CN102323295A - System for monitoring concentration of hydrogen in containment vessel - Google Patents
System for monitoring concentration of hydrogen in containment vessel Download PDFInfo
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- CN102323295A CN102323295A CN201110293133A CN201110293133A CN102323295A CN 102323295 A CN102323295 A CN 102323295A CN 201110293133 A CN201110293133 A CN 201110293133A CN 201110293133 A CN201110293133 A CN 201110293133A CN 102323295 A CN102323295 A CN 102323295A
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Abstract
The invention discloses a system for monitoring the concentration of hydrogen in a containment vessel. The system comprises a sampling head arranged in the containment vessel, a sampling pipeline connected with the sampling head, and a gas analyzer connected with the sampling pipeline penetrating out of the containment vessel, wherein the sampling pipeline is a capillary stainless steel pipe, and a filter for preventing large-particle aerosol or suspended matters form entering the sampling pipeline is arranged on the sampling head. A containment vessel external-sampling monitoring mode is adopted in the system for monitoring the concentration of the hydrogen in the containment vessel, the problem of isolation of the containment vessel of the traditional sampling and monitoring system under serious accidents is effectively solved by adopting the capillary stainless steel pipe, and the capillary stainless steel pipe is prevented from being blocked through arranging the filter on the sampling head.
Description
Technical field
The present invention relates to the nuclear power security fields, density of hydrogen monitoring system in especially a kind of containment.
Background technology
After the accident; The monitoring of density of hydrogen on-line continuous is one of insoluble common problem of domestic two generation pressurized-water reactor nuclear power plants in the containment; Though requiring of the rule and standard of present various countries is inconsistent, nuclear power developing trend requires to strengthen to containing the monitoring of barrier and nuclear safety function, and State Bureau of Nuclear Safety has also proposed requirement to density of hydrogen continuous monitoring in the containment under the major accident; Particularly after the Fukushima accident, the quick-fried problem of hydrogen receives much concern especially.
At present, mainly containing two kinds of technical schemes for density of hydrogen monitoring in the containment after the accident both at home and abroad, is respectively sensor to be installed in the containment carry out sampling monitoring outward with containment.
Sensor is installed in and just must be able to bears when having an accident in the containment and the environmental baseline in the containment after the accident; Because the hydrogen sensor and the signal-transmitting cable that are arranged at present in the containment basically all are difficult to the evaluation requirement through major accident rugged surroundings (high temperature, high pressure, high radioactivity etc.), so this scheme can only be used for the survey hydrogen under the design basis accident.When France EDF improves at the VD3 of CPY unit, adopted and installed thermopair on the hydrogen recombiner additional, come the concentration of monitoring hydrogen through the temperature rise (Δ T-PAR) of the compound generation of hydrogen.The method adopts technology maturation, thermopair is measured reliably, and hydrogen recombiner also can be identified through the environment of major accident basically.But its measuring accuracy is not high, and the part possibly cause measurement result inaccurate because of the oxygen deficiency, and temperature rise is different with the curve of concentration correspondence under the varying environment condition.In addition, the inefficacy of hydrogen recombiner can cause the common mode failure of hydrogen monitoring function.Therefore, this scheme will realize effective monitoring of density of hydrogen under the major accident, also needs further to improve and optimize.
Sensor is installed in outside the containment, need realize monitoring through sampling system, but existing C PR1000 draws the sampling monitoring density of hydrogen through ETY (containment atmospheric monitoring system) pipeline, can not realize online continuous monitoring.Though prior art is surveyed on the hydrogen basis at original ETY, through drawing arm, sample gas is delivered in the gas analyzer measured, thereby realize the on-line continuous monitoring under the design basis accident from the ETY pipeline; But under the major accident operating mode, because the ETY pipeline is isolated, sampling is compelled to be ended, and monitoring function still can't be realized.
In view of this, necessary provide a kind of still can the containment of reliability service under super design reference accident (DEC) in the density of hydrogen monitoring system.
