[1K01-04] PRA 1

[1K01] Level 1 PRA for Design Works of External Vessel Storage Tank in Advanced Loop-Type Sodium-Cooled Fast Reactor

*Hidemasa Yamano¹, Kenichi Naruto², Kenichi Kurisaka¹, Hiroyuki Nishino¹ (1. Japan Atomic Energy Agency, 2. NESI Inc.,)

Keywords:Sodium-cooled fast reactor, External vessel storage tank , Probabilistic risk assessment, Fuel damage frequency, Accident sequence

Spent fuels are kept in an external vessel storage tank (EVST) filled with sodium for fuel handling in sodium-cooled fast reactors. This study performed Level 1 PRA for the EVST designed in an advanced loop-type reactor in order to identify dominant accident sequences leading to fuel failure and to quantify fuel damage frequency.