CN107967952A - Gas concentration monitoring system and monitoring method in containment after reactor disaster - Google Patents
Gas concentration monitoring system and monitoring method in containment after reactor disaster Download PDFInfo
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- CN107967952A CN107967952A CN201711023725.2A CN201711023725A CN107967952A CN 107967952 A CN107967952 A CN 107967952A CN 201711023725 A CN201711023725 A CN 201711023725A CN 107967952 A CN107967952 A CN 107967952A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/003—Remote inspection of vessels, e.g. pressure vessels
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/017—Inspection or maintenance of pipe-lines or tubes in nuclear installations
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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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- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention belongs to nuclear safety control technology field, it is related to after reactor disaster gas concentration monitoring system and monitoring method in containment.The monitoring system includes the sampling probe being placed in containment, sensitive solenoid valve, the first air accumulator, the second air accumulator, gas parameter measuring system, high pressure inert gas tank control system, high pressure inert gas tank, gas condenser system, density of hydrogen analyzer, the measured oxygen concentration analyzer being placed in outside containment, and each connecting pipeline.Using the monitoring system and monitoring method of the present invention, can more effectively, it is accurate, safely and conveniently carry out after reactor disaster monitoring in real time for gas concentration in containment.
Description
Technical field
The invention belongs to nuclear safety control technology field, it is related to gas concentration monitoring in containment after reactor disaster
System and monitoring method.
Background technology
After Fukushima Nuclear Power Accident, State Bureau of Nuclear Safety has been organized to building the thorough examination with in-service nuclear power plant, then issue
It is correspondingly improved requirement.Improve and specify that after reactor disaster to be controlled combustion of hydrogen in containment in requiring and fire
Risk, and after reactor disaster the measurement of concentration of hydrogen in containment vessel be carry out Hydrogen risk control precondition.
If localized hydrogen gas concentration reaches 4% explosion limit and there is the risk fired in containment after major accident.Therefore, in order to
Avoid such situation for threatening to containment integrity from occurring and built, it is necessary to design after major accident in npp safety shell
Gas concentration monitoring system including density of hydrogen, so as to reach to gas concentration in containment, especially density of hydrogen
The purpose monitored in real time.
Gas concentration in containment after major accident, especially density of hydrogen monitoring be Severe accident management it is important before
Carry, due to environmental condition very severe in containment after major accident, such as high temperature, high pressure, high radioactivity and molten containing a large amount of gas
Glue, therefore gas concentration monitors in containment, especially density of hydrogen monitoring is always the outer nuclear power technology research of Now Domestic
Difficult point.Nuclear power plant produces hydrogen because of reasons such as water irradiation decomposition, cooling agent leakages in the process of running, particularly in major accident
Afterwards, the zirconium metal in fuel can and reactor core melts and containment after the reaction of the cooling agent of high temperature and pressure, Lower head failure
Underplate concrete reaction (MCCI) etc. can produce a large amount of hydrogen.
Since reactor can produce a large amount of hydrogen and heat and be discharged into containment after major accident, uncontrolled
Under conditions of, average hydrogen concentration meets or exceeds explosion limit in containment, therefore, real by gas concentration monitoring system
Now to after major accident it is particularly important that the monitored over time of density of hydrogen.
Gas concentration monitoring system is based primarily upon pumping outside containment in containment after the major accident of nuclear power plant's application at present
Gas samples and two kinds of principles is directly measured in containment.Wherein, French EPR employs the outer air suction sampling method of containment, the U.S.
AP1000 and Russia VVER employ the direct method of measurement in containment.It is measuring system the advantages of the direct method of measurement in containment
Relatively easy, the measurement response time is short, gas sensor only need to be installed in containment, then signal is reached cabinet by cable
；But it is also obvious that i.e. gas sensor high temperature, high pressure, height after major accident the shortcomings that the direct method of measurement in containment
Performance is difficult to obtain guarantee under radioactivity and environmental condition containing a large amount of aerosols, its signal transmission is also limited by cable.And
Hydrogen combustibility is together decided on by hydrogen, oxygen and water vapor concentration in containment after major accident, therefore gas concentration
Monitoring system also needs to monitor the concentration of oxygen and vapor at the same time.Since the relevant device for measuring gas component is put in containment
It is outer to be more conducive to periodically carry out calibration maintenance, therefore, using gas concentration monitoring is in the containment of air suction sampling method outside containment
System has more preferable feasibility.