Summary of the invention
The objective of the invention is to: provide a kind of still can the containment of reliability service under the super design reference accident in the density of hydrogen monitoring system, with the on-line continuous monitoring of density of hydrogen in the containment after the realization accident.
To achieve these goals; The invention provides density of hydrogen monitoring system in a kind of containment; It comprises the sampling head that is arranged in the containment, the sampling line that links to each other with sampling head, the gas analyzer that is connected with the sampling line that passes containment; Sampling line is the capillary stainless-steel tube, has on the sampling head to prevent that bulky grain gasoloid or suspension from getting into the filtrator of sampling line.
As a kind of improvement of density of hydrogen monitoring system in the containment of the present invention, the external diameter of said capillary stainless-steel tube is 4 ~ 6mm, and internal diameter is minimal to 0.5mm.
As a kind of improvement of density of hydrogen monitoring system in the containment of the present invention, said sampling head is a plurality of, is arranged at the diverse location in the containment respectively, every with sampling line that sampling head is connected on all be provided with the solenoid valve of controlling the pipeline break-make.
As a kind of improvement of density of hydrogen monitoring system in the containment of the present invention, also comprise with gas analyzer being connected in gas analyzer, to form the vacuum pump of negative pressure.
As a kind of improvement of density of hydrogen monitoring system in the containment of the present invention, said vacuum pump is connected with gas analyzer through surge tank.
As a kind of improvement of density of hydrogen monitoring system in the containment of the present invention, said vacuum pump also is connected with the gas return line that stainless steel capillary is processed, and after the gas return line penetrates containment, directly is communicated with the interior gas of containment.
As a kind of improvement of density of hydrogen monitoring system in the containment of the present invention, said gas analyzer is connected with RAZ through pipeline, and on associated line, is provided with the solenoid valve of control pipeline break-make.
As a kind of improvement of density of hydrogen monitoring system in the containment of the present invention, said gas analyzer also is connected with nitrogen cylinder through the pipeline that is provided with solenoid valve.
As a kind of improvement of density of hydrogen monitoring system in the containment of the present invention, said gas analyzer is a thermal-conductivity type gas analyser, takes insulation companion heat on the outer sampling line of containment, remains superheat state to guarantee sample gas.
As a kind of improvement of density of hydrogen monitoring system in the containment of the present invention, the operation of total system is by the outer I&C module controls of barrier shield, and the measuring-signal of gas analyzer shows to master control DCS through cable transmission.
The density of hydrogen monitoring system adopts the outer sampling monitoring mode of containment in the containment of the present invention; Effectively solved the containment isolating problem of existing sampling monitoring system under major accident through the employing stainless steel capillary, and prevented that through the filtrator that is arranged at sampling head stainless steel capillary from stopping up.
Description of drawings
Below in conjunction with accompanying drawing and embodiment, density of hydrogen monitoring system in the containment of the present invention and useful technique effect thereof are elaborated.
Fig. 1 is the structural representation of density of hydrogen monitoring system in the containment of the present invention.
Embodiment
See also Fig. 1; The density of hydrogen monitoring system comprises sampling head 10, sampling line 12, vacuum pump 14, gas analyzer 16, RAZ (the nitrogen distribution system provides nitrogen purging), nitrogen cylinder 18, surge tank 20 and gas return line 22 in the containment of the present invention.
During use; Close the solenoid valve 120 of the sampling line 12 that wouldn't take a sample, the solenoid valve 180 of nitrogen cylinder 18 and the solenoid valve on the RAZ pipeline; Vacuum pump 14 is promptly at gas analyzer 16 with do not cut out and form negative pressure in the sampling line 12 of solenoid valve 120, and the gas of corresponding point gets into gas analyzers 16 through sampling line 12 and accomplishes gas sample in the containment 30.16 pairs of gaseous samples of getting of gas analyzer carry out the density of hydrogen analysis.Afterwards; Close the solenoid valve 120 of all sampling lines 12; And open solenoid valve and the solenoid valve 180 on the RAZ pipeline; Vacuum pump 14 promptly forms negative pressure in gas analyzer 16, and the radioactivity tail gas that measures is sent back in the containment 30 through gas return line 22, thereby prevents that effectively radgas from leaking in the ambient atmosphere.In this process, the nitrogen in the nitrogen distribution system gets into gas analyzer 16, and the residual radioactivity gas purging in the sampling line is clean, to guarantee the real-time of next sample gas.When the nitrogen distribution system is unavailable, then accomplish the purging function by nitrogen cylinder 18.
