水素の成層崩壊に関する数値解析的研究

抄録

It is necessary for nuclear power plants (NPPs) to analyze the hydrogen behavior in the containment vessel in order to prevent such accidents as the hydrogen explosion in the Fukushima Daiichi nuclear power plant. For the purpose, the nuclear engineers make the hydrogen risk assessment through numerically analysis. In this study, we carried out comparative numerical analysis with PANDA benchmark from viewpoint of turbulence (LES) models and mesh system. As the results, it is found that the results with orthogonal mesh is better than those with non-orthogonal and deformed mesh. We also found that the numerical results depend on the turbulence and the LES, especially LISEA, are the better than the RANS models but computationally expensive.