The content of the invention
The primary and foremost purpose of the present invention is to provide after reactor disaster gas concentration monitoring system in containment, so as to
More effectively, the real-time monitoring of gas concentration in containment after reactor disaster accurately, is safely and conveniently carried out.
In order to achieve this, in the embodiment on basis, gas in containment after present invention offer reactor disaster
Bulk concentration monitors system, and the monitoring system includes the sampling probe being placed in containment, the sensitive electricity being placed in outside containment
Magnet valve, the first air accumulator, the second air accumulator, gas parameter measuring system, high pressure inert gas tank control system, high pressure inert gas
Tank, gas condenser system, density of hydrogen analyzer, measured oxygen concentration analyzer, and each connecting pipeline：
Gas sampled of the sampling probe in containment enters first air accumulator by connecting pipeline；
Gas sampled in first air accumulator can successively be entered by connecting pipeline the gas condenser system,
Second air accumulator；
Described first that the high pressure inert gas tank control system is measured according to the gas parameter measuring system
The water vapour content of gas sampled in air accumulator, controls the high pressure inert gas tank (its interior pressure is higher than 0.5MPa) to institute
The the second air accumulator compensation nitrogen or inert gas stated；
Gas sampled in second air accumulator can successively be entered the density of hydrogen by connecting pipeline and be measured
Analyzer, measured oxygen concentration analyzer, to carry out the measurement of density of hydrogen and oxygen concentration analysis respectively；
On containment outer portion of the connection sampling probe with the connecting pipeline of first air accumulator, and
Connection first air accumulator with the connecting pipeline of the gas condenser system, be connected described in the second air accumulator and
High pressure inert gas tank and second air accumulator in the connecting pipeline of the density of hydrogen analyzer, described in connection
Connecting pipeline on be both provided with the sensitive solenoid valve.
In a preferred embodiment, gas concentration monitoring in containment after present invention offer reactor disaster
System, wherein the monitoring system further includes the mechanical penetration piece being arranged on the containment, the connecting pipeline
The sampling probe described through the mechanical penetration piece connection and first air accumulator.
In a preferred embodiment, gas concentration monitoring in containment after present invention offer reactor disaster
System, is arranged in the containment, the filtration apparatus outside the sampling probe wherein the monitoring system further includes,
For being filtered to gas sampled.
In a kind of more preferred embodiment, gas concentration in containment after present invention offer reactor disaster
Monitoring system, wherein the filtration apparatus carries blue stone cotton fiber or ultra-fine fibre glass material, can effectively remove and be taken
Aerosol in sample gas.
In a preferred embodiment, gas concentration monitoring in containment after present invention offer reactor disaster
System, wherein the monitoring system further includes the waterproof cover being arranged on outside the sampling probe, is opened to avoid spray system
Vapor condenses on the sampling probe after dynamic, and enters air suction sampling diagonally downward.
In a preferred embodiment, gas concentration monitoring in containment after present invention offer reactor disaster
System, wherein the sampling probe is multiple, the diverse location being distributed in the containment.
In a preferred embodiment, gas concentration monitoring in containment after present invention offer reactor disaster
System, wherein the monitoring system further includes the connection for being arranged on the connection sampling probe and first air accumulator
Flow control valve on the containment outer portion of pipeline.
In a preferred embodiment, gas concentration monitoring in containment after present invention offer reactor disaster
System, wherein the monitoring system further includes condensed water collecting box, it passes through the another way connecting pipeline connection gas
Condenser system, for collecting the condensed water produced after the gas condenser system condensation.
