure value inside electrical penetration 1.Normally
2.5 ± 10%bar.g of maintenance pressure is needed during operation, inside electrical penetration, to limit radioactive substance by electrical penetration
Leak.
Though electrical penetration is mounted in the quiet machine equipment on npp safety shell, fluid line is arranged on relative to other
And without outside focus for the pressure gauge on rotating machinery, but its installation environment it is severe and long-term use of caused by internal mechanical
Damage, the inaccurate risk of monitor value be present.If the monitor value of a certain piece of pressure gauge is inaccurate, then can not complete to electrically passing through
The real-time monitoring of part internal pressure is worn, can not judge whether electrical penetration pressure boundary is complete afterwards.And once pressure gauge is not
The low signal of electrical penetration pressure is traced into time, there will be the risk that radioactive substance leaks.Therefore, need to be to electrically running through
Part pressure gauge carries out periodic dosages to ensure its accuracy.However, the limitation of electrical penetration structure, electrical penetration is from pressure
Power table can not carry out periodic metering, so as to judge whether the precision for runing later stage table meets onsite application demand.
If being measured offline, the stages such as equipment pressure release, pressure gauge dismounting, censorship, pressure gauge time dress, equipment pressurising need to be undergone.Should
Not only the duration is longer for method, there is the risk for losing pressure boundary integrality.Meanwhile during equipment pressure release, also bring along nitrogen
Asphyxia risk.
The content of the invention
The present invention for existing electrical penetration pressure gauge present in prior art can not the metering of property performance period, carry out
Offline metrological operation is complicated, duration length, nitrogen asphyxia also be present and loses the risk of pressure boundary integrality this technology
Problem, there is provided a kind of nuclear power station electrical penetration pressure gauge on-line metering method and its pressure monitoring device.
On the one hand, the invention provides a kind of nuclear power station electrical penetration pressure gauge on-line metering method, including following step
Suddenly：
Connecting pipe between S1, closing electrical penetration and pressure gauge, isolates the electrical penetration and the pressure
Table；
S2, connection need the pressure gauge and standard pressure gauge, nitrogen pot measured；
Gas pressure value in S3, regulation connecting pipe, the pressure gauge is examined in school.
Optionally, in the step S2, the pressure gauge with, standard pressure gauge, nitrogen pot connected by same connecting pipe
It is logical.
Optionally, the step S3 also includes sub-step：
Gas pressure value reaches school inspection pressure spot in S31, regulation connecting pipe；
Pressure gauge described in S32, comparison and standard pressure gauge the deviation of reading value when pressure spot is examined in school, judge the pressure gauge
Whether required precision is met.
Optionally, the nuclear power station electrical penetration pressure gauge on-line metering method is further comprising the steps of：
S4, ambient temperature value is obtained in real time, correct the deviation of reading value when pressure spot is examined in school.
Optionally, the accuracy class of the standard pressure gauge should be not less than the 1/4 of the pressure gauge.
On the other hand, present invention also offers a kind of pressure monitoring of nuclear power station electrical penetration pressure gauge on-line metering dress
Put, including：
Threeway valve group, the threeway valve group is arranged on the connecting pipe between electrical penetration and pressure gauge, for sealing
Close and isolate the electrical penetration and pressure gauge；
Standard pressure gauge, connected with the pressure gauge by same connecting pipe, for obtaining gas in connecting pipe
Accurate pressure value；
Nitrogen pot, connect a regulating valve after with the pressure gauge, standard pressure gauge, adjust the gas in the connecting pipe
Reach school inspection pressure spot.
Optionally, the pressure monitoring device also includes nitrogen monitoring modular, for obtaining environment nitrogen content number in real time
Value.A small amount of leakage of nitrogen is likely to result in during metering, by the module monitors nitrogen content to ensure the safety of metrological personnel.
