[1G01-04] Fast Reactor Safety

[1G03] Studies on relocation behavior of molten core materials in the core disruptive accident of sodium-cooled fast reactors

(10)Analysis on fragmentation and cooling behavior in a limited volume sodium pool

*Hatsuki Matsushita¹, Ren Kobayashi¹, Takaaki Sakai¹, Shinya Kato², Ken-ichi Matsuba², Kenji Kamiyama² (1. Tokai Univ., 2. JAEA)

Keywords:Sodium-cooled fast reactor, Core disruptive accident, Relocation of molten core material, SIMMER-III

Analyses were carried out for sodium experiments to clarify fragmentation and cooling behavior of molten core material impinging to a horizontal structure in a sodium pool during core disruptive accident of sodium-cooled fast reactors. As a result of comparison with the experiments, it was analyzed even in the limited volume sodium condition, the simulated molten core material showed the solidification mechanism with cooling acceleration by the fragmentation after the impinging to the plate.