[2G08-12] Fukushima Daiichi NPS Accident

[2G12] The effect of the molten metal amount and the outlet on corium spreading

*Ryo Yokoyama¹, Shunichi Suzuki¹, Koji Okamoto¹ (1. Univ. of Tokyo)

Keywords:Severe Accident, Fuel Debris, Decommissioning, Corium Spreading

On the PCV fuel debris in the Fukushima Daiichi NPPs (1F NPPs), it is considered that the different amount of fuel debris has been generated between all units. Furthermore, there is a possibility that the degradation of the RPV bottom might be diffrent due to the diffrent accident progression in 1F NPPs. In this study, the effect of the molten metal amount and the outlet on the spreading and deposition mode of corium spreading phenomena was investigated.