Optionally, the pressure monitoring device also includes temperature monitoring module, for obtaining ambient temperature value in real time.Nitrogen
Gas pressure under different temperature conditionss can change, and be advised according to air pressure change of the nitrogen under different environment temperatures
Rule, the measured value of pressure gauge and standard pressure gauge is corrected, the error that temperature introduces during so as to reduce metering.
Optionally, the standard pressure gauge accuracy class is not less than the 1/4 of tested pressure gauge；The electrical penetration pressure
The accuracy class of table is 1.6 grades；The standard pressure gauge accuracy class is not less than 0.4 grade；
Optionally, the standard pressure gauge, nitrogen pot, nitrogen monitoring modular and temperature monitoring module are arranged on a metering
On support；The bottom of the metering support is provided with travel mechanism, for quickly moving the pressure monitoring device.
Optionally, the steel frame construction of multiple necks, the standard pressure gauge, nitrogen are provided with the metering support
Gas tank, nitrogen monitoring modular and temperature monitoring module are arranged in the neck.
Optionally, the threeway valve group includes penetration piece interface, inflatable interface, pressure gauge connection and the first stop valve；Institute
The connection relative with the inflatable interface of penetration piece interface is stated, the pressure gauge connection with the penetration piece interface with described by filling
Gas interface is connected by vertical pipe, and first stop valve is arranged between the penetration piece interface and the inflatable interface,
For ending the inflatable interface；Pressure measurement device interface, the pressure gauge connection are additionally provided with the vertical pipe
Connected with the pressure measurement device interface, the second stop valve is arranged on below the pressure measurement device interface, for ending
The pressure gauge connection and the pressure measurement device interface.
One or more technical schemes that the present invention program provides, have at least the following technical effects or advantages：
In technical scheme, nuclear power station electrical penetration pressure gauge on-line metering method：Electrical penetration with
Threeway valve group is added between pressure gauge,, can be with by the introducing of threeway valve group to realize isolating for electrical penetration and pressure gauge
The on-line metering to pressure gauge is completed in the case of not pressure release；The integrality of pressure boundary had so both been ensure that, while had also been tested
The accuracy of pressure gauge is demonstrate,proved.Therefore, technical scheme can carry pressure gauge to the electrical penetration during operation
On-line metering verification is carried out, under the premise of ensuring that the 3rd safety curtain is complete, realizes the periodic verification of pressure meter accuracy, from
And the undesirable pressure gauge of required precision is changed in time.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is the first nuclear power station electrical penetration pressure gauge on-line metering method flow provided in an embodiment of the present invention
Figure；
Fig. 2 is second of nuclear power station electrical penetration pressure gauge on-line metering method flow provided in an embodiment of the present invention
Figure；
Fig. 3 is the third nuclear power station electrical penetration pressure gauge on-line metering method flow provided in an embodiment of the present invention
Figure；
Fig. 4 is the mounting structure schematic diagram of the existing electrical equipment penetration piece in the present invention；
Fig. 5 is the pressure monitoring device mounting structure schematic diagram in the present invention；
Fig. 6 is the threeway valve group front sectional view in the present invention；
Fig. 7 is the threeway valve group left view sectional view in the present invention.
Embodiment
By providing a kind of nuclear power station electrical penetration pressure gauge on-line metering method in the embodiment of the present invention, solve existing
During having the metering of electrical penetration pressure gauge, existing following technical problem：
1) metering cycle is grown；Nuclear power station single unit is provided with 79 electrical penetrations to realize cable and wire inside and outside nuclear island altogether
Transmission；If implementing the regular censorship of pressure gauge, then it is more certainly will to undergo pressure release, pressure gauge dismounting, censorship, time dress, pressurising etc.
It is the individual stage, time-consuming to directly result in electrical penetration at two months or so and be chronically at the not monitored state of pressure.
2) pressure release leads to not the integrality for ensureing the 3rd barrier；Containment cylinder, personnel and equipment gate, machinery pass through
Wear part, electrical penetration together constitutes the 3rd safety curtain of nuclear power station, the failure of any of which part can all be led
Cause the imperfect of pressure boundary.
