[2I12-14] Debris Cooling Behavior

[2I14] Study on Boiling Heat Transfer Characteristics in Debris Beds

3rd:Effects of Volumetric Heated Rate and Bed Height on Critical Heat Flux

*Taira Kawakami¹, Keishi Sakurada¹, Hiroto Sakashita¹, Ayako Ono², Hiroyuki Yoshida² (1. Laboratory of Nuclear System Safety Engineering, Division of Energy and Environmental Systems, Hokkaido University, 2. Japan Atomic Energy Agency)

Keywords:Severe accident, Bottom and volume heated debris beds, Boiling heat transfer, Critical heat flux, Visualization

This study measured the critical heat fluxes on a bottom surface for bottom and volume heated debris beds. The data were obtained by varying particle size, volume heated rate and bed height. Further, the boiling behaviors were observed from the back of a transparent heating surface via total reflection technique.