Numerical simulation for cooling by natural convection in a closed space containing porous materials

Ito, Koki*; Sano, Yoshihiko*; Kuwahara, Fujio*; Uesawa, Shinichiro; Yoshida, Hiroyuki

no journal, , 

To estimate the thermal behavior of fuel debris in the primary containment vessel of the Fukushima Daiichi Nuclear Power Station, we have developed a numerical simulation method for analyzing the thermal behavior of fuel debris during air cooling. Since fuel debris is assumed to be a porous material, by using a porous medium model, the numerical simulation was conducted to simulate the natural convection in a closed vessel with porous materials. The simulation was validated by comparing it with the experiment in JAEA.