3) introducing nitrogen makes one the risk of asphyxia；To ensure sealing, about 15m is filled with electrical penetration3Nitrogen
Gas is to maintain pressure.Therefore, there will be about 15m during pressure release3Nitrogen be released in surrounding environment, compressed nitrogen asphyxia be present
Risk.
The technical scheme of the embodiment of the present invention is in order to solve the above technical problems, general thought is as follows：
Because existing electrical penetration cylinder is joined directly together with pressure gauge with pipeline, centre does not have any barrier to arrange
Impose and ensure its independence, therefore be difficult to realize the on-line metering of pressure gauge under the current model.Technical scheme is improved
Electrical penetration and pressure gauge connecting line, add threeway valve group between penetration piece cylinder and pressure gauge, are run through with realizing
Part is isolated with pressure gauge, and coordinates a whole set of Portable metering device to use, so as to reach the purpose of pressure gauge on-line metering.
As shown in figure 1, the present invention improves a kind of nuclear power station electrical penetration pressure gauge on-line metering method, including it is following
Step：
Connecting pipe between S1, closing electrical penetration and pressure gauge, isolates the electrical penetration and the pressure
Table；
S2, connection need the pressure gauge and standard pressure gauge, nitrogen pot measured；
Gas pressure value in S3, regulation connecting pipe, the pressure gauge is examined in school.
Optionally, in the step S2, the pressure gauge with, standard pressure gauge, nitrogen pot connected by same connecting pipe
It is logical.
In specific implementation process, Fig. 2, a kind of nuclear power station electrical penetration pressure gauge on-line metering method refer to
Described in step S3 also include sub-step：
Gas pressure value reaches school inspection pressure spot in S31, regulation connecting pipe；
Pressure gauge described in S32, comparison and standard pressure gauge the deviation of reading value when pressure spot is examined in school, judge the pressure gauge
Whether required precision is met.
In specific implementation process, Fig. 3, a kind of nuclear power station electrical penetration pressure gauge on-line metering method refer to
It is further comprising the steps of：
S4, ambient temperature value is obtained in real time, correct the deviation of reading value when pressure spot is examined in school.
Optionally, the accuracy class of the standard pressure gauge should be not less than the 1/4 of the pressure gauge.
Based on same inventive concept, Fig. 5 is refer to, embodiments of the invention additionally provide a kind of nuclear power station electrical penetration
The pressure monitoring device of pressure gauge on-line metering, including：
Threeway valve group 10, the threeway valve group 10 are arranged on the connecting pipe between electrical penetration 1 and pressure gauge 5,
For closing and isolating the electrical penetration 1 and pressure gauge 5；
Standard pressure gauge 20, connected with the pressure gauge 5 by same connecting pipe, for obtaining gas in connecting pipe
Accurate pressure value；
Nitrogen pot 30, connect a regulating valve 31 after with the pressure gauge 5, standard pressure gauge 20, adjust the connecting pipe
Interior gas reaches school inspection pressure spot.
Optionally, the pressure monitoring device also includes nitrogen monitoring modular 40, for obtaining environment nitrogen content in real time
Numerical value.A small amount of leakage of nitrogen is likely to result in during metering, by the module monitors nitrogen content to ensure the peace of metrological personnel
Entirely.
Optionally, the pressure monitoring device also includes temperature monitoring module 50, for obtaining ambient temperature value in real time.Nitrogen
Gas pressure of the gas under different temperature conditionss can change, according to air pressure change of the nitrogen under different environment temperatures
Rule, the measured value of pressure gauge and standard pressure gauge is corrected, the error that temperature introduces during so as to reduce metering.
Optionally, the accuracy class of standard pressure gauge 20 is not less than the 1/4 of tested pressure gauge 5；The electrical penetration
The accuracy class of pressure gauge 5 is 1.6 grades；The accuracy class of standard pressure gauge 20 is not less than 0.4 grade；
Optionally, the standard pressure gauge 20, nitrogen pot 30, nitrogen monitoring modular 40 and temperature monitoring module 50 are set
On a metering support 60；The bottom of the metering support 60 is provided with travel mechanism 61, for quickly moving the pressure prison
Survey device.
