CN107993731B - System for monitoring combustibility of gas in containment after serious accident of reactor - Google Patents
System for monitoring combustibility of gas in containment after serious accident of reactor Download PDFInfo
- Publication number
- CN107993731B CN107993731B CN201711077267.0A CN201711077267A CN107993731B CN 107993731 B CN107993731 B CN 107993731B CN 201711077267 A CN201711077267 A CN 201711077267A CN 107993731 B CN107993731 B CN 107993731B
- Authority
- CN
- China
- Prior art keywords
- gas
- containment
- sampling
- module
- sample
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- 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 belongs to the technical field of nuclear safety control, and relates to a monitoring system for gas flammability in a containment vessel after a serious accident of a reactor. The monitoring system include sampling module, appearance gas processing module, measuring module, standard module to and alternate in each module above inside and each connecting line between each module, sampling module including the sampling subassembly of arranging in the containment, appearance gas processing module including arranging appearance gas tank, the recoil pump outside the containment in, measuring module including arranging in the outer multithread way sample injector, gas analysis device, the standard gas discharge valve of containment, standard module including arranging in outer standard gas steel bottle, the standard gas control valve of containment. The monitoring system for the gas flammability in the containment vessel after the severe accident of the reactor can reliably operate and accurately monitor the gas flammability in the containment vessel, and a monitoring object is not limited to combustible gas represented by hydrogen, and also comprises combustion-supporting gas represented by oxygen and water vapor.
Description
Technical Field
The invention belongs to the technical field of nuclear safety control, and relates to a monitoring system for gas flammability in a containment vessel after a serious accident of a reactor.
Background
After a severe accident of a reactor of a nuclear power station, combustible gas can be generated in the containment vessel through two ways: one way is to generate a large amount of hydrogen by the reaction of zirconium water in the reactor core, and the other way is to generate gases such as hydrogen, carbon monoxide and the like by the interaction of the molten reactor core and concrete. After a serious accident, the internal temperature and pressure of the containment vessel are high, and the risk of combustion and explosion of combustible gas represented by hydrogen exists, so that the integrity of the containment vessel is greatly threatened.
After the nuclear accident of fukushima, the nuclear safety agency issues general technical requirements for improvement of nuclear power plant after the fukushima nuclear accident (hereinafter referred to as "requirements"), which are clearly specified: in severe accidents, the hydrogen concentration in the containment vessel can be monitored in the whole process and corresponding alarm is set, so that the state of the nuclear power plant can be determined and practical information can be provided for decision making during accident management. It is desirable to avoid the integrity of the containment vessel from being compromised by combustion or explosion that may occur after hydrogen accumulation in local areas. Hydrogen concentration monitoring and control measures should be incorporated into the critical accident management guidelines or related regulations ".
In a serious accident, the combustibility of the gas in the containment vessel mainly depends on the content ratio of combustible gas, combustion-supporting gas and water vapor, wherein the combustible gas mainly comprises hydrogen, carbon monoxide and the like, the combustion-supporting gas mainly comes from oxygen contained in the air in the containment vessel, and the water vapor mainly comes from a containment vessel spraying system and a primary loop. Therefore, the determination of the flammability of a gas entails first monitoring the hydrogen, carbon monoxide, oxygen and water vapor content.
The content and distribution of combustible gas, combustion-supporting gas and steam are specific under each accident condition, and information such as the generation rate of the combustible gas, the area of releasing the combustible gas into the containment, the content proportion of the three gases, the threat of combustion load to the containment and the like is necessary for serious accident management.
At present, for monitoring the gas in the containment after a serious accident, domestic and foreign research focuses on designing a reference accident or a hydrogen concentration monitoring scheme after the serious accident, and the combustible gas in the containment is not judged based on the content of combustible gas, combustion-supporting gas and steam.