It is thus clear that; The present invention has the following advantages: the first, adopt stainless steel capillary in containment, to extract minimum gas; Stainless steel capillary has anti-irradiation, measuring body characteristic; Also be not prone to leakage during major accident, even the fracture that under extreme case, occurs outside the containment 30 is leaked, leakage rate also allows 1% of leakage rates less than containment 30.Therefore, on sampling line 12, containment 30 isolation valves can be set, containment 30 isolation stages do not need to isolate after accident, can continue to realize monitoring function; The second, prevent that through the filtrator that is arranged at sampling head 10 stainless steel capillary from stopping up; Three, carry out multidraw through a plurality of sampling heads 10 and measure, utilize solenoid valve 120 to realize the switching controls between the different measuring points, avoid influencing each other between each measuring point sampling line; Four, after each measuring point measurement finishes, sweep, the residual gas in the sampling line is purged totally, guarantee the real-time of sample gas, nitrogen cylinder 18 nitrogen supply (NS) in support through the nitrogen blowback; Five, gas analyzer 16 adopts heat-conducted principle, to guarantee that sample gas is sent in the gas analyzer 16 with best temperature and pressure state; Six, outside containment, take insulation companion heat on the sampling line, remain superheat state, can not cause the measurement result distortion because of water vapor condensation to guarantee sample gas; Seven, gaseous sample Measurement and analysis in gas analyzer 16 is sent containment 30 back to after finishing, and the minimizing radioactivity leaks and is discharged in the environment; Eight, with solenoid valve 120 controls, realize the real-time monitoring of a plurality of sampling spots; Nine, measuring accuracy is high, and range is big: gaseous sample can remain on the optimum working parameter (be after gas arrives module, remained on the temperature and pressure of setting by control system) of sensor in thermal-conductivity type gas analyser 16, analysis precision improves greatly.
In sum; The density of hydrogen monitoring system is taken a sample the atmosphere in containment through sampling head and sampling line (negative pressure) in the containment of the present invention; Measure hydrogen and water vapor concentration in the thermal-conductivity type gas analyser outside containment; The sample gas of having analyzed is sent back in the containment through vacuum pump is counter again, and hydrogen gas sensor and on-site control all are positioned at outside the containment.Owing in abominable containment, there are not the parts of radiation sensitive under the environment; Even under super design reference accident (DEC); Therefore this system also can move reliably, can satisfy density of hydrogen on-line continuous monitoring in the containment after the accident, effectively solved two generation nuclear power generating sets engineering roadblock; Improve the security of unit, also had good and economic simultaneously.
According to the announcement and the instruction of above-mentioned instructions, those skilled in the art in the invention can also carry out suitable change and modification to above-mentioned embodiment.Therefore, the embodiment that discloses and describe above the present invention is not limited to also should fall in the protection domain of claim of the present invention modifications more of the present invention and change.In addition, although used some specific terms in this instructions, these terms are explanation for ease just, the present invention is not constituted any restriction.
Claims (10)
1. density of hydrogen monitoring system in the containment; It is characterized in that: comprise the sampling head that is arranged in the containment, the sampling line that links to each other with sampling head, the gas analyzer that is connected with the sampling line that passes containment; Sampling line is the capillary stainless-steel tube, has on the sampling head to prevent that bulky grain gasoloid or suspension from getting into the filtrator of sampling line.