Optionally, the steel frame construction (not shown) of multiple necks, the mark are provided with the metering support 60
Quasi- pressure gauge 20, nitrogen pot 30, nitrogen monitoring modular 40 and temperature monitoring module 50 are arranged in the neck.
Optionally, as shown in Figure 6,7, threeway valve group 10 includes penetration piece interface 101, inflatable interface 102, pressure gauge connection
103rd, the first stop valve 104；The penetration piece interface 101 is relative with the inflatable interface 102 to be connected, the pressure gauge connection
103 with the penetration piece interface 101 with the inflatable interface 102 by vertical pipe by being connected, first stop valve 104
It is arranged between the penetration piece interface 101 and the inflatable interface 102, for ending the inflatable interface 102；Hung down described
Pressure measurement device interface 105, the pressure gauge connection 103 and the pressure measurement device interface are additionally provided with straight pipeline
105 connections, the second stop valve 106 is arranged on the lower section of pressure measurement device interface 105, for ending the pressure gauge connection
103 with the pressure measurement device interface 105.
Existing threeway valve group 10 does not have pressure measurement device interface and the second stop valve, it is impossible to realizes electrical penetration
Isolating between pressure gauge, the first stop valve are used only for ending inflatable interface；Threeway valve group 10 in the present invention passes through weight
After new design, isolating between electrical penetration and pressure gauge can be realized, and there is provided pressure measurement device interface and pressure
Power table orifice, the accurate pressure value of gas in readily available same connecting pipe, and pressure gauge numerical value are formed and compared.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (11)
- A kind of 1. nuclear power station electrical penetration pressure gauge on-line metering method, it is characterised in that comprise the following steps：S1, the connecting pipe between electrical penetration and pressure gauge, isolation are closed by the threeway valve group with pressure gauge connection The electrical penetration and the pressure gauge；On vertical pipe set pressure measurement device interface, the pressure gauge connection with The pressure measurement device interface connection, end institute by being arranged on the second stop valve below the pressure measurement device interface State pressure gauge connection and the pressure measurement device interface；S2, connection need the pressure gauge and standard pressure gauge, nitrogen pot measured；Gas pressure value in S3, regulation connecting pipe, the pressure gauge is examined in school.
- A kind of 2. nuclear power station electrical penetration pressure gauge on-line metering method according to claim 1, it is characterised in that institute State in step S2, the pressure gauge with, standard pressure gauge, nitrogen pot connected by same connecting pipe.
- 3. a kind of nuclear power station electrical penetration pressure gauge on-line metering method according to claim 1 or 2, its feature exist In the step S3 also includes sub-step：Gas pressure value reaches school inspection pressure spot in S31, regulation connecting pipe；Whether pressure gauge described in S32, comparison and standard pressure gauge the deviation of reading value when pressure spot is examined in school, judge the pressure gauge Meet required precision.
- A kind of 4. nuclear power station electrical penetration pressure gauge on-line metering method according to claim 3, it is characterised in that institute It is further comprising the steps of to state nuclear power station electrical penetration pressure gauge on-line metering method：S4, ambient temperature value is obtained in real time, correct the deviation of reading value when pressure spot is examined in school.
- A kind of 5. pressure monitoring device of nuclear power station electrical penetration pressure gauge on-line metering, it is characterised in that including：Threeway valve group, the threeway valve group are arranged on the connecting pipe between electrical penetration and pressure gauge, for closing simultaneously Isolate the electrical penetration and pressure gauge；The threeway valve group includes pressure gauge connection, and pressure is additionally provided with vertical pipe Power metering device interface, the pressure gauge connection connect with the pressure measurement device interface, and the second stop valve is arranged on described Below pressure measurement device interface, for ending the pressure gauge connection and the pressure measurement device interface；Standard pressure gauge, connected with the pressure gauge by same connecting pipe, for obtaining the accurate of gas in connecting pipe Pressure value；Nitrogen pot, connect after a regulating valve with the pressure gauge, standard pressure gauge, adjust gas in the connecting pipe and reach Examine pressure spot in school.