The hydrogen concentration monitoring has two main technical schemes, namely direct measurement in the shell and sampling measurement outside the shell. For the direct measurement mode in the shell, a hydrogen measurement sensor needs to be installed in the containment vessel, and original signals are transmitted to a signal processing module outside the containment vessel through a cable to analyze and calculate the hydrogen concentration; for the out-of-shell sampling measurement mode, the hydrogen measurement sensor is installed outside the containment vessel, a small amount of high-temperature, high-pressure and high-radioactivity gas in the shell is sampled outside the containment vessel, and is subjected to pretreatment such as filtration, cooling, depressurization, dehumidification and the like, and then is sent to an analysis instrument for concentration measurement. The direct measurement mode system in the shell is simple in structure and short in measurement response time, but the sensor needs to endure severe accident environmental conditions such as high temperature, high pressure and high radioactivity, so that the requirement on the measurement stability and reliability of the sensor is extremely high, the severe accident environmental condition identification needs to be carried out on the sensor and a cable, and the sensor cannot be calibrated and maintained during the normal operation of a unit. The sampling measurement mode system outside the shell is complex in structure and relatively lags in measurement, but the sensor is installed outside the containment, does not need to withstand serious accident environmental conditions, and is simple in design and manufacture, high in measurement accuracy and easy to calibrate and maintain.
In view of the foregoing, it would be highly desirable to provide an in-containment gas flammability monitoring system that is capable of reliable operation in the event of a serious accident.
Disclosure of Invention
The invention aims to provide a containment gas flammability monitoring system after a reactor serious accident, which can reliably operate and accurately monitor the gas flammability in a containment, and a monitoring object is not limited to combustible gas represented by hydrogen, and also comprises combustion-supporting gas represented by oxygen and water vapor.
To achieve the object, in a basic embodiment, the present invention provides a monitoring system for flammability of gas in a containment vessel after a severe accident in a reactor, the monitoring system comprising a sampling module, a sample gas processing module, a measuring module, a standard module, and connecting lines inserted into and between the above modules,
the sampling module comprises a sampling assembly arranged in the containment, and the sample gas treatment module comprises a sample gas tank and a back-flushing pump which are arranged outside the containment; the sampling assembly samples gas in the containment vessel by the power provided by the backwash pump, and the sampled gas enters the sample gas tank through a connecting pipeline; the sampling gas in the sample gas tank can be conveyed back to the containment vessel from the sample gas tank through the power provided by the backwash pump arranged on one connecting pipeline connected with the sample gas tank,
the measurement module comprises a multi-flow-path sample injector, a gas analysis device and a standard gas discharge valve which are arranged outside the containment; the sampling gas in the sample gas tank enters the gas analysis device through the multi-channel sample injector through the other connecting pipeline connected with the sample gas tank (the sampling gas at different positions in the containment can sequentially enter the gas analysis device through the multi-channel sample injector) to carry out concentration analysis on combustible gas (hydrogen and carbon monoxide), combustion-supporting gas (oxygen) and water vapor; the standard gas discharge valve is arranged on a connecting pipeline connected with the outlet of the gas analysis device and used for controlling and discharging standard gas calibrated to the gas analysis device,
the standard module comprises a standard gas steel cylinder and a standard gas control valve which are arranged outside the containment; the standard gas stored in the standard gas cylinder enters the gas analysis device through a connecting pipeline and is used for calibrating the gas analysis device (including zero point and measuring range point calibration); the standard gas control valve is arranged on a connecting pipeline between the standard gas steel cylinder and the gas analysis device.
In a preferred embodiment, the present invention provides a containment gas flammability monitoring system after a reactor severe accident, wherein the sampling assemblies are distributed in multiple groups, respectively, in the containment dome and other equipment compartments.
In a preferred embodiment, the invention provides a containment gas flammability monitoring system after a reactor severe accident, wherein the sampling assembly consists of a spray prevention cover, a venturi tube and a metal fiber filter, wherein the spray prevention cover is used for preventing aerosol and spray water in the containment from entering a connecting pipeline; the Venturi tube is used for reducing the pressure of the sampled gas, so that the sampled gas is in an overheated state, and the sampled gas is prevented from being condensed; the metal fiber filter is used for filtering particulate matters in sampling gas.
