[1K07-12] Mitigation of Molten Core Concrete Interaction

[1K12] Studies on safety improvement in nuclear power plant severe accidents: enhancement of molten core coolability and mitigation of molten core concrete interaction

(6)Development of molten core spreading model

*Nobuhide Hara¹, Takuo Oda¹, Keisuke Yoshida¹, Hironori Noguchi¹, Koichi Tanimoto¹, Hiroshi Goda¹, Junichi Takeuchi¹ (1. MHI)

Keywords:Molten Corium, CFD, MCCI, Spreading

In severe accidents, spreading length of the molten core on the floor of the container vessel is affected by viscosity change, and gas generation from the floor material. Accurate prediction of molten core spreading length is important for the safety enhancement. In this research, simulation method including viscosity change and gas generation was developed. Validation results of spreading length of VE-U7 is presented in this paper.