CN103400612B - Nuclear power station can not the method for early warning of identified leakage and system - Google Patents
Nuclear power station can not the method for early warning of identified leakage and system Download PDFInfo
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- CN103400612B CN103400612B CN201310330453.6A CN201310330453A CN103400612B CN 103400612 B CN103400612 B CN 103400612B CN 201310330453 A CN201310330453 A CN 201310330453A CN 103400612 B CN103400612 B CN 103400612B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention discloses a kind of nuclear power station can not the method for early warning of identified leakage, and it comprises: digitizer Ore-controlling Role DCS receives the liquid level change information that continuous coverage liquid level gauge sends; DCS determines according to liquid level change information can not the leak rate of identified leakage; DCS judges whether leak rate exceedes the early warning value preset; If judge, leak rate exceedes the early warning value preset, and sends early warning information to master control system.Send liquid level change information by continuous coverage liquid level gauge to DCS, according to liquid level change information, DCS is judging whether leak rate exceedes the early warning value preset, if judge, leak rate exceedes the early warning value preset, and sends early warning information to master control system.Achieve nuclear power station run in occur can not identified leakage time, early warning information can be sent in time.In addition, the invention also discloses a kind of nuclear power station can not the early warning system of identified leakage.
Description
Technical field
The invention belongs to nuclear power station monitoring field, more particularly, the present invention relates to a kind of nuclear power station can not the method for early warning of identified leakage and system.
Background technology
Nuclear power station relies on the fission energy generating of radiomaterial fission release.Constantly there is chain reaction of nuclear fission in nuclear fuel, release a large amount of heat energy in reactor pressure vessel.The heat energy of release takes steam generator to by the cooling medium circulated in primary Ioops, and the recirculated water of secondary circuit is vaporized, thus pushing turbine acting.When nuclear power station normally runs, primary Ioops cooling medium is in high-temperature high-pressure state usually, once primary Ioops pressure boundary is leaked, can cause a large amount of vaporization of cooling medium and leak.Nuclear power station occurs to leak and mainly comprises identifiable design and leak (IdentifiedLeakage) and can not identified leakage (UnidentifiedLeakage).Wherein, identifiable design leaks point two classes, and a class can be collected and import a melt pit, gathers the leakage of tank or acquisition system, the seal leakage of such as pump or the packing leaking of valve; Another kind of is leak from known source to enter containment air, and this leakage can not affect can not the operation of identified leakage monitoring system.And other all leakage removed beyond identifiable design leakage can not be referred to by identified leakage, until can not be determined in identified leakage source, such as reactor coolant pressure boundary (ReactorCoolantPressureBoundary, RCPB) leaks.
For can not the monitoring of identified leakage be a difficult problem in nuclear power field always.At present, about can not the monitoring method of identified leakage mainly adopt float-type to measure monitoring method, namely hydrophobic hole liquid level be measured by float type flow meter.Float type flow meter is also referred to as spinner-type flowmeter, when taper measuring tube, the upper and lower side of float produces differential pressure and forms the power risen from bottom to top, raising force is greater than and soaks float weight in a fluid suffered by the float, float just rises, and annular space area just increases thereupon, and annular space place rate of flow of fluid declines immediately, float upper and lower side differential pressure reduces, act on the raising force of float also along with minimizing, until raising force equal to soak in a fluid float weight time, float is just stabilized in a certain height.The liquid level that float position is namely corresponding.Under stationary conditions, the liquid level in hydrophobic hole directly can be read according to the position of float.Can go out hydrophobic hole liquid level by rough measure by float type flow meter, method is simple, and cost is lower, but cannot Measurement accuracy can not the leak rate of identified leakage, cannot according to the leakage situation of identified leakage carrying out early warning; Meanwhile, because float type flow meter design is comparatively simple, the requirements such as antidetonation cannot be met.
Summary of the invention
The object of the invention is to: provide a kind of when nuclear power station operational process occur can not identified leakage, by judging whether leak rate exceedes the early warning value preset, judging that leak rate exceedes the early warning value preset, send early warning information to master control system, can realize in nuclear power station operational process can not the early warning of identified leakage.
