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Analytical study demonstrates reduced hydrogen concentration in rooms with catalysts, suggesting improved safety measures.
With a storage containing wet radioactive waste such as fuel debris, it is important to reduce the risk of explosion and combustion due to hydrogen generated by radiolysis of water. This study, as a part of the development of simulation technologies for verification of reduction countermeasures and proposal of new countermeasures, conducted a trial simulation of the hydrogen concentration behavior in a room installed the hydrogen recombination catalyst. The simulation using a CFD code focuses on reduction effect of hydrogen concentration by combination to catalyst and vent. It was found that the hydrogen concentration distribution was affected by formation of circulating flows in a room by flow resistance of catalyst and vent.
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Terada et al. (2025) studied this question.
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