2416 炉心溶融時の半球殻ギャップ内熱流動現象に対する数値解析手法の開発

概要

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The numerical analysis method for the thermal hydraulic phenomena in a hemispherical narrow gap was developed, because it is necessary to evaluate the heat removal capability due to the water ingression with phase changing into the gap formed between the reactor pressure vessel (RPV) and the molten core debris. The analytical model is based on a modified drift flux model for the multi-dimensional two-phase flow. The problem modeled as two-phase flow in the narrow gap with the two-dimensional spherical coordinates, assuming the saturated condition of gas and liquid phases. Results of the numerical analysis indicated that the numerical analysis method developed in this study could represent the basic two-phase flow phenomenon relevant to gap cooling mechanism.
社団法人日本機械学会の論文
2000-07-31