[1H09-12] Melt Behavior 2

[1H09] Deepening Understanding of Ex-Vessel Corium Behavior by Multi-Physics Modeling

(4) Overview and Progress on Spreading Analysis by MPS Method(2)

*Akifumi Yamaji¹, Masahiro Furuya², Yuji Ohishi³, Guangtao Duan¹ (1. Waseda University, 2. Central Research Institute of Electric Power Industry, 3. Osaka University)

Keywords:severe accident of a nuclear reactor, MPS method, ex-vessel corium behavior, corium spreading, MCCI

MPS method (one of the particle methods) is being developed for mechanistic modeling of
ex-vessel corium behavior (spreading and MCCI) by combining with scale-effect test and the
basic UO2 fuel property experiment. The program overview and progress on spreading
analysis by MPS method, including the newly developed crust model and its applications, will be reported.