To inhibit the diffusion of nuclide in a radioactive waste disposal area.

Metal radioactive waster disposal containers 2 are stored in a reinforced concrete skeleton 1 embedded in the ground together with filling materials 3 for isolation between the disposal containers 2 and between the disposal containers 2 and the skeleton 1. Hydrogen which is produced when the metal disposal containers 2 and the reinforcement of the skeleton are subjected to reduction corrosion by underground water is guided from a vent 4 provided in the skeleton 1 to a hydrogen consuming reactor 5 filled with hydrogen consuming fungi.