[2K07-13] Resilience of Nuclear Structures

[2K07] Development of failure mitigation technologies for improving resilience of nuclear structures

(5)Proposal of failure mitigatgion method by fracture control

*Naoto Kasahara¹, Hidemasa Yamano², Izumi Nakamura³, Kazuyuki Demachi¹, Takuya Sato¹, Masakazu Ichimiya¹ (1. The University of Tokyo, 2. JAEA, 3. NIED)

Keywords:Nuclear reactor structures, Resilience, Beyond design basis events, Fracture control, Next generation reactors

This study proposes mitigation methods of failure consequence against beyond design basis events by fracture control concept. Fracture control mitigates high impact failure modes on safety by prior failure low impact failure modes. For example, this concept was applied to next generation fast reactor plants under loss of heat removal accident and excessive earthquake.