密閉容器内の水素濃度低減技術開発のための基礎研究

抄録

Regarding the storage of fuel debris accompanying the decommissioning of the Fukushima Daiichi Nuclear Power Plant, management of hydrogen gas generated by radiolysis of water is indispensable. For this reason, it is important to maintain the concentration of hydrogen in sealed vessels below the explosion limit in order to improve the safety of long-term waste storage containers. Then, it was considered that the generated hydrogen is combined with oxygen by the passive autocatalytic recombiner (PAR) and return to water. Basic experiments were performed to investigate the reduction performance of hydrogen concentration of a sealed container with PAR and Preliminary numerical simulations were carried out to predict hydrogen behavior in the container. The present study shows the results of the basic experiments and preliminary numerical simulations.