In order to realize foregoing invention object, the invention provides a kind of nuclear power station can not the method for early warning of identified leakage, and it comprises:
Digitizer Ore-controlling Role DCS receives the liquid level change information that continuous coverage liquid level gauge sends;
DCS determines according to described liquid level change information can not the leak rate of identified leakage;
DCS judges whether described leak rate exceedes the early warning value preset;
If judge, described leak rate exceedes the early warning value preset, and sends early warning information to master control system.
As nuclear power station of the present invention can not identified leakage method for early warning one improve, described method also comprises:
Described master control system according to described early warning information determine described can not the source of leaks of identified leakage.
Can not the one of method for early warning of identified leakage improve as nuclear power station of the present invention, described digitizer Ore-controlling Role connects before DCS receives the liquid level change information that continuous coverage liquid level gauge sends, and also comprises:
Described continuous coverage liquid level gauge to measure when nuclear power station normally runs hydrophobic hole liquid level situation of change and occur can not identified leakage time hydrophobic hole liquid level situation of change.
As nuclear power station of the present invention can not identified leakage method for early warning one improve, described method also comprises:
Described continuous coverage liquid level gauge according to hydrophobic hole liquid level situation of change during described normal operation and occur can not identified leakage time hydrophobic hole liquid level situation of change, when definite kernel power station is normally run hydrophobic hole liquid level rate of change and occur can not identified leakage time hydrophobic hole liquid level rate of change.
As nuclear power station of the present invention can not identified leakage method for early warning one improve, described method also comprises:
In hydrophobic hole, pump is set, described continuous coverage liquid level gauge according to hydrophobic hole liquid level situation of change during described normal operation and/or occur can not identified leakage time hydrophobic hole liquid level situation of change, determine whether to start pump drainage; Or,
Described continuous coverage liquid level gauge according to hydrophobic hole liquid level situation of change during described normal operation and/or occur can not identified leakage time hydrophobic hole liquid level situation of change, determine whether to stop pump drainage.
As nuclear power station of the present invention can not identified leakage method for early warning one improve, described method also comprises:
Described continuous coverage liquid level gauge adopts differential pressure measurement mode to measure.
Can not the one of method for early warning of identified leakage improve as nuclear power station of the present invention, described DCS determines according to described liquid level change information can not the leak rate of identified leakage, comprising:
Described DCS according to hydrophobic hole liquid level rate of change during described normal operation and occur can not identified leakage time hydrophobic hole liquid level rate of change, determining in conjunction with hydrophobic hole sectional area can not the leak rate of identified leakage.
As nuclear power station of the present invention can not identified leakage method for early warning one improve, described method also comprises:
Described early warning value is set to 1GPM, if judge, described leak rate is more than 1GPM, sends early warning information to master control system.
In order to realize foregoing invention object, present invention also offers a kind of nuclear power station can not the early warning system of identified leakage, and it comprises:
Continuous coverage liquid level gauge, for sending hydrophobic hole liquid level change information;
Digitizer Ore-controlling Role DCS, for the liquid level change information that the described continuous measurement liquid level gauge of the company of reception sends, determining according to described liquid level change information can not the leak rate of identified leakage; Judge whether described leak rate exceedes the early warning value preset, if judge, described leak rate exceedes the early warning value preset, and sends early warning information to master control system.
As nuclear power station of the present invention can not identified leakage early warning system one improve, described system also comprises:
Described master control system, for determine according to described early warning information described can not the source of leaks of identified leakage.
Can not the one of early warning system of identified leakage improve as nuclear power station of the present invention, described continuous coverage liquid level gauge also for: to measure when nuclear power station normally runs hydrophobic hole liquid level situation of change and occur can not identified leakage time hydrophobic hole liquid level situation of change.
As nuclear power station of the present invention can not identified leakage early warning system one improve, described continuous coverage liquid level gauge also for: according to hydrophobic hole liquid level situation of change during described normal operation and occur can not identified leakage time hydrophobic hole liquid level situation of change, when definite kernel power station is normally run hydrophobic hole liquid level rate of change and occur can not identified leakage time hydrophobic hole liquid level rate of change.
