[2F06-09] Criticality Safety

[2F07] Criticality safety analysis in falling down of fuel debris in water

*Takeshi Muramoto¹, Jun Nishiyama², Toru Obara² (1. School of Environment and Society Transdisciplinary Science and Engineering Nuclear engineering Tokyo Institute of Technology, 2. Laboratory for Advanced Nuclear Energy, Institute of Innovative Research, Tokyo Institute of Technology)

Keywords:Fukushima Diichi Nuclear Power Plant, Decommissioning, Fuel debris, Moving Particle Semi-Implicit Method, Criticality safety

In this study, criticality safety analysis reflecting the accumulation process of fuel debris in water was carried out by combining the Moving Particle Semi-implisit (MPS) method which is one of the computional fluid dynamics and criliticality safety calculation.