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Method for measuring hydrogen concentration in containment vessel of nuclear power plant

A technology for containment and nuclear power plants, which is applied in the direction of chemical analysis using catalysis, can solve problems such as low reliability, unintentional ignition of hydrogen, and insecurity, and achieve the effects of large measurement range, reduced energy consumption, and simple method.

Active Publication Date: 2013-02-13
718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Problems solved by technology

[0007] For the measurement of the hydrogen concentration in the containment under the accident conditions of nuclear power plants, there are some particularities. First, the concentration of hydrogen in the containment space is relatively high, up to 10%. If an extreme accident occurs in a nuclear power plant, the Therefore, the application of the above-mentioned catalytic reaction method that requires power supply for heating under such conditions may cause the measurement to fail normally, and the reliability is low. These have caused the above-mentioned method to be used to measure the hydrogen concentration in the containment In addition, the hydrogen-oxygen catalytic reaction occurs by heating, which is unsafe for measuring the hydrogen concentration in an environment with an explosion limit of 4% or more, and it is easy to cause hydrogen to be ignited unintentionally, and the safety is poor

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  • Method for measuring hydrogen concentration in containment vessel of nuclear power plant
  • Method for measuring hydrogen concentration in containment vessel of nuclear power plant
  • Method for measuring hydrogen concentration in containment vessel of nuclear power plant

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with specific examples, but is not limited thereto.

[0027] 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;

[0028] 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 reaction temperature rise is propo...

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Abstract

The invention discloses a method for measuring hydrogen concentration in a containment vessel of a nuclear power plant, belonging to the field of flammable and explosive gas concentration measuring technique. The method comprises the steps as follows: (1) carrying out combination reaction on hydrogen and oxygen in the containment vessel of the nuclear power plant under normal temperature conditions; (2) respectively measuring the ambient temperature T1 and the combination reaction temperature T2 in the containment vessel of THE nuclear power plant; and (3) calculating by adopting a formula to obtain the hydrogen concentration. The method is simple, safe and reliable, and large in measurement range.

Description

technical field [0001] The invention relates to a method for measuring the concentration of hydrogen in a containment vessel of a nuclear power plant, and 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 mea...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/10
Inventor 罗沙覃亮董强李琳
Owner 718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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