Studies on relocation behavior of molten core materials in the core disruptive accident of sodium-cooled fast reactors, 4; Effects of test conditions on dispersion and sedimentation of molten-material in a shallow water pool

Emura, Yuki; Matsuba, Kenichi  ; Isozaki, Mikio; Imaizumi, Yuya ; Kamiyama, Kenji  

A series of simulation tests discharging a molten alloy with low-melting point into a shallow water pool is being conducted in order to investigate fuel-coolant interaction and sedimentation behavior of molten core materials on the structure of core inlet coolant plenum in the core disruptive accident of sodium-cooled fast reactors. The present study shows effects of the initial temperature of the molten alloy, the confined coolant volume, etc. on the test results.