[2I01-05] Fukushima Daiichi

[2I01] Evaluation of Fission Products Released during the NPP Severe Accident

25. FP Behavior Analysis in the PCV of the Unit 1-3 with SAMPSON Code

*Hidetoshi Karasawa¹, Shunsuke Uchida¹, Chiaki Kino¹, Marco Pellegrini¹, Masanori Naito¹ (1. IAE)

Keywords:nuclear power plant, severe accident, source term, fission product

FP behavior in the PCV and WW of the Unit 3 was analyzed for about 500 hours after the shutdown with the SAMPSON code. The deposited amounts for each chemical form of FPs were calculated. The differences of the deposited amounts among three units were discussed based on the accident scenarios. The validity of thermal equilibrium calculations to determine the chemical form of FPs was discussed.