[2O06-08] Reactor Pressure Vessel Steels 2

11:40 AM - 11:55 AM JST(2:40 AM - 2:55 AM UTC)

[2O08] Prediction and Extension of Lifetime of Reactor Pressure Vessel(2) Status and Challenges of Phase Diagrams Related to Ni-Si-Mn Precipitates

*Yoshitaka Matsukawa¹, Hideki Yuya⁵, Minako Endou⁵, Hiroaki Muta², Fumihiro Nakamori², Ryuta Kasada³, Kenta Yoshida³, Mitsutaka Sato³, Kiyohiro Yabuuchi⁴, Masatake Yamaguchi⁶ (1. Kumamoto University, 2. Osaka University, 3. Tohoku University, 4. Kyoto University, 5. Chubu Electric Power Inc., 6. Japan Atomic Energy Agency)

Keywords:

pressure vessel,materials,microstructure,precipitation,phase diagram

Validity of existing phase diagrams related to Ni-Si-Mn precipitates in the RPV steel has been examined in depth using experimental data obtained from single-phase ingots of Ni-Si-Mn intermetallic compounds fabricated by means of arc-melting.