As nuclear power station of the present invention can not identified leakage early warning system one improve, described system also comprises: unwatering pump, for being discharged by the water in hydrophobic hole;
Described continuous coverage liquid level gauge, also for according to hydrophobic hole liquid level situation of change during described normal operation and/or occur can not identified leakage time hydrophobic hole liquid level situation of change, determine whether to start pump drainage; Or,
Described continuous coverage liquid level gauge, also for according to hydrophobic hole liquid level situation of change during described normal operation and/or occur can not identified leakage time hydrophobic hole liquid level situation of change, determine whether to stop pump drainage.
Plant nuclear power station as the present invention can not the one of early warning system of identified leakage improve, described continuous coverage liquid level gauge adopts differential pressure measurement mode to measure.
As nuclear power station of the present invention can not identified leakage early warning system one improve, described DCS according to hydrophobic hole liquid level rate of change during described normal operation and occur can not identified leakage time hydrophobic hole liquid level rate of change, determining in conjunction with hydrophobic hole sectional area can not the leak rate of identified leakage.
As nuclear power station of the present invention can not identified leakage early warning system one improve, described system also comprises:
Described early warning value is set to 1GPM, if judge, described leak rate is more than 1GPM, sends early warning information to master control system.
Compared with prior art, the present invention is based on nuclear power station and the method for early warning of identified leakage and system can not have following Advantageous Effects: continuous coverage liquid level gauge is by sending liquid level change information to DCS, according to liquid level change information, DCS is judging whether leak rate exceedes the early warning value preset, judging that leak rate exceedes the early warning value preset, sending early warning information to master control system.Achieve nuclear power station run in occur can not identified leakage time, send early warning information in time; Meanwhile, because antidetonation 1 base part selected by continuous coverage liquid level gauge, meet safe shutdown earthquake (SafetyShutdownEarthquake, SSE) requirement, obtain good technique effect.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, a kind of nuclear power station of the present invention can not the method for early warning of identified leakage and system be described in detail, in accompanying drawing:
Fig. 1 provides nuclear power station of the present invention can not the process flow diagram of an embodiment of method for early warning of identified leakage.
Fig. 2 provides nuclear power station of the present invention can not the process flow diagram of another embodiment of method for early warning of identified leakage.
Fig. 3 provides nuclear power station of the present invention can not the process flow diagram of another embodiment of method for early warning of identified leakage.
Fig. 4 provides nuclear power station of the present invention can not the schematic diagram of an embodiment of early warning system of identified leakage.
Embodiment
In order to make goal of the invention of the present invention, technical scheme and Advantageous Effects thereof more clear, below in conjunction with the drawings and specific embodiments, the present invention is further elaborated.Should be understood that, the embodiment described in this instructions is only used to explain the present invention, is not intended to limit the present invention.
China's nuclear power is faced with fast-developing situation, AP1000 and CPR1000 unit is two kinds of main technical schemes that short-term construction nuclear power plant of China adopts.Under assessment design basis accident operating mode can not the consequence of identified leakage, it is one of important content of nuclear power plant's environmental impact assessment and safety analysis, can not the monitoring of identified leakage to PWR nuclear power plant primary Ioops, adopt the monitoring that the method measuring reactor building hydrophobic hole liquid level realizes leaking.Principle is: when primary Ioops occur can not identified leakage time, primary Ioops cooling medium will enter in containment with two kinds of forms, one is gaseous form (is vaporizated into steam, is finally condensed into water), and another kind is in liquid form (by gravity to hydrophobic hole).Under the effect that the steam of gaseous state cools in ventilating system, condensation the most at last, the hydrophobic hole of reactor building collected by the condensate water coil pipe through ventilating system; The floor drain that liquid water is arranged by factory building inside, also will finally collect same hydrophobic hole.
Please refer to shown in Fig. 1, Fig. 1 provides a kind of nuclear power station can not the method for early warning of identified leakage, specifically comprises:
Step 101, digitizer Ore-controlling Role DCS receives the liquid level change information that continuous coverage liquid level gauge sends.
