[2F09-12] Safety Analysis

[2F10] Study on discharge behavior of molten core materials in core on core disruptive accidents of sodium cooled fast reactors

Consideration on discharge behavior through a sodium-filled channel with an internal structure

*Shinya Kato¹, Kenichi Matsuba¹, Kenji Kamiyama¹, Anatoly Mikisha², Assan Akayev², Alexandr Vurim², Viktor Baklanov² (1. JAEA, 2. NNC)

Keywords:Sodium cooled fast reactor, Core disruptive accident, Molten core material, relocation phase, Discharge behavior

In order to enrich experimental knowledge of discharge behavior of molten core materials through a sodium-filled channel in core disruptive accidents of sodium cooled fast reactors, an out-of-pile experiment was conducted, in which molten alumina was used as a molten-fuel simulant and it penetrated into a sodium-filled channel with an internal structure reducing a flow area. In this presentation, consideration on effects of the internal structure on melt discharge-behavior will be presented based on experimental results.