Device for rapidly measuring hydrogen at plurality of points after containment accident of nuclear power plant and realization method of device

Abstract

The invention discloses a device for rapidly measuring hydrogen at a plurality of points after a containment accident of a nuclear power plant. The device comprises a sample gas sampling probe, a water vapor and hydrogen concentration measuring device, a first buffering gas tank and a sample gas pressurizing and recycling device, wherein the sample gas sampling probe is used for sampling sample gas in a containment of the nuclear power plant and removing gas sol and liquid-state water in the sample gas; the water vapor and hydrogen concentration measuring device is used for measuring concentrations of water vapor and hydrogen in the sample gas respectively and removing the water vapor; the first buffering gas tank is used for temporarily storing the sample gas without the water vapor and stabilizing a gas flow; and the sample gas pressurizing and recycling device is used for pressurizing the sample gas in the first buffering gas tank and then conveying the sample gas back into the containment of the nuclear power plant. The device can be used for accurately and rapidly measuring the concentrations of the water vapor and the hydrogen in the containment of the nuclear power plant, and provides reliable guarantees for real-time monitoring of the hydrogen concentration in a severe environment under an emergency condition.

Description

technical field [0001] The invention relates to the field of security detection of nuclear power plants, in particular to a multi-point rapid hydrogen measurement device after a nuclear power plant containment accident and an implementation method thereof. Background technique [0002] After the Fukushima nuclear accident in Japan, the hydrogen risk control under the severe accident conditions of the containment of nuclear power plants has attracted great attention at home and abroad, and higher requirements have been put forward for the hydrogen safety devices of nuclear power plants. In the accident state of a nuclear power plant, a large amount of hydrogen will be produced due to the zirconium-water reaction in the early stage of the accident, the decomposition of water in the middle and late stages of the accident, and the reaction between the core melt and concrete. Detonation can seriously threaten the integrity of nuclear power plant safety barriers. Therefore, every...

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Problems solved by technology

The hydrogen storage material measurement method uses the change of capacitance after the material absorbs hydrogen to indirectly calculate the hydrogen concentration in the shell, but because the hydrogen storage material is easily poisoned, it needs to be heated to remove hydrogen after a measurement, resulting in a long measurement period; the passive hydrogen recombiner measurement The method is to measure the hydrogen concentration in the shell by using the temperature rise of the catalytic plate under different hydrogen concentrations. Seriously inaccurate measurement results

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