2. density of hydrogen monitoring system in the containment according to claim 1, it is characterized in that: the external diameter of said capillary stainless-steel tube is 4 ~ 6mm, and internal diameter is minimal to 0.5mm.
3. density of hydrogen monitoring system in the containment according to claim 1; It is characterized in that: said sampling head is a plurality of; Be arranged at the diverse location in the containment respectively, every with sampling line that sampling head is connected on all be provided with the solenoid valve of controlling the pipeline break-make.
4. density of hydrogen monitoring system in the containment according to claim 1 is characterized in that: also comprise with gas analyzer being connected in gas analyzer, to form the vacuum pump of negative pressure.
5. density of hydrogen monitoring system in the containment according to claim 4 is characterized in that: said vacuum pump is connected with gas analyzer through surge tank.
6. density of hydrogen monitoring system in the containment according to claim 4, it is characterized in that: said vacuum pump also is connected with the gas return line that stainless steel capillary is processed, and after the gas return line penetrates containment, directly is communicated with the interior gas of containment.
7. according to density of hydrogen monitoring system in each described containment in the claim 1 to 6, it is characterized in that: said gas analyzer is connected with RAZ through pipeline, and on associated line, is provided with the solenoid valve of controlling the pipeline break-make.
8. density of hydrogen monitoring system in the containment according to claim 7, it is characterized in that: said gas analyzer also is connected with nitrogen cylinder through the pipeline that is provided with solenoid valve.
9. according to density of hydrogen monitoring system in each described containment in the claim 1 to 6; It is characterized in that: said gas analyzer is a thermal-conductivity type gas analyser; Take insulation companion heat on the outer sampling line of containment, remain superheat state to guarantee sample gas.
10. according to density of hydrogen monitoring system in each described containment in the claim 1 to 6, it is characterized in that: the operation of total system is by the outer I&C module controls of barrier shield, and the measuring-signal of gas analyzer shows to master control DCS through cable transmission.
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| CN201110293133A CN102323295A (en) | 2011-09-30 | 2011-09-30 | System for monitoring concentration of hydrogen in containment vessel |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928550A (en) * | 2012-10-19 | 2013-02-13 | 中国船舶重工集团公司第七一八研究所 | Method for measuring hydrogen concentration in containment vessel of nuclear power plant |
| CN102937609A (en) * | 2012-11-01 | 2013-02-20 | 中国船舶重工集团公司第七一八研究所 | System for measuring hydrogen density in nuclear power plant containment vessel |
| CN105299458A (en) * | 2015-12-02 | 2016-02-03 | 中煤科工集团重庆研究院有限公司 | Storage tank system for preparing LNG by oxygen-contained coalbed methane |
| CN106596206A (en) * | 2015-10-19 | 2017-04-26 | 富士电机株式会社 | Sample collection device and sample collection method |
| CN107358984A (en) * | 2017-06-07 | 2017-11-17 | 中国核电工程有限公司 | Gas concentration monitoring system in containment after reactor disaster |
| CN107402170A (en) * | 2016-05-19 | 2017-11-28 | 中国辐射防护研究院 | A kind of the radioaerosol continuous monitoring device and method of the corrosion of acid-resistance material |
| CN107561117A (en) * | 2017-08-22 | 2018-01-09 | 中国船舶重工集团公司第七八研究所 | A kind of hydrogen gas sensor based on thermal conduction principle |
| CN107993731A (en) * | 2017-11-06 | 2018-05-04 | 中国核电工程有限公司 | Gas flammability monitors system in containment after a kind of reactor disaster |
