Method for preventing failure of catalytic plates of passive hydrogen recombiner

Abstract

The invention discloses a method for preventing failure of catalytic plate of a passive hydrogen recombiner, which comprises the step of detecting the catalytic plates of the passive hydrogen recombiner, and the detection comprises the following steps: A1, equally dividing the interior of the passive hydrogen recombiner into three spaced areas according to the arrangement direction of the catalytic plates; and A2, extracting at least three adjacent catalytic plates from each area, and conducting hydrogen elimination efficiency detection on at least three catalytic plates as a group. According to the method for preventing the failure of the catalytic plates of the passive hydrogen recombiner, the catalytic plates in the passive hydrogen recombiner are partitioned, the catalytic plates in each area are randomly extracted for function detection, the performance state of the catalytic plates in the whole hydrogen recombiner is judged, the hydrogen recombiner which does not meet a pre-regeneration standard is regenerated, it is ensured that the catalytic plates are in a high catalytic performance state in the unit operation period, and the problem that the performance is reduced and even the catalytic capacity is completely lost due to attachment of volatile organic compounds, dust, aerosol and other toxicants is solved.

Description

technical field [0001] The invention relates to the technical field of nuclear power, in particular to a method for preventing the failure of a catalytic plate of a passive hydrogen recombiner. Background technique [0002] Under severe accident conditions in nuclear power plants, zirconium-water reaction produces hydrogen or the core melt reacts with concrete to produce hydrogen, carbon monoxide and other combustible gases. The concentration is reduced below the safety limit, thereby avoiding the failure of the third barrier—the containment vessel—caused by the hydrogen explosion. The passive hydrogen recombiner has no active parts, automatically catalyzes hydrogen elimination, and does not need power supply and other supporting systems. Its working principle is: the metal shell of the hydrogen recombiner can guide the airflow upward through the hydrogen recombiner, and a A frame of many parallel vertical catalyst plates, which are coated with active catalyst, is inserted....

AI Technical Summary

Problems solved by technology

The catalytic plate is built in the drawer of the passive hydrogen recombiner, and exposed to the atmosphere in the containment, it will inevitably adhere to VOC organic matter, dust, aerosol and other substances, and these substances adsorbed on the surface will block the active microspheres of the catalytic plate. The pores prevent hydrogen from contacting the active centers on the catalytic plate, and the catalytic performance of the catalytic plate will decrease. In severe cases, the catalytic plate will fail and lose its catalytic ability.

Images