In a preferred embodiment, the invention provides a monitoring system for the gas flammability in a containment vessel after a severe accident of a reactor, wherein the sampling module further comprises an in-shell temperature measuring element, the monitoring system further comprises an out-shell connecting pipeline heat tracing device and a sample gas processing module heat tracing device,
the temperature measuring element in the shell is arranged on the part, located in the containment, of a connecting pipeline connecting the sampling assembly and the sample gas tank, and the measured sampling gas temperature value is fed back to the heat tracing device of the connecting pipeline outside the shell and the heat tracing device of the sample gas processing module and is used as a set value for heating and controlling the temperature of the sample gas;
the shell external connecting pipeline heat tracing device and the sample gas processing module heat tracing device are used for heating the sampled gas to the temperature consistent with the temperature value measured by the temperature measuring element in the shell, so that the sampled gas is prevented from being condensed to influence the gas concentration measurement result.
In a preferred embodiment, the present invention provides a containment gas flammability monitoring system after a reactor severe accident, wherein the sampling module further comprises a containment penetration piece disposed on the containment vessel, and the connecting line penetrates through the containment vessel through the containment penetration piece.
In a preferred embodiment, the present invention provides an in-containment gas flammability monitoring system after a reactor severe accident, wherein the sampling module further comprises a containment isolation valve disposed on a portion of the connection line connecting the sampling assembly and the sample gas tank outside the containment and in close proximity to the containment.
In a preferred embodiment, the invention provides a containment gas flammability monitoring system after a reactor severe accident, wherein the sample gas processing module further comprises an outer shell temperature measuring element and an outer shell pressure measuring element, which are arranged on the part of a connecting pipeline connecting the sampling assembly and the sample gas tank outside the containment, and are used for measuring and judging whether the sampled gas is in an overheated state and an oversaturated state respectively.
In a preferred embodiment, the present invention provides a system for monitoring flammability of gas in a containment vessel after a severe accident in a reactor, wherein the sample gas processing module further comprises a sample valve disposed on a connection line connecting the sample gas tank and the multi-channel sample injector (the sample valve is opened and closed simultaneously, and the measurement module is used to sequentially analyze the sampled gas in the sample gas tank).
In a preferred embodiment, the invention provides a containment gas flammability monitoring system after a reactor severe accident, wherein the sample gas processing module further comprises a discharge valve and a containment isolation valve (the discharge valve is opened and closed simultaneously, so as to purge the sample gas tank and discharge a small amount of condensed liquid in the sample gas tank) which are arranged on a connecting pipeline where the back flushing pump is located.
In a preferred embodiment, the present invention provides an in-containment gas flammability monitoring system following a severe reactor accident, where all or part of the connecting lines (including the in-containment connecting line and the out-of-containment connecting line near the containment) are capillary lines to minimize the risk of radioactive material being released into the surrounding environment.
In a preferred embodiment, the invention provides a monitoring system for the flammability of gas in a containment vessel after a severe accident in a reactor, wherein the monitoring system further comprises a power supply module and a signal processing and control module,
the power supply module provides power supply for all components needing power supply including all valves in the monitoring system;
the signal processing and control module realizes the control of all valves in a hard-wired mode; the communication with the measuring module is realized through communication modes such as OPC, Modbus, Profibus DP or industrial Ethernet; communication with a remote DCS system is achieved through an industrial ethernet or hard-wired.
In a more preferred embodiment, the invention provides a monitoring system for the flammability of gas in a containment vessel after a serious accident of a reactor, wherein the signal processing and control module consists of a PLC control unit, a data processing unit and a display unit,
the PLC control unit is used for realizing equipment control so as to finish sampling and gas component analysis according to a set flow;
the data processing unit is used for realizing data calculation functions such as judgment of combustion states (inertia, slow combustion and fast combustion) and the like and realizing a communication function with a remote DCS (distributed control system);
the display unit is used for displaying calculation results of all levels and setting parameters.
