[2J10-16] Numerical Analysis

[2J15] Development of Numerical Simulation Method to Evaluate Heat Transfer of Fuel Debris in Air Cooling

(4) Application of Effective Thermal Conductivity Models of Porous Medium

*Shinichiro Uesawa¹, Susumu Yamashita¹, Mitsuhiko Shibata¹, Hiroyuki Yoshida¹ (1. JAEA)

Keywords:Porous medium model, Natural convection, Air cooling, Fuel debris, Fukushima Daiichi nuclear power station

To evaluate the heat transfer of fuel debris in the primary containment vessel of the Fukushima Daiichi nuclear power station, JAEA has developed a numerical simulation method with JUPITER. The previous work reported that JUPITER was appropriate for flow analysis of a porous medium. In this report, we report experimental and numerical results for natural convection in a system containing the porous medium to validate effective thermal conductivity models of the porous medium in JUPITER. The comparison result indicated that the use of a geometric mean model rather than a series model and a parallel model as an effective thermal conductivity model is appropriate for the natural convective heat transfer analysis in the systems containing the porous medium.