In a kind of more preferred embodiment, gas concentration in containment after present invention offer reactor disaster
Monitoring system, wherein the monitoring system, which further includes, is arranged on the connection gas condenser system and the condensed water receipts
Sensitive solenoid valve in the connecting pipeline of header.
In a preferred embodiment, gas concentration monitoring in containment after present invention offer reactor disaster
System, wherein the monitoring system further includes valve control system, warning device, high-pressure pump,
The gas sampled that water vapor concentration, density of hydrogen and oxygen concentration have been analyzed in measurement is successively passed through by connecting pipeline
By the sensitive solenoid valve, the high-pressure pump of the valve control system control opening and closing, to be applied by the high-pressure pump
Power is added to send gas sampled back in the containment；
When the measured value presence of water vapor concentration, density of hydrogen and oxygen concentration can make combustion of hydrogen and the risk fired
When, by the warning device determine it is risky in the case of alarm, determine devoid of risk in the case of without report
It is alert.
In a preferred embodiment, gas concentration monitoring in containment after present invention offer reactor disaster
System, wherein the density of hydrogen analyzer is internally provided with the metal rotary disk of constant temperature, the metal rotary disk is divided
For some, every is placed with hydrogen-absorbing material；The metal rotary disk is rotated by control system, the automatically replaceable suction
Hydrogen material.
In a kind of more preferred embodiment, gas concentration in containment after present invention offer reactor disaster
Monitoring system, wherein control system inhale the increased resistance value of circuit after hydrogen according to the hydrogen-absorbing material, make the metal
Turntable rotation.
In a preferred embodiment, gas concentration monitoring in containment after present invention offer reactor disaster
System, wherein the connecting pipeline outside diameter is 6-8mm, internal diameter 3-5mm, scribbles lead metal or nano silver material in pipe, makes
The connecting pipeline has radiation resistance.
In a preferred embodiment, gas concentration monitoring in containment after present invention offer reactor disaster
System, wherein the interior arrangement woven wire of connecting pipeline described in the part, to strengthen the cooling of pipeline center gas, makes described
Connecting pipeline there is high explosion-proof.
In a preferred embodiment, gas concentration monitoring in containment after present invention offer reactor disaster
System, wherein the monitoring system, which further includes signal, transmits cable, the measuring signal of hydrogen and oxygen concentration passes through described
Signal transmits cable transmission to control room, the signal and transmits cable surface and be coated with magnesia as insulating materials, magnesia
Surface, which is cased with the vapor that film avoids magnesia from absorbing in air, causes insulation to be lost.
Second object of the present invention is to provide monitoring system as described above and carries out after reactor disaster in containment
The monitoring method of gas concentration, so as to more effectively, accurately, safely and conveniently carrying out after reactor disaster in containment
The real-time monitoring of gas concentration.
In order to achieve this, in the embodiment on basis, the present invention provides monitoring system as described above and carries out reactor
After major accident in containment gas concentration monitoring method, the monitoring method includes the following steps：
(1) after reactor disaster, the connecting tube of the connection sampling probe and first air accumulator is opened
Several seconds of sensitive solenoid valve on line, so that the gas sampled of the sampling probe enters first air accumulator, sampling knot
The connection sampling probe and the sensitive solenoid valve in the connecting pipeline of first air accumulator are closed after beam；
(2) sampling that the high pressure inert gas tank control system described in is transmitted according to the gas parameter measuring system measurement
Pressure, temperature, the humidity information of gas, calculate water vapour content information, are converted into water vapor concentration, pass to the height
Inertia gas tank control system is pressed, then opens the connecting pipeline of the connection high pressure inert gas tank and second air accumulator
On several seconds of sensitive solenoid valve, nitrogen or inert gas are compensated to second gas storage by the high pressure inert gas tank
Tank；
(3) connection first air accumulator and the sensitive electromagnetism in the connecting pipeline of the gas condenser system are opened
Several seconds of valve, makes gas sampled enter second air accumulator by first air accumulator；
(4) connection second air accumulator and the spirit in the connecting pipeline of the density of hydrogen analyzer are opened
Quick solenoid valve, make gas sampled successively enter the density of hydrogen analyzer, measured oxygen concentration analyzer, respectively into
The measurement analysis of row density of hydrogen and oxygen concentration.