The monitoring system for the gas flammability in the containment after the severe accident of the reactor can reliably operate and accurately monitor the gas flammability in the containment, and a monitored object is not limited to combustible gas represented by hydrogen, and also comprises combustion-supporting gas represented by oxygen and water vapor.
The monitoring system for the combustibility of the gas in the containment vessel after the serious accident of the reactor can realize the continuous monitoring of the combustible gas, the combustion-supporting gas and the steam in the containment vessel after the serious accident, and judge the combustion state (inert combustion, slow combustion and fast combustion) of the gas components in the containment vessel, thereby providing information for the accident management decision.
Drawings
FIG. 1 is a block diagram of an exemplary in-containment gas flammability monitoring system following a severe reactor accident in accordance with the present invention.
Fig. 2 is a partially enlarged view of the sampling module 1 in fig. 1.
Fig. 3 is a partially enlarged view of the sample gas treatment module 2 of fig. 1.
Fig. 4 is a partially enlarged view of the measuring module 3 in fig. 1.
Fig. 5 is a partially enlarged view of the calibration module 4 in fig. 1.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings.
An exemplary in-containment gas concentration monitoring system after a reactor severe accident according to the present invention is shown in fig. 1-5, and includes a sampling module 1, a sample gas processing module 2, a measurement module 3, a standard module 4, a power supply module 5, a signal processing and control module 6, an out-of-shell connection pipeline heat tracing device 106, a sample gas processing module heat tracing device 208, and connection pipelines (including an in-shell sampling pipeline 103 located in a containment vessel, and an out-of-shell sampling pipeline 108 located outside the containment vessel and connecting the sampling module 1 and the sample gas processing module 2) inserted into and between the above modules.
The sampling module 1 comprises a sampling assembly 101 arranged in a containment, an in-shell temperature measuring element 102, a containment penetration piece 104 and a containment isolation valve 105, and the sample gas treatment module 2 comprises an out-of-shell pressure measuring element 201 arranged outside the containment, an out-of-shell temperature measuring element 202, an inlet valve 203, an inlet valve 204, a sample gas tank 205, a discharge valve 206 and a backwash pump 207.
The sampling assemblies 101 are distributed in multiple groups, respectively, in the dome in the containment and in other equipment compartments. The sampling assembly 101 consists of a spray prevention cover, a Venturi tube and a metal fiber filter, wherein the spray prevention cover is used for preventing aerosol and spray water in the containment vessel from entering a connecting pipeline; the Venturi tube is used for reducing the pressure of the sampled gas to ensure that the sampled gas is in an overheated state; the metal fiber filter is used for filtering particulate matters such as aerosol in sampling gas and preventing the aerosol from blocking a connecting pipeline or damaging the measuring module 3.
The sampling assembly 101 performs gas sampling in the containment vessel by the power provided by the backwash pump 207, and the sampled gas enters the sample gas tank 205 through the connecting lines (including the in-shell sampling line 103 and the out-shell sampling line 108). The sampled gas in the sample gas tank 205 can be transported from the sample gas tank 205 back into the containment by the power provided by the backwash pump 207 provided on a connecting line connected to the sample gas tank 205.
The in-shell temperature measuring element 102 is arranged on the in-shell sampling pipeline 103 connecting the sampling assembly 101 and the sample gas tank 205, and the measured sampling gas temperature value is fed back to the out-shell connecting pipeline heat tracing device 106 and the sample gas processing module heat tracing device 208 to be used as a set value for heating and controlling the temperature.
The shell external connection pipeline heat tracing device 106 and the sample gas processing module heat tracing device 208 are used for heating the sampled gas to a temperature consistent with the temperature value measured by the temperature measuring element 102 in the shell, so as to ensure that the sampled gas is not condensed and prevent the condensation of the sampled gas from influencing the gas concentration measurement result (the temperature feedback value is derived from the shell external temperature measuring element 202).