In step 101 digitizer Ore-controlling Role (DigitalControlSystem, DCS) before receiving the liquid level change information that continuous coverage liquid level gauge sends, continuous coverage liquid level gauge to measure when nuclear power station normally runs hydrophobic hole liquid level situation of change and occur can not identified leakage time hydrophobic hole liquid level situation of change.Continuous coverage liquid level gauge according to hydrophobic hole liquid level situation of change during normal operation and occur can not identified leakage time hydrophobic hole liquid level situation of change, when definite kernel power station is normally run hydrophobic hole liquid level rate of change and occur can not identified leakage time hydrophobic hole liquid level rate of change.
Concrete, the water source in hydrophobic hole, mainly from 3 aspects, comprising: run the hydrophobic and ventilating system condensate water of overflow water, floor drain.Hydrophobic hole is provided with pump and liquid level gauge, and liquid level gauge can comprise the continuous coverage liquid level gauge and level switch that possess continuous coverage function.
Nuclear power station normal operation period, the water source in hydrophobic hole only has operation overflow water, and according to operating experience, the amount running overflow water is normally constant, or approximately constant.When the liquid level in hydrophobic hole exceedes high level set value H1, will pump be started, and unnecessary water be discharged other process system, is generally liquid waste treatment system; When the liquid level in hydrophobic hole is lower than low level set value L1, by termination of pumping.In this period t1, the change △ L1=H1-L1 of liquid level.Hydrophobic hole liquid level change curve slope k 1=△ L1/t1, hydrophobic hole liquid level rate of change when namely normally running.
When there is unrecognizable leakage, due to ventilating system condensate water with floor drain is hydrophobic also enters hydrophobic hole, then the change of hydrophobic hole liquid level is faster, in this period t2, hydrophobic hole liquid level change curve slope is k2=△ L2/t2, △ k=k1-k2, namely occur can not identified leakage time hydrophobic hole liquid level rate of change.
Optionally, pump is set in hydrophobic hole, continuous coverage liquid level gauge according to hydrophobic hole liquid level situation of change during normal operation and/or occur can not identified leakage time hydrophobic hole liquid level situation of change, determine whether to start pump drainage.Such as, if find, k1 and k2 difference is comparatively large, can start pump drainage, and open level switch.
Or, continuous coverage liquid level gauge according to hydrophobic hole liquid level situation of change during normal operation and/or occur can not identified leakage time hydrophobic hole liquid level situation of change, determine whether to stop pump drainage.Such as, if find, k1 and k2 is more or less the same, and can stop pump drainage, and close level switch.
Step 103, DCS determines according to liquid level change information can not the leak rate of identified leakage.
DCS according to hydrophobic hole liquid level rate of change during normal operation and occur can not identified leakage time hydrophobic hole liquid level rate of change, determining in conjunction with hydrophobic hole sectional area can not the leak rate of identified leakage.Leak rate=(k2-k1) xS, wherein, S hydrophobic hole sectional area.
Step 105, DCS judges whether leak rate exceedes the early warning value preset.
Optionally, early warning value is set to 1 gallons per minute (GallonsPerMinute, GPM).
Step 107, if judge, leak rate exceedes the early warning value preset, and sends early warning information to master control system.
If judge, leak rate is greater than early warning value 1GPM, sends early warning information to master control system.
Optionally, determine according to early warning information can not the source of leaks of identified leakage for master control system.
Further, continuous coverage liquid level gauge adopts differential pressure measurement mode to measure.Concrete, by the metering system of differential pressure, high-pressure side is hydrophobic bottom hole pressure power, and low-pressure side is atmospheric pressure, and its pressure reduction is Δ P, and so liquid level is Δ P/ (ρ xg), and wherein, ρ is the density of water, and g is acceleration of gravity.
