Safety concerning partial modification of fuel reprocessing plant of Power Reactor and Nuclear Fuel Development Corporation

The Nuclear Safety Commission following the investigation, recognized the safety of this modification on which the report was presented from the Committee on Examination of Nuclear Fuel Safety on August 8, 1979, and submitted a report to the Prime Minister on August 13, 1979, about the partial modification of the nuclear fuel reprocessing plant of the Power Reactor and Nuclear Fuel Development Corporation. The safety evaluation was conducted by the special sectional meeting on fuel reprocessing in the Committee on Examination of Nuclear Fuel Safety. This meeting was composed of eighteen experts, and was divided to A group in charge of equipments, accident analysis and aseismatic design, and B group in charge of radiation management and radiation exposure management. The content of the partial modification is to construct newly a facility for developing krypton recovery technique. Emphasis was placed on the aseismatic structure, the countermeasure to explosion the management of radioactive material release and the personal radiation exposure dose under the hypothetical accident condition, in this safety evaluation. The dynamic analysis of class A buildings and equipments was conducted for the aseismatic safety, and tritium release in the sea was investigated for radiation management. Concerning radiation exposure, beta ray and gamma ray dose were estimated under the accident condition due to the abnormal operation of a raw material gas compressor. (Nakai, Y.)