Review of design data for safety assessment of Tokai reprocessing plant

Omori, Eiichi; Sudo, Toshiyuki ; not registered; not registered ; not registered; not registered ; Maki, Akira

Through the investigation of the cause of the fire and explosion incident at Bituminization Demonstration Facility of JNC Tokai Works, the lesson learned is that the safety assessment is necessary even for the licensed facilities by recent knowledge. The safety assessment has been conducted for the facilities in Tokai Reprocessing Plant by recent knowledge and operational experience. This report describes the review of the design data for safety assessment of Tokai Reprocessing Plant. The spent fuel inventory, the radio activity balance in the processes, the inventory contained in each equipment, and the evaluation method of public dose were evaluated with the recent data, the new calculation method and the data obtained through the plant operation. The important equipments were selected for safety assessment as for the public dose. The hydrogen generation from radiolysis of solution was also evaluated, and the hydrogen concentration in each equipment was kept lower than the flammable limit except several equipments that are to be improved.