In a preferred embodiment, after the present invention provides monitoring system progress reactor disaster as described above
The monitoring method of gas concentration in containment, wherein the gas parameter measuring system is related by real gas in thermodynamics
Equation calculation water vapour content, and then obtain water vapor concentration.
In a preferred embodiment, after the present invention provides monitoring system progress reactor disaster as described above
The monitoring method of gas concentration in containment, wherein first air accumulator and second air accumulator are initially nearly vacuum
State (absolute pressure is not higher than 100Pa), to reduce the error of compensation nitrogen or amount of inert gas as far as possible.
In a preferred embodiment, after the present invention provides monitoring system progress reactor disaster as described above
The monitoring method of gas concentration in containment, wherein the gas condenser system uses activated carbon and anhydrous CuSO4Drying, subtract
Pressure valve is depressured and/or the mode of cold water casing cooling carries out gas condensation.
In a preferred embodiment, after the present invention provides monitoring system progress reactor disaster as described above
The monitoring method of gas concentration in containment, wherein the density of hydrogen analyzer is surveyed using the method for inhaling hydrogen infiltration type
Density of hydrogen (hydrogen is all absorbed in measurement process, reduces combustion of hydrogen and the risk fired in containment) is measured, it is described
Measured oxygen concentration analyzer using magnetic pressure type method measurement oxygen concentration.
In a preferred embodiment, after the present invention provides monitoring system progress reactor disaster as described above
The monitoring method of gas concentration in containment, wherein whole monitoring operations carry out all outside containment.
The beneficial effects of the present invention are monitored using gas concentration in containment after the reactor disaster of the present invention
System and monitoring method, can more effectively, it is accurate, safely and conveniently carry out after reactor disaster that gas is dense in containment
The real-time monitoring of degree.
Beneficial effects of the present invention are embodied in：
(1) the gas parameter measuring system that the present invention designs is steamed by the relevant equation calculation water of real gas in thermodynamics
Gas content, and then obtain water vapor concentration.High pressure inert gas tank control system measured according to gas parameter measuring system first
The water vapor concentration of gas sampled in air accumulator, control high pressure inert gas tank compensate nitrogen or indifferent gas to the second air accumulator
Body, makes compensation of the high pressure inert gas tank to removing vapor more effective, more accurate.
(2) the high pressure inert gas tank control system that the present invention designs makes high pressure inert gas tank compensate removal to the second air accumulator
Vapor, be more conducive to monitoring method realization, reduce hydrogen and oxygen concentration fly up the wind for causing to burn and firing
Danger, adds the reliability of monitoring system.
(3) density of hydrogen analyzer of the present invention is using the method measurement density of hydrogen for inhaling hydrogen infiltration type, root
The increased resistance value of circuit, rotates metal rotary disk by control system after according to hydrogen-absorbing material suction hydrogen, and automatic replace inhales hydrogen material
Material.The hydrogen in sampled gas can be effectively absorbed by hydrogen-absorbing material, avoids hydrogen from being returned again in containment, therefore is dropped
Combustion of hydrogen and the risk fired in containment after low major accident.
Brief description of the drawings
Fig. 1 is the composition of gas concentration monitoring system in containment after exemplary reactor disaster of the invention
Figure.
Fig. 2 is dense for hydrogen in gas concentration monitoring system in containment after exemplary reactor disaster of the invention
Spend the cut-away view of analyzer.
Embodiment
The embodiment of the present invention is further illustrated below in conjunction with attached drawing.
