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,28; 次世代原子炉の超高温時のレジリエンスを向上する受動安全構造

Development of failure mitigation technologies for improving resilience of nuclear structures, 28; Passive safety structure 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*

次世代炉のレジリエンス向上に資するため、炉停止直後に崩壊熱除去系全系統が機能喪失する除熱系喪失事象(LOHRS)を対象とした構造解析を実施し、超高温時における受動安全構造を検討した。

To improve resilience of next-generation nuclear power plants, the authors have performed structural analyses assuming a protected loss of heat sink event, which may cause all decay heat removal systems to lose their functions immediately after reactor shutdown. From the results of these analysis, the authors developed a passive safety structure under extremely high temperatures.