Abstract: On the decommissioning of Fukushima Dai-ichi nuclear power plant, fuel debris is packed to radioactive waste long-term storage containers. When the fuel debris includes water, since hydrogen (H2) and oxygen are produced by radiolysis of water, H2 concentration in the container increases. Passive Autocatalytic Recombiners (PARs) which is high performance on H2 treatment are developed to reduce the H2 concentration. The present study was conducted to confirm the effectiveness of H2 concentration reduction by the presently developed PARs. From the results, it was found that the current PAR can effectively reduce the H2 concentration.
Keywords: Hydrogen, PAR, Storage container, Reduction of concentration, Development.