Further, the type selecting of continuous coverage liquid level gauge should meet the requirement that I&C system Measuring Time is less than 1 hour.The hydrophobic hole liquid level that liquid level gauge can accurately identify is changed to: AxHxS, and unit is l; If 1GPM can not enter hydrophobic hole by identified leakage, then its response time is: (AxHxS)/3.8, and unit is min.When (AxHxS)/3.8 are less than 60min, then think that this instrument system meets the requirement of RG1.45 about the response time; When (AxHxS)/3.8 are greater than 60min, then think that this instrument system does not meet the requirement of RG1.45 about the response time.Wherein, the full range that the precision that A is continuous coverage liquid level gauge, H are continuous coverage liquid level gauge, S is the sectional area in hydrophobic hole.
Due to instrument signal transmission and the DCS processing time extremely short, therefore ignore.
In the embodiment of the present invention, continuous coverage liquid level gauge is by sending liquid level change information to DCS, according to liquid level change information, DCS is judging whether leak rate exceedes the early warning value preset, judging that leak rate exceedes the early warning value preset, early warning information is sent to master control system, can realize nuclear power station run in occur can not identified leakage time, send early warning information in time; Meanwhile, because antidetonation 1 base part selected by continuous coverage liquid level gauge, meet safe shutdown earthquake SSE requirement, obtain good technique effect.
Incorporated by reference to referring to shown in Fig. 2, Fig. 2 provides a kind of nuclear power station can not the schematic diagram of an embodiment of method for early warning of identified leakage, the specifically monitoring principle of hydrophobic hole liquid level.As previously mentioned, the water source in hydrophobic hole, mainly from 3 aspects, comprising: run the hydrophobic and ventilating system condensate water of overflow water, floor drain.Hydrophobic hole is provided with 2 pumps and liquid level gauge, and liquid level gauge can comprise the continuous coverage liquid level gauge and level switch that possess continuous coverage function.
Nuclear power station normal operation period, the water source in hydrophobic hole only has operation overflow water, and according to operating experience, the amount running overflow water is normally constant, or approximately constant.When the liquid level in hydrophobic hole exceedes high level set value H1, by startup 01 pump, unnecessary water is discharged other process system, is generally liquid waste treatment system; When the liquid level in hydrophobic hole is lower than low level set value L1,01 pump will be stopped.In this period t1, the change △ L1=H1-L1 of liquid level.Hydrophobic hole liquid level change curve slope k 1=△ L1/t1, hydrophobic hole liquid level rate of change when namely normally running.
When there is unrecognizable leakage and being less, due to ventilating system condensate water with floor drain is hydrophobic also enters hydrophobic hole, then the change of hydrophobic hole liquid level is very fast, in this period t2, hydrophobic hole liquid level change curve slope is k2=△ L2/t2, namely occur can not identified leakage time hydrophobic hole liquid level rate of change.
When unrecognizable leakage occurring being larger, when the liquid level in hydrophobic hole exceedes high level set value H1, after starting 01 pump, liquid level continues to be increased beyond high two of setting when adding liquid level H2, by startup 02 pump, when liquid level is down to L1, closes 01 pump and 02 pump simultaneously.
Incorporated by reference to referring to shown in Fig. 3, Fig. 3 provides a kind of nuclear power station can not the schematic diagram of an embodiment of method for early warning of identified leakage.Concrete, provide a kind of Computing Principle of leak rate.Nuclear power station normal operation period, the water source in hydrophobic hole only has operation overflow water, and according to operating experience, the amount running overflow water is normally constant, or approximately constant.When the liquid level in hydrophobic hole exceedes high level set value H1, by startup 01 pump, unnecessary water is discharged other process system, is generally liquid waste treatment system; When the liquid level in hydrophobic hole is lower than low level set value L1,01 pump will be stopped.In this period t1, the change △ L1=H1-L1 of liquid level.Hydrophobic hole liquid level change curve slope k 1=△ L1/t1, hydrophobic hole liquid level rate of change when namely normally running.
When there is unrecognizable leakage and being less, due to ventilating system condensate water with floor drain is hydrophobic also enters hydrophobic hole, then the change of hydrophobic hole liquid level is very fast, in this period t2, hydrophobic hole liquid level change curve slope is k2=△ L2/t2, namely occur can not identified leakage time hydrophobic hole liquid level rate of change.Wherein, the leak rate of this period is: (k2-k1) xS, and wherein, S is hydrophobic hole sectional area.
