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Concentration measuring system of hydrogen in containment vessel

A technology of concentration measurement and containment, which is applied in the field of hydrogen concentration measurement system in containment, can solve problems such as poor reliability, unsafety, and complex system composition, and achieve the effects of avoiding combustion and explosion, simple algorithm, and simple system composition

Active Publication Date: 2014-12-03
718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Problems solved by technology

[0007] The disadvantages of this system are: (1) In order to start the high-efficiency hydrogen-oxygen combination reaction, the catalytic electrode needs to be continuously heated by external power supply, which is unsafe when the hydrogen concentration is high, so it can only measure 4% below the hydrogen explosion limit Hydrogen concentration below
(3) The system composition is relatively complex and the reliability is poor

Method used

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  • Concentration measuring system of hydrogen in containment vessel
  • Concentration measuring system of hydrogen in containment vessel
  • Concentration measuring system of hydrogen in containment vessel

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Embodiment Construction

[0043] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but is not limited thereto.

[0044] The catalytic combination reaction of hydrogen and oxygen releases a large amount of heat, and the exothermic heat of the reaction causes the temperature to rise. Proportional relationship, therefore, the reaction temperature rise is proportional to the amount of hydrogen participating in the reaction;

[0045] In the containment of a nuclear power plant, the amount of hydrogen participating in the reaction is related to the concentration of hydrogen, the greater the concentration of hydrogen, the greater the amount of hydrogen participating in the reaction, and the smaller the concentration of hydrogen, the smaller the amount of hydrogen participating in the reaction. There is also a proportional relationship between the amount of hydrogen and the concentration of hydrogen, and then it is deduced that the r...

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Abstract

The invention discloses a concentration measuring system of hydrogen in a containment vessel, belonging to the technical field of concentration measurement of flammable and explosive gasses. The concentration measuring system comprises a temperature acquisition unit, a signal processing unit and a hydrogen concentration display unit, wherein the signal processing unit comprises an analog value input module, a CPU (Central Processing Unit) module and an analog value output module; and the temperature acquisition unit, the analog value input module, the CPU module, the analog value output module and the hydrogen concentration display unit are connected in sequence. The concentration measuring system is low in energy consumption, simple to assemble and capable of safely and reliably realizing continuous measurement of concentration of hydrogen in the containment vessel under accident conditions of a nuclear power plant.

Description

technical field [0001] The invention relates to a hydrogen concentration measurement system in a containment vessel, which belongs 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 measurement system to monitor the h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/22
Inventor 罗沙覃亮祝维燕李琳黄永生牛立宏
Owner 718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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