[2I07-09] FP and Diffusion

[2I07] Evaluation of Fission Products Released during the NPP Severe Accident

23. FP behavior analysis in the PCV of the Unit 2 with SAMPSON code

*Hidetoshi Karasawa¹, Shunsuke Uchida¹, Chiaki Kino¹, Marco Pellegrini¹, Masao Chaki¹, Masanori Naito¹ (1. Institute of Applied Energy)

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

FP behavior in the PCV and WW of the Unit 2 was analized for about 500 hours afer the shutdown with the SAMPSON code. The deposited amouts for each chemical form of FPs were calculated. The amout of FP deposion in a leak pass was evaluated from the amount of FPs leaked to the building. The deposition of Cs and I in the PCV and S/C as well as the deposition in the leak pass was discussed.