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ナトリウム冷却高速炉のガス巻込みに関する研究,2; 適切な数値解析手法の検討

Study on gas entrainment in sodium cooled fast reactors, 2; Examination of appropriate numerical method

伊藤 啓; 堺 公明; 大島 宏之; 田中 伸厚*

Ito, Kei; Sakai, Takaaki; Ohshima, Hiroyuki; Tanaka, Nobuatsu*

ナトリウム冷却高速炉におけるガス巻込み現象の評価を行うために、数値解析に基づいたガス巻込み判定手法の構築を実施している。ガス巻込み基礎実験体系を対象とした解析を行い、解析結果に判定手法を適用して評価を行うことにより、適切な数値解析手法の検討を行い、メッシュ精度や乱流モデル依存性について明らかにした。

Based on numerical simulations, a gas entarainment (GE) evaluation method have been developed to estimate GE occurence in a sodium-cooled fast reactor. In this research, several numerical simulations were conducted on a basic GE experiment and the GE phenomena in the experiments were evaluated by the developing GE evaluation method using the velocity data obtained from simulation results. From the results of the GE evaluation, sensitivities of mesh partition or turbulent modeling on the simulation accuracy were examined.

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