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原子炉構造レジリエンスを向上させる破損の拡大抑制技術の開発,15; 次世代原子炉の超高温時におけるレジリエンス向上策

Development of failure mitigation technologies for improving resilience of nuclear structures, 15; Conceptual study for improving resilience of next-generation nuclear power plants under extremely high temperature conditions

二神 敏  ; 安藤 勝訓 ; 山野 秀将   ; 笠原 直人*

Futagami, Satoshi; Ando, Masanori; Yamano, Hidemasa; Kasahara, Naoto*

次世代ナトリウム冷却高速炉における崩壊熱除去系全系統が機能喪失する除熱系喪失事象を対象として、構造解析を実施することにより、原子炉容器とガードベッセルの超高温時の変形挙動を把握し、次世代原子炉のレジリエンス向上策を検討した。

To improve resilience of next-generation nuclear power plants, the authors have performed a structural analysis assuming a protected loss of heat sink event, which may cause all decay heat removal systems to lose their functions immediately after reactor shutdown. The results show how the reactor vessel and guard vessel deform under extremely high temperatures.

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