The Possible use of short half-life noble gas fission products for measurement of criticality and identification of plutonium in fuel debris canister

Riyana, E. S.   ; 奥村 啓介 ; 坂本 雅洋 ; 松村 太伊知 ; 寺島 顕一  

Riyana, E. S.; Okumura, Keisuke; Sakamoto, Masahiro; Matsumura, Taichi; Terashima, Kenichi

Fuel debris has inherent neutron sources due to mostly spontaneous fissions. Therefore, the fuel debris inside a canister can be seen as a subcritical system with fixed neutron sources. A depletion calculation for the fuel debris inside the canister has been performed. The calculation results show the activity ratio of Kr-to-Xe in the fuel debris canister depending on the material compositions and effective neutron multiplication factor.