The containment penetration 104 is disposed on the containment vessel and the connecting lines pass through the containment penetration 104 and out of the containment vessel.
The containment isolation valve 105 is located on the connection line between the out-of-shell sampling line 108 and the backwash pump 207 and is in close proximity to the containment for isolating the containment under special circumstances. A discharge valve 206 is also provided in the connection line of the backwash pump 207.
The outer-shell temperature measuring element 202 and the outer-shell load cell 201 are both arranged on the part, outside the containment, of a connecting pipeline connecting the sampling assembly 101 and the sample gas tank 205, and are used for measuring and judging whether the sampled gas is in an overheated state or an oversaturated state.
An inlet valve 203 is provided in the connecting line connecting the sampling assembly 101 to the sample gas tank 205, behind the out-of-shell temperature measurement cell 202 and the out-of-shell load cell 201 (the inlet valve 203 opens and closes simultaneously to allow for simultaneous purging of the sample gas tank 205 and sampling of the in-containment gas).
The sample introduction valve 204 is provided on a connection line connecting the sample tank 205 and the multi-channel sample injector 301 of the measurement module 3.
Furthermore, a condensate collection tank 107 is located within the containment vessel for collecting condensate within the containment vessel.
The measurement module 3 comprises a multi-flow path injector 301 placed outside the containment, a gas analysis device 302, a standard gas vent valve 303. The sampling gas in the sample gas tank 205 passes through another connecting line connected to the sample gas tank 205, and enters the gas analysis device 302 through the multi-channel sampler 301 (the sampling gas at different positions in the containment vessel can enter the gas analysis device 302 through the multi-channel sampler 301 in sequence for analysis under the conditions that the sampling valve 204 is opened, and the inlet valve 203 and the discharge valve 206 are closed), so that the concentration analysis of combustible gas (hydrogen and carbon monoxide), combustion-supporting gas (oxygen) and water vapor is performed. A standard gas discharge valve 303 is provided on a connection line connected to an outlet of the gas analysis device 302, for controlling discharge of the standard gas calibrated for the gas analysis device 302 to the ambient atmosphere.
The standard module 4 includes a standard gas cylinder 401 placed outside the containment, a standard gas control valve 402. The standard gas stored in the standard gas cylinder 401 is fed into the gas analysis apparatus 302 through a connecting line for calibration (including zero point and span point calibration) of the gas analysis apparatus 302. A standard gas control valve 402 is provided in a connection line between the standard gas cylinder 401 and the gas analyzer 302.
The power module 5 receives an external 220V ac power supply, and supplies power to the containment isolation valve 105, all pilot-operated pneumatic valves (including the inlet valve 203, the injection valve 204, the exhaust valve 206, and the standard gas exhaust valve 303, which cannot operate in a high-temperature environment, and therefore the pilot-operated pneumatic valves are selected, and the solenoid valves placed in a normal-temperature environment control the pneumatic valves by controlling the pilot gas, the recoil pump 207, the multi-flow path sample injector 301, the gas analysis device 302, the standard gas control valve 402, the signal processing and control module 6, the case external connection pipeline heat tracing device 106, and the sample gas processing module heat tracing device 208.
The signal processing and control module 6 realizes the control of all valves in a hard-wired mode; the communication with the measuring module 3 is realized through communication modes such as OPC, Modbus, Profibus DP or industrial Ethernet; communication with the remote DCS system 7 is achieved by industrial ethernet or hard-wired.
The signal processing and control module 6 is composed of a PLC control unit, a data processing unit and a display unit. The PLC control unit is used for realizing equipment control so as to finish sampling and gas component analysis according to a set flow; the data processing unit is used for realizing data calculation functions such as judgment of combustion states (inertia, slow combustion and fast combustion) and the like and realizing a communication function with the remote DCS (distributed control system) 7; the display unit is used for displaying calculation results of all levels and setting parameters.
All or part of the connecting lines (including the in-shell sampling line 103 and the out-shell sampling line 108) are capillary lines to minimize the risk of radioactive material being released into the surrounding environment.
