System for measuring hydrogen density in nuclear power plant containment vessel

A nuclear power plant and containment technology, applied in the system field of measuring the hydrogen concentration in the containment of nuclear power plants, can solve the problems of inability to guarantee measurement accuracy, unstable air flow, and unsafety, etc., and achieve safe, reliable and fast measurement in the measurement process and stable, large measurement range

Active Publication Date: 2013-02-20
中国船舶集团有限公司第七一八研究所
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Problems solved by technology

[0007] The disadvantages of this system are: (1) The upper limit of the measured hydrogen concentration is below 4%, and it is unsafe to use it at a higher hydrogen concentration, and the ignition or explosion source of explosive gas will be formed during the power supply or heating process; (2) In the event of an accident Under working conditions, the CO gas in the containment will react with the catalytic electrode, and the measurement accuracy cannot be guaranteed; (3) The probe cover is made of porous material, the gas diffuses into the probe through permeation, and the gas flow cannot be kept stable

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  • System for measuring hydrogen density in nuclear power plant containment vessel
  • System for measuring hydrogen density in nuclear power plant containment vessel
  • System for measuring hydrogen density in nuclear power plant containment vessel

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Embodiment Construction

[0031] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but is not limited thereto.

[0032] A system for measuring the hydrogen concentration in the containment of a nuclear power plant, including: a hydrogen concentration acquisition unit, a pressure acquisition unit, a signal processing unit, and a hydrogen concentration display unit; wherein, the signal processing unit includes: an analog input module, a CPU module, an analog output module;

[0033] The hydrogen concentration acquisition unit and the pressure acquisition unit are respectively connected to the analog input module, and the analog input module, the CPU module, the analog output module, and the hydrogen concentration display unit are connected in sequence;

[0034] Hydrogen concentration acquisition unit: measure the hydrogen concentration in the containment of the nuclear power plant, and output the concentration electrical signal ...

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Abstract

The invention discloses a system for measuring hydrogen density in a nuclear power plant containment vessel and belongs to the technical field of density measurement of flammable and explosive gas. The system comprises a hydrogen density collection unit, a pressure collection unit and a signal processing unit. The hydrogen density collection unit and the pressure collection unit are connected with the signal processing unit respectively. The system is safe and reliable in measurement process. A hydrogen sensor in the system adopts palladium-nickel alloy and is capable of avoiding interference of CO and other gas in the containment vessel. A sampler can continuously provide media to be measured and with stable flow and ensures quick and stable measurement.

Description

technical field [0001] The invention relates to a system for measuring the concentration of hydrogen in a containment vessel of a nuclear power plant, belonging to the technical field of concentration measurement of inflammable and explosive gases. Background technique [0002] A large amount of hydrogen will be produced under accident conditions in nuclear power plants. The source of hydrogen is: 1) In the early stage of the accident, zirconium-water reaction produces hydrogen at a high rate. 2) In the middle and late stages of the accident, the radiation decomposition of water, the reaction of core melt and concrete will also produce a large amount of hydrogen. The accumulation of a large amount of hydrogen may make the hydrogen concentration in the containment vessel exceed the explosion limit of 4%, and there is a danger of explosion. In order to avoid hydrogen deflagration accidents and destroy the integrity of the containment, it is necessary to build a hydrogen measu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/04G01N27/22
Inventor 罗沙徐月覃亮蒋李君戴舒文刘静
Owner 中国船舶集团有限公司第七一八研究所
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