[2G10-14] Fuel Debris

[2G10] Modification of STACY for study of criticality characteristics of fuel debris

(6) Progress on manufacture and construction of the modified STACY

*Tomoyuki Maekawa¹, Masakazu Seki¹, Masato Sumiya¹, Shouhei Araki¹, Takahiko Murakami¹, Kenta Hasegawa¹, Takashi Mori², Junichi Ishii¹, Fuyumi Kobayashi¹, Kazuhiko Izawa¹ (1. JAEA, 2. TNS)

Keywords:Fukushima Dai-ichi NPP, modified STACY, Critical Experiment, Fuel Debris

As previously reported, to clarify critical characteristics of fuel debris, the Static Experiment Critical Facility (STACY) is being converted to the heterogenous thermal system using fuel rods and light water moderator from the homogenous system using solution fuel. Seismic reinforcement of the support structure of the core tank started in 2022. This report presents progress on manufacture and construction of the modified STACY in 2021 and 2022.