On-line regular inspection regeneration device and method based on hydrogen-oxygen composite catalytic plate in nuclear power plant containment

Abstract

The invention discloses an online regular check regeneration device based on a hydrogen-oxygen composite catalytic plate in nuclear power plant containment. The device comprises a through sealing element arranged on a containment wall, a monitoring system, an introduction-in gas pipe and a gas path system, wherein the monitoring system penetrates through the through sealing element and is used for detecting the temperature of the catalytic plate; the introduction gas pipe penetrates through the through sealing element and used for ventilation; and the gas path system is arranged outside the containment and arranged on the introduction gas pipe. The invention further provides an online regular check and regeneration method based on the device. According to the invention, improvement is performed based on the nuclear power plant containment; according to the chemical principle of dehydrogenation reaction, whether the catalytic performance is normal is judged according to detected temperature change of the catalytic plate during reaction; the concept is novel and ingenious, and the device and the containment are organically combined by the through sealing element, so that crush resistance and sealing performance of the containment are guaranteed; and besides, by means of the gas path system, gas supply is effectively regulated and controlled, and use safety of the device and the containment is guaranteed sufficiently.

Description

technical field [0001] The invention relates to the field of security detection of nuclear power plants, in particular to an on-line regular inspection regeneration device and method for a hydrogen-oxygen composite catalytic plate based on an in-service passive hydrogen recombiner in a containment vessel of a nuclear power plant. Background technique [0002] After the Fukushima nuclear accident in Japan, in order to avoid or reduce the risk of hydrogen explosion in the containment of nuclear power plants, the current international and domestic second-generation and third-generation nuclear power plants have taken corresponding preventive measures. Dozens of Passive Hydrogen Recombiners (PARs) are distributed in the interior, no external energy source is required during design basis accidents and severe accidents, they can be automatically started, and the hydrogen concentration can be reduced below the safe level. The basic structure of the passive hydrogen recombiner can b...

AI Technical Summary

Problems solved by technology

In order to ensure power generation and reduce radiation, nuclear power units shut down for a very long time interval, usually at least one and a half years, and the existing regular inspection technology cannot track the complex environmental conditions of the catalytic plate of the passive hydrogen recombiner in the containment for a long time in real time. performance changes under

On the other hand, even if the hydrogen-oxygen composite catalytic plate is taken out after shutdown, the staff may be exposed to radiation from radioactive substances and affect health

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