2021年春の年会
2021年3月17日〜3月19日オンライン
2021年春の年会
2021年3月17日〜3月19日オンライン
[1A02]Estimation of the In-Depth Debris Status of Fukushima Unit-2 and Unit-3 with Multi-Physics Modeling(7)Preliminary evaluation of debris relocation and interaction with pedestal structures in Fukushima Unit-3 with MPS method
*Xin Li1, Akifumi Yamaji1, Ikken Sato2, Masahiro Furuya1, Hiroshi Madokoro2, Hirofumi Fukai1, Yuji Ohishi3(1. Waseda Univ., 2. JAEA, 3. Osaka Univ.)
The decommissioning of Fukushima Daiichi (1F) Nuclear Power Plants requires knowledge of the in-depth debris status within the pedestals of 1F. As part of the Nuclear Energy Science & Technology and Human Resource Development Project (2019-2021), the Moving Particle Semi-implicit (MPS) method is being developed for simulation of multi-component liquid / solid relocation with solid-liquid phase changes. The developments include parallelization and calculation cost reduction strategies. A Preliminary evaluation of debris relocation and interaction with pedestal structures in Fukushima Unit-3 has been carried out with the developed MPS method in 1/10-scaled geometry. The preliminary results show that the structures can hold up the debris at ~2-3 meters above the containment floor with sufficient vapor cooling from the debris surface provided.