[1G06-10] Fukushima Daiichi Accident

[1G06] Estimation of the In-Depth Debris Status of Fukushima Unit-2 and Unit-3 with Multi-Physics Modeling

(1)Overview of the Project

*Akifumi Yamaji¹, Masahiro Furuya¹, Yuji Ohishi², Ikken Sato³, Hirofumi Fukai¹, Xin Li³, Hiroshi Madokoro³ (1. Waseda Univ., 2. Osaka Univ., 3. JAEA)

Keywords:severe accident of a nuclear reactor, decommissioning of Fukushima reactors, MPS method, levitation method, in-depth status evaluation of the fuel debris

Deepening understanding of the current status of the damaged Fukushima reactors is important for the safe and efficient decommissioning of the reactors. The presenting research team (Waseda Univ., Osaka Univ., JAEA) are carrying out multi-physics modeling with particle method, simulated small-scale experiment and acquisition of high temperature melt properties with levitation method to investigate in-depth status evaluation of the fuel debris in the pedestal region of Unit-2 and Unit-3. This presentation gives the overview and planning of the project.