After exemplary reactor disaster of the invention in containment gas concentration monitoring system composition such as Fig. 1 institutes
Show, including filtration apparatus 1, the sampling probe 2 being placed in containment, be placed in sensitive solenoid valve 3a-3f outside containment, flow control
Valve 4 processed, the first air accumulator 5a, the second air accumulator 5b, gas parameter measuring system 6, high pressure inert gas tank control system 7, high pressure
Inertia gas tank 8, gas condenser system 9, condensed water collecting box 10, density of hydrogen analyzer 11, measured oxygen concentration analysis
Instrument 12, high-pressure pump 13, valve control system 14, warning device 15, and mechanical penetration piece (not shown), each connecting tube
Line and signal transmit cable (not shown).
Gas sampled of the sampling probe 2 in containment enters the first air accumulator 5a, the connecting pipeline by connecting pipeline
Through the mechanical penetration piece being arranged on containment.Sampling probe 2 is multiple, the diverse location being distributed in containment.Filtering
Device 1 is located at outside sampling probe 2, for being filtered to gas sampled.And filtration apparatus 1 carries blue stone cotton fiber or ultra-fine glass
Glass fibrous material, can effectively remove the aerosol in institute's gas sampled.Waterproof cover is also set up outside sampling probe 2 in containment,
Vapor condenses on sampling probe 2 after starting to avoid spray system, and enters air suction sampling diagonally downward.
Gas sampled in first air accumulator 5a carries out vapor into gas condenser system 9 by connecting pipeline cold
It is solidifying, enter back into the second air accumulator 5b.During water vapor condensation, high pressure inert gas tank control system 7 is surveyed according to gas parameter
The water vapor concentration for the gas sampled in the first air accumulator 5a that 6 survey calculation of amount system obtains, control high pressure inert gas tank 8
(its interior pressure is higher than 0.5MPa) compensates nitrogen or inert gas to the second air accumulator 5b.Condensed water collecting box 10 passes through another way
Connecting pipeline connection gas condenser system 9, for collecting the condensed water produced after gas condenser system 9 condenses, in this connecting tube
Sensitive solenoid valve 3f is provided with line.
Gas sampled in second air accumulator 5b can successively enter density of hydrogen analyzer 11, oxygen by connecting pipeline
Gas concentration analyzer 12, to carry out the measurement of density of hydrogen and oxygen concentration analysis respectively.
Density of hydrogen analyzer 11 is internally provided with the metal rotary disk of constant temperature, and metal rotary disk is divided into some, often
Bar is placed with hydrogen-absorbing material；Rotating metal rotary disk by control system, (control system inhales circuit after hydrogen according to hydrogen-absorbing material
Increased resistance value, rotates metal rotary disk), automatically replaceable hydrogen-absorbing material.
The measuring signal of hydrogen and oxygen concentration transmits cable transmission to control room, signal by signal and transmits cable surface
Magnesia is coated with as insulating materials, mgo surface, which is cased with the vapor that film avoids magnesia from absorbing in air, to be caused to insulate
Lose.
The gas sampled that water vapor concentration, density of hydrogen and oxygen concentration have been analyzed in measurement is successively passed through by connecting pipeline
By sensitive solenoid valve 3e, the high-pressure pump 13 of the control opening and closing of valve control system 14, will be taken with applying power by high-pressure pump 13
Sample gas is sent back in the containment.When the measured value presence of water vapor concentration, density of hydrogen and oxygen concentration can make hydrogen
Burn and fire risk when, by the warning device 15 that is connected with valve control system 14 determine it is risky in the case of carry out
Alarm, in the case where determining devoid of risk without alarm.
Sensitive electromagnetism is provided with the containment outer portion of the connecting pipeline of connection 2 and first air accumulator 5a of sampling probe
Valve 3a and flow control valve 4；Sensitive electromagnetism is provided with connecting pipelines of the first air accumulator 5a with gas condenser system 9 is connected
Valve 3b；Sensitive solenoid valve 3c is provided with connecting pipelines of the second air accumulator 5b with density of hydrogen analyzer 11 is connected；
Sensitive solenoid valve 3d is set in the connecting pipeline of connection 8 and second air accumulator 5b of high pressure inert gas tank.
