抄録
In the decommissioning of nuclear power plants, the long-term management of radioactive waste of fuel debris is necessary. In the process, hydrogen which is the flammable gas is generated by the decomposition of water by radiation. Therefore, reducing the concentration of hydrogen gas.is important to ensure the safety of the waste storage container. Then, it was considered that the generated hydrogen and the existed oxygen in the container are recombined with the passive autocatalytic recombiner (PAR) installed in the storage container and returned to water. The objective of the present study is to confirm experimentally and numerically the effectiveness of the waste storage container with PAR on reduction of the hydrogen concentration. In addition, the hydrogen behavior in a container with PAR is clarified and then reflected to the design of the optimum container structure.
