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Ultimate strength of a thin wall tee for sodium cooled fast reactors under seismic loads

地震荷重下における高速炉用薄肉ティ配管の終局強度

渡壁 智祥; 高橋 英樹*

Watakabe, Tomoyoshi; Takahashi, Hideki*

設計条件を越える過酷な地震荷重を想定した場合の最終的な振る舞いを把握すること、また、現行設計が終局強度と比べてどの程度の余裕を見込んでいるかを明確にすることは耐震健全性を確実なものにするという観点から重要である。本研究では、高速炉用薄肉ティ配管を対象にした破壊試験や解析評価を通じて、破損様式、動的応答挙動、動的非弾性解析による破損予測の精度、既存設計規格に含まれる安全裕度について検討した。

To ensure the seismic integrity of Sodium Cooled Fast Reactors, both confirming the ultimate strength under a high-level earthquake beyond the design condition and clarifying the design safety margin up to ultimate strength have been focused as important issues. In this study, a series of dynamic failure tests of a thin wall tee for Sodium-Cooled Fast Reactors was conducted. Some discussions related to the thin wall tee are provided on the failure mode under seismic load, dynamic response behavior, accuracy of fatigue prediction by dynamic elastic-plastic analysis, and a safety margin of fatigue evaluation which is included in conventional design rule.

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分野:Engineering, Mechanical

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