The sampling operation and the gas concentration analysis operation of the containment gas flammability monitoring system after a severe reactor accident according to the exemplary embodiment of the present invention are as follows.
During sampling, the signal processing and control module 6 controls the opening of the inlet valve 203 and the discharge valve 206, the closing of the sample valve 204, the starting of the backwash pump 207, the purging of the in-shell sampling pipeline 103, the out-shell sampling pipeline 108 and the sample gas tank 205 by the sampling gas, the closing of the discharge valve 206 after a certain time, the closing of the inlet valve 203, and the completion of the sampling. Therefore, the condensed gas in the sample gas tank 205 or the sampled gas measured at the previous time and the excess sampled gas in the measurement module 3 can be flushed back into the containment by the back-flushing pump 207.
When the gas component concentration is analyzed, the sample valve 204 and the multi-flow-path sample injector 301 are opened simultaneously to control each path of sampling gas to sequentially enter the gas analysis device 302 for analysis according to the time sequence, and the volume concentrations of combustible gas, combustion-supporting gas and steam are obtained. Excess sample gas is flushed back into the containment vessel by the backwash pump 207.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations. The above-described embodiments are merely illustrative of the present invention, and the present invention may be embodied in other specific forms or other specific forms without departing from the spirit or essential characteristics thereof. The described embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the invention should be indicated by the appended claims, and any changes that are equivalent to the intent and scope of the claims should be construed to be included therein.
Claims (6)
1. The utility model provides a gaseous flammability monitoring system in containment behind reactor serious accident which characterized in that: the monitoring system comprises a sampling module, a sample gas processing module, a measuring module, a standard module and connecting pipelines which are inserted in the modules and among the modules,
the sampling module comprises a sampling assembly arranged in the containment, and the sample gas treatment module comprises a sample gas tank and a back-flushing pump which are arranged outside the containment; the sampling assembly samples gas in the containment vessel by the power provided by the backwash pump, and the sampled gas enters the sample gas tank through a connecting pipeline; the sampling gas in the sample gas tank can be conveyed back to the containment vessel from the sample gas tank through the power provided by the backwash pump arranged on one connecting pipeline connected with the sample gas tank,
the measurement module comprises a multi-flow-path sample injector, a gas analysis device and a standard gas discharge valve which are arranged outside the containment; the sampling gas in the sample gas tank enters the gas analysis device through the multi-channel sample injector through the other connecting pipeline connected with the sample gas tank to carry out concentration analysis on combustible gas, combustion-supporting gas and water vapor; the standard gas discharge valve is arranged on a connecting pipeline connected with the outlet of the gas analysis device and used for controlling and discharging standard gas calibrated to the gas analysis device,
the standard module comprises a standard gas steel cylinder and a standard gas control valve which are arranged outside the containment; the standard gas stored in the standard gas cylinder enters the gas analysis device through a connecting pipeline and is used for calibrating the gas analysis device; the standard gas control valve is arranged on a connecting pipeline between the standard gas steel cylinder and the gas analysis device,
the sampling assembly consists of a spray prevention cover, a Venturi tube and a metal fiber filter, wherein the spray prevention cover is used for preventing aerosol and spray water in the containment vessel from entering a connecting pipeline; the Venturi tube is used for reducing the pressure of the sampling gas and enabling the sampling gas to be in an overheated state; the metal fiber filter is used for filtering granular substances in sampling gas,
the sampling module also comprises an in-shell temperature measuring element, the monitoring system also comprises an out-shell connecting pipeline heat tracing device and a sample gas processing module heat tracing device,
the temperature measuring element in the shell is arranged on the part, located in the containment, of a connecting pipeline connecting the sampling assembly and the sample gas tank, and the measured sampling gas temperature value is fed back to the heat tracing device of the connecting pipeline outside the shell and the heat tracing device of the sample gas processing module and is used as a set value for heating and controlling the temperature of the sample gas;
the shell external connecting pipeline heat tracing device and the sample gas processing module heat tracing device are used for heating the sampled gas to the temperature consistent with the temperature value measured by the temperature measuring element in the shell, preventing the sampled gas from condensing to influence the gas concentration measurement result,
the sample gas processing module also comprises a sample injection valve which is arranged on a connecting pipeline connecting the sample gas tank and the multi-channel sample injector,
the sample gas treatment module further comprises a discharge valve and a containment isolation valve which are arranged on the connecting pipeline where the backwash pump is located.
