[G] Nuclear Materials

[174] Thermal Stability of Dislocation Loops in Neutron-Irradiated Reactor Pressure Vessel Steel during In-situ Annealing

*Yufeng Du¹, Kenta Yoshida¹, Yusuke Shimada¹, Takeshi Toyama¹, Koji Inoue¹, Kazuto Arakawa², Tomoaki Suzudo³, Milan Konstantinovic　J.⁴, Gerard Robert⁵, Somei Ohnuki⁶, Yasuyoshi Nagai¹ (1. IMR Tohoku University、2. Shimane University、3. JAEA、4. SCK-CEN、5. Tractabel ENGINE、6. USTB)

Keywords:Dislocation loops、In-situ observation、RPV steel

Dislocation loop evolution depending on temperature in neutron irradiated RPV steel was investigated by in-situ observation under WB-STEM. The transition process of the dislocation loops was analyzed.