When unrecognizable leakage occurring being larger, when the liquid level in hydrophobic hole exceedes high level set value H1, after starting 01 pump, liquid level continues to be increased beyond high two of setting when adding liquid level H2, by startup 02 pump, when liquid level is down to L1, closes 01 pump and 02 pump simultaneously.According to above-mentioned principle, the slope that continuous coverage liquid level gauge obtains the hydrophobic hole liquid level ascent stage is respectively k3 and k4.Wherein, the leak rate of this period is (k3-k1) xS, and wherein, S is hydrophobic hole sectional area.
Incorporated by reference to referring to shown in Fig. 4, Fig. 4 provides a kind of nuclear power station can not the schematic diagram of an embodiment of early warning system of identified leakage, and it comprises: continuous coverage liquid level gauge 401, digitizer Ore-controlling Role DCS403.Wherein,
Continuous coverage liquid level gauge 401, for sending hydrophobic hole liquid level change information.
Digitizer Ore-controlling Role DCS403, for receiving the liquid level change information that continuous coverage liquid level gauge 401 sends, determining according to liquid level change information can not the leak rate of identified leakage; Judge whether leak rate exceedes the early warning value preset, if judge, leak rate exceedes the early warning value preset, and sends early warning information to master control system.
Concrete, the water source in hydrophobic hole, mainly from 3 aspects, comprising: run overflow water, the hydrophobic and ventilating system condensate water of floor drain.Hydrophobic hole is provided with pump and liquid level gauge, and this liquid level gauge can comprise the continuous coverage liquid level gauge 401 and level switch that possess continuous coverage function.
Nuclear power station normal operation period, the water source in hydrophobic hole only has operation overflow water, and according to operating experience, the amount running overflow water is normally constant, or approximately constant.When the liquid level in hydrophobic hole exceedes high level set value H1, will pump be started, and unnecessary water be discharged other process system, is generally liquid waste treatment system; When the liquid level in hydrophobic hole is lower than low level set value L1, by termination of pumping.In this period t1, the change △ L1=H1-L1 of liquid level measured by continuous coverage liquid level gauge 401.Hydrophobic hole liquid level change curve slope k 1=△ L1/t1, hydrophobic hole liquid level rate of change when namely normally running.
When there is unrecognizable leakage, due to ventilating system condensate water with floor drain is hydrophobic also enters hydrophobic hole, then the change of hydrophobic hole liquid level is faster, in this period t2, hydrophobic hole liquid level change curve slope measured by continuous coverage liquid level gauge 401 is k2=△ L2/t2, △ k=k1-k2, namely occur can not identified leakage time hydrophobic hole liquid level rate of change.
Optionally, pump is set in hydrophobic hole, continuous coverage liquid level gauge 401 according to hydrophobic hole liquid level situation of change during normal operation and/or occur can not identified leakage time hydrophobic hole liquid level situation of change, determine whether to start pump drainage.Such as, if find, k1 and k2 difference is comparatively large, can start pump drainage, and level switch is opened in instruction.
Or, continuous coverage liquid level gauge 401 according to hydrophobic hole liquid level situation of change during normal operation and/or occur can not identified leakage time hydrophobic hole liquid level situation of change, determine whether to stop pump drainage.Such as, if find, k1 and k2 is more or less the same, and can stop pump drainage, and level switch is closed in instruction.
DCS403 according to hydrophobic hole liquid level rate of change during described normal operation and occur can not identified leakage time hydrophobic hole liquid level rate of change, determining in conjunction with hydrophobic hole sectional area can not the leak rate of identified leakage.Leak rate=(k2-k1) xS, wherein, S hydrophobic hole sectional area.
Optionally.In DCS403, early warning value is set to 1 gallons per minute (GallonsPerMinute, GPM), if judge, described leak rate is greater than early warning value 1GPM, sends early warning information to master control system.
Optionally, the early warning system of identified leakage also can not comprise master control system based on nuclear power station, for determine according to described early warning information described can not the source of leaks of identified leakage.
