[3D01-07] Evaluation for Accident Reactor

[3D06] Annealing effects on strength and microstructure of LWR steels during severe accident

(2)Effect of heating on the microstructure and strength of the steels for reactor internals during the severe accident

*kohei Noguchi¹, Kengo Hashimoto¹, Seiya Suzuki¹, Tomoyasu Karino¹, Ayato Nagayama¹, Shiro Jitsukawa¹ (1. Nitional Institute of Technology Fukushima college)

Keywords:Fukushima Daiichi, Reactor core internal components, Irradiation damage, Temperature history, Ion irradiation, Microstructure

Microstructures of the core internal components are expected to be affected during the exposure to elevated temperatures by the severe accident. The microstructure and hardness seem to be applicable to estimate the temperature history of the components during the accident. Microstructure and hardness of 316ss after ion-irradiation + annealing has been examined.