All connecting pipeline outside diameters are 6-8mm, internal diameter 3-5mm, and lead metal or nano silver material are scribbled in pipe, are made described
Connecting pipeline there is radiation resistance.And arrangement woven wire in whole connecting pipelines, to strengthen the cold of pipeline center gas
But, make whole connecting pipelines that there is high explosion-proof.
Gas concentration monitoring system carries out gas in containment after the reactor disaster of the invention of above-mentioned example
The principle of concentration monitor is as follows.
A large amount of hydrogen can be produced after major accident in containment, by some samplings for being positioned over diverse location in containment
2 pairs of density of hydrogen of probe carry out on-line real time monitoring.Since each road control method of the monitoring system is identical, herein to appointing
Control method illustrates all the way.
The monitoring system to the gas of diverse location in containment sample at the same time after major accident, then surveys respectively
Amount, ensures to monitor while property to diverse location density of hydrogen in containment.Sensitive solenoid valve 3a is opened rapidly after major accident,
The sampling of diverse location gas in containment is completed, sample gas passes through sampling probe 2, enters air accumulator 5a by flow control valve 4.
When system is just run, 4 standard-sized sheet of flow control valve, ensures that sample gas smoothly enters air accumulator 5a, being initially for air accumulator 5a is near true
Dummy status (absolute pressure is not higher than 100Pa), to improve the accuracy of sample gas each component measurement of concetration.Carrying out gas sample
Sensitive solenoid valve 3b, 3c, 3d, 3e, 3f are closed all the time in journey.Gas parameter measuring system 6 is in air accumulator 5a
The parameters such as sample atmospheric pressure, temperature and humidity measure.Sensitive solenoid valve 3a is closed rapidly after sampling some seconds, stops gas
Sampling.Wherein, the sample air humidity degree that gas parameter measuring system 6 measures in air accumulator 5a is water vapour content.Gas parameter measures
The parameter signals such as the sample atmospheric pressure in air accumulator 5a, temperature and humidity are passed to high pressure inert gas tank control system 7 by system 6,
Gas parameter measuring system 6 is then contained vapor by the relevant equation calculation water vapour content of real gas in thermodynamics
Quantitative change passes to high pressure inert gas tank control system 7 for signal.Subsequent sensitive solenoid valve 3d is opened rapidly, high pressure inert gas tank 8
Nitrogen or inert gas are compensated to the second air accumulator 5b, subsequent sensitive solenoid valve 3d is closed rapidly, and compensation process terminates.
After compensation process, sensitive solenoid valve 3b is opened rapidly, and the sample gas in the first air accumulator 5a is condensed by gas
System 9, into the second air accumulator 5b, was closed rapidly by some seconds sensitive solenoid valve 3b.The gas condenser system 9 is mainly adopted
With activated carbon and anhydrous CuSO4The decompression of dry or pressure reducing valve or the mode of cold water casing cooling, are all controllable with upper type.Storage
There is the big piston of machinery in gas tank 5a, gas can all be extruded, the valve piston on big piston can be by residual gas pressure in pipe
Enter the second air accumulator 5b.Sensitive solenoid valve 3f is closed all the time during this.After gas fully enters the second air accumulator 5b, sensitive electricity
Magnet valve 3f is opened rapidly.Wherein, the pipeline between 9 and second air accumulator 5b of gas condenser system is divided into descending branch and ascent stage,
Pipeline descending branch is more advantageous to condensed water and flows into condensed water collecting box 10, avoids condensed water from being remained in pipeline.Condensation water collection
Condensed water in case 10 needs to be handled and recycled in time.