2. The monitoring system of claim 1, wherein: the sampling assemblies are in a plurality of groups and are respectively distributed in the dome in the containment vessel and other equipment compartments.
3. The monitoring system of claim 1, wherein: the sampling module further comprises a containment vessel penetrating piece arranged on the containment vessel, and the connecting pipeline penetrates through the containment vessel penetrating piece and penetrates out of the containment vessel.
4. The monitoring system of claim 1, wherein: the sampling module further comprises a containment isolation valve which is arranged on the part, outside the containment, of a connecting pipeline connecting the sampling assembly and the sample gas tank and is close to the containment.
5. The monitoring system of claim 1, wherein: the sample gas processing module further comprises an outer-shell temperature measuring element and an outer-shell pressure measuring element which are arranged on a part of a connecting pipeline connecting the sampling assembly and the sample gas tank and located outside the containment, and the outer-shell temperature measuring element and the outer-shell pressure measuring element are respectively used for measuring and judging whether the sampling gas is in an overheated state or a supersaturated state.
6. The monitoring system of claim 1, wherein: the monitoring system also comprises a power module and a signal processing and control module,
the power supply module provides power supply for all components needing power supply including all valves in the monitoring system;
the signal processing and control module realizes the control of all valves in a hard-wired mode; the communication with the measuring module is realized through an OPC (optical proximity correction), Modbus, Profibus DP or industrial Ethernet communication mode; communication with a remote DCS system is achieved through an industrial ethernet or hard-wired.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711077267.0A CN107993731B (en) | 2017-11-06 | 2017-11-06 | System for monitoring combustibility of gas in containment after serious accident of reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711077267.0A CN107993731B (en) | 2017-11-06 | 2017-11-06 | System for monitoring combustibility of gas in containment after serious accident of reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107993731A CN107993731A (en) | 2018-05-04 |
| CN107993731B true CN107993731B (en) | 2021-08-17 |
Family
ID=62031272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711077267.0A Active CN107993731B (en) | 2017-11-06 | 2017-11-06 | System for monitoring combustibility of gas in containment after serious accident of reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107993731B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112102971B (en) * | 2020-09-23 | 2022-08-05 | 中国核动力研究设计院 | Capillary penetration piece of nuclear power device and installation method |
| 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 |
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323295A (en) * | 2011-09-30 | 2012-01-18 | 中广核工程有限公司 | System for monitoring concentration of hydrogen in containment vessel |
| CN106342210B (en) * | 2009-12-31 | 2013-08-28 | 中国船舶重工集团公司第七一八研究所 | A kind of for measuring the sampling analytical system of concentration of hydrogen in containment vessel |
| CN106342217B (en) * | 2009-12-31 | 2014-01-22 | 中国船舶重工集团公司第七一八研究所 | A kind of for measuring the method for density of hydrogen in npp safety shell |
| CN104951648A (en) * | 2015-05-25 | 2015-09-30 | 中国核电工程有限公司 | Method used for estimating oxygen concentration generated after serious accident of nuclear power plant |
| CN105513654A (en) * | 2016-01-18 | 2016-04-20 | 中国工程物理研究院材料研究所 | Device for rapidly measuring hydrogen at plurality of points after containment accident of nuclear power plant and realization method of device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004050308A1 (en) * | 2004-10-14 | 2006-06-14 | Framatome Anp Gmbh | Method and sampling system for recovering a sample from the atmosphere in a reactor containment of a nuclear facility |