Optionally, such scheme and system, its principle can apply to the monitoring of containment air F-18 aerocolloidal activity concentration and early warning scheme, equally to the monitoring of containment inert atmosphere Activity of radioactive gas concentration and early warning scheme, to the steam extraction of main pipeline leakage and the monitoring of analysis and early warning scheme and to the humidity detection of main pipeline and early warning scheme.
The implementation method of system and flow process see the embodiment of the method introduced in previous embodiment, can repeat no more herein.
Can find out in conjunction with above detailed description of the present invention, relative to prior art, the present invention at least has following Advantageous Effects: continuous coverage liquid level gauge is by sending liquid level change information to DCS, according to liquid level change information, DCS is judging whether leak rate exceedes the early warning value preset, judging that early warning value exceedes the early warning value preset, sending early warning information to master control system.Achieve nuclear power station run in occur can not identified leakage time, send early warning information in time; Meanwhile, because antidetonation 1 base part selected by continuous coverage liquid level gauge, meet safe shutdown earthquake (SafetyShutdownEarthquake, SSE) requirement, obtain good technique effect.
According to above-mentioned principle, the present invention can also carry out suitable change and amendment to above-mentioned embodiment.Therefore, the present invention is not limited to embodiment disclosed and described above, also should fall in the protection domain of claim of the present invention modifications and changes more of the present invention.In addition, although employ some specific terms in this instructions, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (14)
1. nuclear power station can not the method for early warning of identified leakage, and it is characterized in that, described method comprises:
Continuous coverage liquid level gauge measure nuclear power station when normally running hydrophobic hole liquid level situation of change and occur can not identified leakage time hydrophobic hole liquid level situation of change;
Digitizer Ore-controlling Role DCS receives the liquid level change information that continuous coverage liquid level gauge sends;
DCS determines according to described liquid level change information can not the leak rate of identified leakage;
DCS judges whether described leak rate exceedes the early warning value preset;
If judge, described leak rate exceedes the early warning value preset, and sends early warning information to master control system.
2. method according to claim 1, is characterized in that, described method also comprises:
Described master control system according to described early warning information determine described can not the source of leaks of identified leakage.
3. method according to claim 1, is characterized in that, described method also comprises:
Described continuous coverage liquid level gauge according to hydrophobic hole liquid level situation of change during described normal operation and occur can not identified leakage time hydrophobic hole liquid level situation of change, when definite kernel power station is normally run hydrophobic hole liquid level rate of change and occur can not identified leakage time hydrophobic hole liquid level rate of change.
4. method according to claim 3, is characterized in that, described method also comprises:
In hydrophobic hole, pump is set, described continuous coverage liquid level gauge according to hydrophobic hole liquid level situation of change during described normal operation and/or occur can not identified leakage time hydrophobic hole liquid level situation of change, determine whether to start pump drainage; Or,
Described continuous coverage liquid level gauge according to hydrophobic hole liquid level situation of change during described normal operation and/or occur can not identified leakage time hydrophobic hole liquid level situation of change, determine whether to stop pump drainage.
5. method according to any one of claim 1 to 4, is characterized in that, described method also comprises:
Described continuous coverage liquid level gauge adopts differential pressure measurement mode to measure.
6. method according to claim 3, is characterized in that, described DCS determines according to described liquid level change information can not the leak rate of identified leakage, comprising:
Described DCS according to hydrophobic hole liquid level rate of change during described normal operation and occur can not identified leakage time hydrophobic hole liquid level rate of change, determining in conjunction with hydrophobic hole sectional area can not the leak rate of identified leakage.
7. the method according to claim 6 or 1, is characterized in that, described method also comprises:
Described early warning value is set to 1GPM, if judge, described leak rate is more than 1GPM, sends early warning information to master control system.
8. nuclear power station can not the early warning system of identified leakage, and it is characterized in that, described system comprises:
Continuous coverage liquid level gauge, for measure when nuclear power station normally runs hydrophobic hole liquid level situation of change and occur can not identified leakage time hydrophobic hole liquid level situation of change and send hydrophobic hole liquid level change information;
Digitizer Ore-controlling Role DCS, for the liquid level change information that the described continuous measurement liquid level gauge of the company of reception sends, determining according to described liquid level change information can not the leak rate of identified leakage; Judge whether described leak rate exceedes the early warning value preset, if judge, described leak rate exceedes the early warning value preset, and sends early warning information to master control system.