A sensitive solenoid valve 3c is then opened rapidly, and the hydrogen in the second air accumulator 5b and oxygen concentration are surveyed
Amount, closes sensitive solenoid valve 3c, then opens another sensitive solenoid valve 3c rapidly after being measured, realize to same in containment
The hydrogen of one moment diverse location and the on-line real time monitoring of oxygen concentration.Sample gas in second air accumulator 5b enters density of hydrogen
Analyzer 11, density of hydrogen is measured using the method for inhaling hydrogen infiltration type.Mainly have inside density of hydrogen analyzer 11
The metal rotary disk of constant temperature, turntable are divided into some, and every is placed with hydrogen-absorbing material.According to hydrogen-absorbing material inhale hydrogen after circuit electricity
Changing value is hindered, metal rotary disk is rotated by control system, replaces hydrogen-absorbing material automatically；Pass through the increased resistance value of hydrogen-absorbing material
It can draw density of hydrogen.Sample gas in density of hydrogen analyzer 11 enters back into measured oxygen concentration analyzer 12, oxygen
Measurement of concetration analyzer 12 had the characteristics that according to oxygen it is paramagnetic, using magnetic pressure type method measure oxygen concentration.System root
The risk that can make combustion of hydrogen and fire is determined whether there is according to the vapor in sample gas, hydrogen and measured oxygen concentration value, is believed
Number warning device 15 can be passed to, warning device 15 is risky to work rapidly, and devoid of risk does not work then.Alarm after some seconds,
Sensitive solenoid valve 3e is opened rapidly, and sample gas returns containment by high-pressure pump 13 and completes circulation.The hydrogen that warning device 15 works
Gas concentration monitoring point can take corresponding safety measure reduce after major accident localized hydrogen gas excessive concentration in containment as far as possible and
Produce burning and the risk fired.The measuring signal of vapor, hydrogen and oxygen concentration transmits cable transmission to control by signal
Room processed, signal transmit cable surface and are coated with magnesia as insulating materials, and mgo surface is cased with film and avoids magnesia from absorbing
Vapor in air causes insulation to be lost.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and scope.If in this way, belong to the model of the claims in the present invention and its equivalent technology to these modifications and changes of the present invention
Within enclosing, then the present invention is also intended to comprising including these modification and variations.The above embodiment is illustrating to the present invention
Bright, the present invention can also be implemented with other ad hoc fashions or other particular forms, without departing from idea of the invention or originally
Matter feature.Therefore, it is regarded as from the point of view of the embodiment of description is in terms of any illustrative and non-limiting.The model of the present invention
Enclosing should be illustrated by appended claims, and any change equivalent with the intention of claim and scope should also be included in the present invention
In the range of.
Claims (10)
1. gas concentration monitoring system in containment after reactor disaster, it is characterised in that：The monitoring system includes
The sampling probe being placed in containment, the sensitive solenoid valve being placed in outside containment, the first air accumulator, the second air accumulator, gas are joined
Number measuring systems, high pressure inert gas tank control system, high pressure inert gas tank, gas condenser system, density of hydrogen analyzer,
Measured oxygen concentration analyzer, and each connecting pipeline：
Gas sampled of the sampling probe in containment enters first air accumulator by connecting pipeline；
Gas sampled in first air accumulator can successively enter the gas condenser system, second by connecting pipeline
Air accumulator；
First gas storage that the high pressure inert gas tank control system is measured according to the gas parameter measuring system
The water vapour content of gas sampled in tank, control the high pressure inert gas tank to described second air accumulator compensation nitrogen or
Inert gas；
Gas sampled in second air accumulator can successively be entered the density of hydrogen by connecting pipeline and measure analysis
Instrument, measured oxygen concentration analyzer, to carry out the measurement of density of hydrogen and oxygen concentration analysis respectively；
On containment outer portion of the connection sampling probe with the connecting pipeline of first air accumulator, and even
Connect first air accumulator with the connecting pipeline of the gas condenser system, be connected described in the second air accumulator with it is described
Density of hydrogen analyzer connecting pipeline on, the company of the connection high pressure inert gas tank and second air accumulator
The sensitive solenoid valve is both provided with adapter line.
2. monitoring system according to claim 1, it is characterised in that：The monitoring system further include be arranged on it is described
In containment, the filtration apparatus outside the sampling probe, for being filtered to gas sampled.
3. monitoring system according to claim 1, it is characterised in that：The sampling probe is multiple, is distributed in described
Containment in diverse location.
