Whole region analysis for sodium-heated steam generator including cover gas volume

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堺 公明; 伊藤 啓; 山口 彰; 岩崎 隆*

Sakai, Takaaki; Ito, Kei; Yamaguchi, Akira; Iwasaki, Takashi*

ナトリウム加熱蒸気発生器内の熱流動評価のため、カバーガス領域を含むSG内全領域を対象とした解析手法(MSGコード)を開発した。検証のため、伝熱管形状を模擬した3次元解析を実施し、2次元のMSGコードの解析結果を比較評価した。また、「もんじゅ」にて測定したSGシュラウド温度との比較を実施し、精度よく予測することを確認した。

Numerical analysis method for a sodium-heated steam generator (SG) was developed for thermal-hydraulics evaluation of the whole region in SG including a cover gas volume. Two-dimensional analysis method for the SG (MSG code) was modified to extend to the cover gas region. In order to verify the calculated temperature profile in the cover gas region, three-dimensional analysis by the Fluent-3D code was performed for the cover gas region. In addition, shroud temperatures measured at the SG in the prototype Fast Breeder Reactor (FBR)