- 6. a kind of pressure monitoring device of nuclear power station electrical penetration pressure gauge on-line metering according to claim 5, its It is characterised by, the pressure monitoring device also includes nitrogen monitoring modular, for obtaining environment nitrogen content numerical value in real time.
- 7. a kind of pressure monitoring device of nuclear power station electrical penetration pressure gauge on-line metering according to claim 5, its It is characterised by, the pressure monitoring device also includes temperature monitoring module, for obtaining ambient temperature value in real time.
- A kind of 8. pressure monitoring of nuclear power station electrical penetration pressure gauge on-line metering according to claim any one of 5-7 Device, it is characterised in that the standard pressure gauge accuracy class is not less than the 1/4 of tested pressure gauge；The electrical penetration pressure The accuracy class of power table is 1.6 grades；The standard pressure gauge accuracy class is not less than 0.4 grade.
- A kind of 9. pressure monitoring of nuclear power station electrical penetration pressure gauge on-line metering according to claim any one of 5-7 Device, it is characterised in that the standard pressure gauge, nitrogen pot, nitrogen monitoring modular and temperature monitoring module are arranged on a meter Measure on support；The bottom of the metering support is provided with travel mechanism, for quickly moving the pressure monitoring device.
- 10. a kind of pressure monitoring device of nuclear power station electrical penetration pressure gauge on-line metering according to claim 9, its Be characterised by, be provided with the steel frame constructions of multiple necks in the metering support, the standard pressure gauge, nitrogen pot, Nitrogen monitoring modular and temperature monitoring module are arranged in the neck.
- 11. a kind of pressure monitoring device of nuclear power station electrical penetration pressure gauge on-line metering according to claim 9, its It is characterised by, the threeway valve group also includes penetration piece interface, inflatable interface and the first stop valve；The penetration piece interface and institute The relative connection of inflatable interface is stated, the pressure gauge connection with the penetration piece interface and the inflatable interface by passing through described hang down Straight pipeline is connected, and first stop valve is arranged between the penetration piece interface and the inflatable interface, described for ending Inflatable interface.
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| CN108257694B (en) * | 2016-12-29 | 2019-09-17 | 中核核电运行管理有限公司 | A kind of nuclear power station main feed system performance supervision method |
| CN111834024B (en) * | 2020-07-23 | 2022-02-22 | 中国核动力研究设计院 | On-line accurate measurement method and system for pressure in containment vessel |
| CN115655575A (en) * | 2022-09-30 | 2023-01-31 | 中核核电运行管理有限公司 | Online calibration equipment of nuclear power plant's electric penetration piece manometer |
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| US4984448A (en) * | 1989-11-16 | 1991-01-15 | Atmos Energy Corporation | Leak detector and utilization pressure manifold |
| FR2821669B1 (en) * | 2001-03-02 | 2004-08-13 | Framatome Anp | METHOD AND DEVICE FOR CONTROLLING A SENSOR OF AN INDUSTRIAL INSTALLATION AND A SENSOR MEASUREMENT CHAIN |
| CN202484289U (en) * | 2012-04-01 | 2012-10-10 | 中国核动力研究设计院 | Pressure monitoring device for pressure vessel |
| CN102928182B (en) * | 2012-11-01 | 2016-02-03 | 辽宁省电力有限公司电力科学研究院 | Leakage test device for mechanical penetration piece of nuclear power plant containment vessel |
| CN204064589U (en) * | 2014-07-07 | 2014-12-31 | 中广核工程有限公司 | A kind of nuclear power station safety injection pipeline reverse checkvalve leakage test instrument |
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