4. monitoring system according to claim 1, it is characterised in that：The monitoring system, which further includes, is arranged on connection institute
The sampling probe stated and the flow control valve on the containment outer portion of the connecting pipeline of first air accumulator.
5. monitoring system according to claim 1, it is characterised in that：The monitoring system further includes condensation water collection
Case, it is by the another way connecting pipeline connection gas condenser system, for collecting the gas condenser system condensation
The condensed water produced afterwards.
6. monitoring system according to claim 5, it is characterised in that：The monitoring system, which further includes, is arranged on connection institute
The gas condenser system stated and the sensitive solenoid valve in the connecting pipeline of the condensed water collecting box.
7. monitoring system according to claim 1, it is characterised in that：The monitoring system further includes Valve controlling system
System, warning device, high-pressure pump,
The gas sampled that water vapor concentration, density of hydrogen and oxygen concentration have been analyzed in measurement is successively passed through by institute by connecting pipeline
The sensitive solenoid valve, the high-pressure pump for the valve control system control opening and closing stated, it is dynamic to be applied by the high-pressure pump
Power sends gas sampled back in the containment；
When the measured value presence of water vapor concentration, density of hydrogen and oxygen concentration can make combustion of hydrogen and the risk fired, by
The warning device determine it is risky in the case of alarm, determine devoid of risk in the case of without alarm.
8. gas in containment after the monitoring system progress reactor disaster according to any one in claim 1-7
The monitoring method of concentration, it is characterised in that the monitoring method includes the following steps：
(1) after reactor disaster, open in the connecting pipeline for connecting the sampling probe and first air accumulator
Several seconds of sensitive solenoid valve so that the gas sampled of the sampling probe enters first air accumulator, after sampling
Close the connection sampling probe and the sensitive solenoid valve in the connecting pipeline of first air accumulator；
(2) gas sampled that the high pressure inert gas tank control system described in is transmitted according to the gas parameter measuring system measurement
Pressure, temperature, humidity information, calculate water vapour content information, be converted into water vapor concentration, it is lazy to pass to the high pressure
Property gas tank control system, then open the connection high pressure inert gas tank with the connecting pipeline of second air accumulator
Several seconds of sensitive solenoid valve, is compensated nitrogen or inert gas to second air accumulator by the high pressure inert gas tank；
(3) open connection first air accumulator and the sensitive solenoid valve in the connecting pipeline of the gas condenser system is several
Second, gas sampled is entered second air accumulator by first air accumulator；
(4) connection second air accumulator and the sensitive electricity in the connecting pipeline of the density of hydrogen analyzer are opened
Magnet valve, makes gas sampled successively enter the density of hydrogen analyzer, measured oxygen concentration analyzer, carries out hydrogen respectively
The measurement analysis of gas concentration and oxygen concentration.
9. monitoring method according to claim 8, it is characterised in that：The gas condenser system uses activated carbon and nothing
Water CuSO4The mode of dry, pressure reducing valve decompression and/or the cooling of cold water casing carries out gas condensation.
10. monitoring method according to claim 8, it is characterised in that：The density of hydrogen analyzer is using suction
The method measurement density of hydrogen of hydrogen infiltration type, the measured oxygen concentration analyzer are dense using the method measurement oxygen of magnetic pressure type
Degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711023725.2A CN107967952B (en) | 2017-10-27 | 2017-10-27 | System and method for monitoring gas concentration in containment after serious accident of reactor |
Applications Claiming Priority (1)
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| CN112525623A (en) * | 2020-11-24 | 2021-03-19 | 合肥海川石化设备有限公司 | Sampling device for gas concentration measurement |
| CN113539531A (en) * | 2021-06-01 | 2021-10-22 | 中国核电工程有限公司 | System and method for measuring and analyzing gas concentration in containment after serious accident |
| CN114689793A (en) * | 2022-02-10 | 2022-07-01 | 中国核电工程有限公司 | System and method for monitoring concentration of gas in containment vessel |
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