Studies on relocation behavior of molten core materials in the core disruptive accident of sodium-cooled fast reactors, 8; A Series of out-of-pile experiments on fragmentation and cooling behavior of molten core material discharged into the inlet coolant plenum

Matsuba, Kenichi  ; Kato, Shinya  ; Kamiyama, Kenji  ; Ganovichev, D.*; Akayev, A.*; Baklanov, V.*

In order to clarify the fragmentation and cooling behavior of molten core material discharged into a sodium pool whose height and volume are limited, a series of out-of-pile experiments were carried out. In this presentation, based on results of the out-of-pile experiments, possible mechanisms dominating the fragmentation and cooling behavior are discussed.