9. nuclear power station according to claim 8 can not the early warning system of identified leakage, and it is characterized in that, described system also comprises:
Described master control system, for determine according to described early warning information described can not the source of leaks of identified leakage.
10. nuclear power station according to claim 8 can not the early warning system of identified leakage, it is characterized in that,
Described continuous coverage liquid level gauge also for: according to hydrophobic hole liquid level situation of change during described normal operation and occur can not identified leakage time hydrophobic hole liquid level situation of change, when definite kernel power station is normally run hydrophobic hole liquid level rate of change and occur can not identified leakage time hydrophobic hole liquid level rate of change.
11. nuclear power stations according to claim 10 can not the early warning system of identified leakage, and it is characterized in that, described system also comprises: unwatering pump, for being discharged by the water in hydrophobic hole;
Described continuous coverage liquid level gauge, also for according to hydrophobic hole liquid level situation of change during described normal operation and/or occur can not identified leakage time hydrophobic hole liquid level situation of change, determine whether to start pump drainage; Or,
Described continuous coverage liquid level gauge, also for according to hydrophobic hole liquid level situation of change during described normal operation and/or occur can not identified leakage time hydrophobic hole liquid level situation of change, determine whether to stop pump drainage.
Nuclear power station according to any one of 12. according to Claim 8 to 11 can not the early warning system of identified leakage, and it is characterized in that, described continuous coverage liquid level gauge adopts differential pressure measurement mode to measure.
13. nuclear power stations according to claim 10 can not the early warning system of identified leakage, it is characterized in that,
Described DCS determines according to described liquid level change information can not the leak rate of identified leakage, comprising:
Described DCS according to hydrophobic hole liquid level rate of change during described normal operation and occur can not identified leakage time hydrophobic hole liquid level rate of change, determining in conjunction with hydrophobic hole sectional area can not the leak rate of identified leakage.
Nuclear power station described in 14. according to Claim 8 or 13 can not the early warning system of identified leakage, and it is characterized in that, described system also comprises:
Described early warning value is set to 1GPM, if judge, described leak rate is more than 1GPM, sends early warning information to master control system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310330453.6A CN103400612B (en) | 2013-07-26 | 2013-07-26 | Nuclear power station can not the method for early warning of identified leakage and system |
Applications Claiming Priority (1)
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| CN105425842B (en) * | 2016-01-06 | 2017-12-29 | 北京化工大学 | A kind of mechanical seal leakage rate online monitoring system |
| CN108281207B (en) * | 2018-01-26 | 2021-11-16 | 中国核电工程有限公司 | Device and method for detecting unidentifiable leakage in containment |
| EP3905263A4 (en) * | 2018-12-11 | 2022-09-14 | China Nuclear Power Engineering Co., Ltd. | Nuclear power plant leakage monitoring alarm method and alarm system |
| CN109637680B (en) * | 2018-12-11 | 2022-10-11 | 中广核工程有限公司 | Nuclear power station leakage monitoring alarm method and alarm system |
| CN110243428A (en) * | 2019-04-29 | 2019-09-17 | 苏州热工研究院有限公司 | Liquid level shakes dynamic height assessment system and its working method under nuclear power station liquid reserve tank earthquake |
| CN114038592B (en) * | 2021-10-12 | 2024-03-15 | 中广核陆丰核电有限公司 | Nuclear power plant primary loop leakage rate monitoring method and device |
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| US4368694A (en) * | 1981-05-21 | 1983-01-18 | Combustion Engineering, Inc. | Leak detection system for a steam generator |
| CN102163051A (en) * | 2010-12-10 | 2011-08-24 | 中国广东核电集团有限公司 | Digital control method and system of primary circuit hydrostatic test of pressurized water reactor nuclear power station |
| CN102426866A (en) * | 2011-11-03 | 2012-04-25 | 中广核工程有限公司 | Monitoring method and system for leakage at pressure boundary of primary coolant system in nuclear power station |
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