| EP3298610A4 (en) * | 2015-05-18 | 2018-12-26 | Nexceris LLC | Gas monitoring system and method for nuclear reactor |
| CN110517798A (en) * | 2019-08-29 | 2019-11-29 | 中国核电工程有限公司 | A kind of concentration of hydrogen in containment vessel measuring system test device and test method |
| CN110813911A (en) * | 2019-11-18 | 2020-02-21 | 国核工程有限公司 | Cleaning equipment and method for containment vessel of nuclear power plant and nuclear power plant with cleaning equipment |
| CN112461616A (en) * | 2020-11-23 | 2021-03-09 | 三门核电有限公司 | Nuclear power plant containment atmospheric radioactive gas pressurizing and sampling device and method |
| CN113984958A (en) * | 2021-09-23 | 2022-01-28 | 中国核电工程有限公司 | System for analyzing flammability of gas in containment |
| 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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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102928550A (en) * | 2012-10-19 | 2013-02-13 | 中国船舶重工集团公司第七一八研究所 | Method for measuring hydrogen concentration in containment vessel of nuclear power plant |
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| CN102937609A (en) * | 2012-11-01 | 2013-02-20 | 中国船舶重工集团公司第七一八研究所 | System for measuring hydrogen density in nuclear power plant containment vessel |
| CN102937609B (en) * | 2012-11-01 | 2014-10-22 | 中国船舶重工集团公司第七一八研究所 | System for measuring hydrogen density in nuclear power plant containment vessel |
| EP3298610A4 (en) * | 2015-05-18 | 2018-12-26 | Nexceris LLC | Gas monitoring system and method for nuclear reactor |
| CN106596206B (en) * | 2015-10-19 | 2019-03-01 | 富士电机株式会社 | Sample acquisition device and sample acquisition method |
| CN106596206A (en) * | 2015-10-19 | 2017-04-26 | 富士电机株式会社 | Sample collection device and sample collection method |
| CN105299458B (en) * | 2015-12-02 | 2017-07-11 | 中煤科工集团重庆研究院有限公司 | A kind of coalbed methane containing oxygen produces LNG tank system |
| CN105299458A (en) * | 2015-12-02 | 2016-02-03 | 中煤科工集团重庆研究院有限公司 | Storage tank system for preparing LNG by oxygen-contained coalbed methane |
| CN107402170A (en) * | 2016-05-19 | 2017-11-28 | 中国辐射防护研究院 | A kind of the radioaerosol continuous monitoring device and method of the corrosion of acid-resistance material |
| CN107402170B (en) * | 2016-05-19 | 2024-03-22 | 中国辐射防护研究院 | Device and method for continuously monitoring radioactive aerosol for preventing acidic substance corrosion |
| CN107358984A (en) * | 2017-06-07 | 2017-11-17 | 中国核电工程有限公司 | Gas concentration monitoring system in containment after reactor disaster |
| CN107561117A (en) * | 2017-08-22 | 2018-01-09 | 中国船舶重工集团公司第七八研究所 | A kind of hydrogen gas sensor based on thermal conduction principle |
| CN107993731A (en) * | 2017-11-06 | 2018-05-04 | 中国核电工程有限公司 | Gas flammability monitors system in containment after a kind of reactor disaster |
| CN107993731B (en) * | 2017-11-06 | 2021-08-17 | 中国核电工程有限公司 | System for monitoring combustibility of gas in containment after serious accident of reactor |
| CN110517798B (en) * | 2019-08-29 | 2023-10-27 | 中国核电工程有限公司 | Testing device and testing method for hydrogen concentration measuring system in containment |
| CN110517798A (en) * | 2019-08-29 | 2019-11-29 | 中国核电工程有限公司 | A kind of concentration of hydrogen in containment vessel measuring system test device and test method |
| CN110813911A (en) * | 2019-11-18 | 2020-02-21 | 国核工程有限公司 | Cleaning equipment and method for containment vessel of nuclear power plant and nuclear power plant with cleaning equipment |
| CN112461616A (en) * | 2020-11-23 | 2021-03-09 | 三门核电有限公司 | Nuclear power plant containment atmospheric radioactive gas pressurizing and sampling device and method |
| CN113984958A (en) * | 2021-09-23 | 2022-01-28 | 中国核电工程有限公司 | System for analyzing flammability of gas in containment |
| 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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Application publication date: 20120118 |