[2K07-13] Resilience of Nuclear Structures

[2K13] Development of failure mitigation technologies for improving resilience of nuclear structures

(11)Analysis for enhancing resilience of next-generation nuclear power plants

*Satoshi Futagami¹, Masanori Ando¹, Hidemasa Yamano¹ (1. JAEA)

Keywords:resilience, nuclear structures at evaluated temperature, deformation behavior, PLOHS, reactor vessel, guard vessel

To enhance resilience of next-generation nuclear power plants, the authors have performed a three-dimensional analysis of structures with an earthquake-resistant lower support structure, 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 at extremely high temperatures.