Fundamental study on release and chemical behaviors of fission products during severe accident

Osaka, Masahiko  

Research program for chemical behavior of fission products during severe accident is introduced. The goal is to construct a database for FP chemistry at each stage of the nuclear power station. In-situ measurement techniques of the FP chemical form are developed for those just after release from fuel and deposited onto the structural materials. Reproduction test for FP release and transport behaviors are performed using irradiated fuels for the chemical form determination by means of the developed techniques for in-situ chemical form determination. Several preliminary results such as B effects on deposited FP are also given.