ハニカム冷却デバイスによる大型ＰＷＲのＩＶＲ技術の創出と今後の計画

抄録

It is expected that IVR (In-Vessel Retention) for a large PWR is feasible if we can make critical heat flux (CHF) high. The target of this study is to develop an IVR technology using honeycomb cooling devise which can make CHF more than double. For this target, the following subjects are to be examined and we will develop a road map for this technology; ・Uncertainty evaluations for melting debris relocation and for heat flux distribution along lower head wall of reactor pressure vessel ・Heat flux performance of honeycomb cooling devise under two-phase natural circulation ・Feasibility study for implementing method of the devise and for a safety system under actual reactor situations