-
2017
- 2017-11-06 CN CN201711077267.0A patent/CN107993731B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106342210B (en) * | 2009-12-31 | 2013-08-28 | 中国船舶重工集团公司第七一八研究所 | A kind of for measuring the sampling analytical system of concentration of hydrogen in containment vessel |
| CN106342217B (en) * | 2009-12-31 | 2014-01-22 | 中国船舶重工集团公司第七一八研究所 | A kind of for measuring the method for density of hydrogen in npp safety shell |
| CN102323295A (en) * | 2011-09-30 | 2012-01-18 | 中广核工程有限公司 | System for monitoring concentration of hydrogen in containment vessel |
| CN104951648A (en) * | 2015-05-25 | 2015-09-30 | 中国核电工程有限公司 | Method used for estimating oxygen concentration generated after serious accident of nuclear power plant |
| CN105513654A (en) * | 2016-01-18 | 2016-04-20 | 中国工程物理研究院材料研究所 | Device for rapidly measuring hydrogen at plurality of points after containment accident of nuclear power plant and realization method of device |
Non-Patent Citations (1)
| Title |
|---|
| 严重事故后安全壳内氢气浓度测量方式对比分析;冯雨 等;《核工程研究与设计 》;20170630(第111期);53-60 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107993731A (en) | 2018-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2358255C2 (en) | Method and system of taking samples from atmosphere of reactor containment of nuclear process installation | |
| CN107993731B (en) | System for monitoring combustibility of gas in containment after serious accident of reactor | |
| CN201811870U (en) | Self-starting type sampling and analyzing device for measuring concentration of hydrogen in containment | |
| KR102225810B1 (en) | Emission monitoring system for a venting system of a nuclear power plant | |
| US6900439B2 (en) | Gas leakage detection system, gas leakage detection method and semiconductor manufacturing apparatus | |
| CN102323295A (en) | System for monitoring concentration of hydrogen in containment vessel | |
| CN106342210B (en) | A kind of for measuring the sampling analytical system of concentration of hydrogen in containment vessel | |
| CN108827821B (en) | Device and method for rapidly analyzing hydrogen concentration in nuclear power station containment | |
| CN104200856A (en) | Comprehensive performance testing device for oxyhydrogen composite catalyst and application method thereof | |
| CN105004801A (en) | Loop heat pipe ammonia working medium purity analysis device | |
| CN108801718A (en) | A kind of tail gas on-line monitoring system peculiar to vessel | |
| EA016571B1 (en) | Method for automated fuel leakage detection during reloading of reactor fuel assembly and system therefor | |
| CN209229756U (en) | It is a kind of to detect the safety device for improving heat accumulation type thermal oxidation furnace based on LEL | |
| Jung et al. | Experimental investigation of iodine decontamination performance of a filtered containment venting system in ARIEL facility | |
| CN212083364U (en) | In-situ calibration device for gas concentration detector in closed environment | |
| CN114354162A (en) | System and method for testing hydrogen system sub-component for fuel cell system | |
| CN208187667U (en) | The device of the pressure application leak detection and Data correction of elemental analyser gas piping | |
| KR101657250B1 (en) | Inservice inspection equipment for passive autocatalytic recombiners | |
| RU2542604C1 (en) | Method of testing gas analytical sensors for operation speed with response time of less than 4 seconds | |
| CN201732055U (en) | Multi-component infrared gas analyzing apparatus for coal mine | |
| CZ263092A3 (en) | Apparatus for monitoring atmosphere inside a nuclear plant safety tank | |
| CN220019462U (en) | Oxyhydrogen content sampling and monitoring device in radioactive gas for nuclear power station | |
| CN211741206U (en) | Explosion-proof type hydrogen concentration on-line monitoring device of nuclear power plant hydrogen station | |
| CN218674633U (en) | Experimental device for be used for collecting and analysis waste liquid jar explosion aerosol | |
| CN219574057U (en) | Automatic distribution testing arrangement suitable for CEMS inspection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |