[1K05-08] Source term and Filtered Vent

[1K05] Evaluation of Fission Products Released during the NPP Severe Accident

(17)Improvement of Cs deposition model in the SAMPSON code

*Ayumi Itoh¹, Karasawa Hidetoshi¹, Marco Pellegrini¹, Okada Hidetoshi¹, Naitoh Masanori¹ (1. The Institute of Applied Energy)

Keywords:SAMPSON, cesium , chemisorption, Fukushima NPP accident, Fission products

Evaluation of cesium distribution released during the severe accident is important for decommissioning because of its large contribution to the gamma radioactivity. In this presentation, the chemisorption model of cesium hydroxide to form insoluble compounds on the structure surface will be reported with the new findings obtained after the Fukushima Nuclear Power Plant accident.