2021 Fall Meeting

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Oral presentation

V. Nuclear Fuel Cycle and Nuclear Materials » 502-1 Nuclear Materials, Degradation, Radiation Effects, and Related Technology

[3D03-08] Irradiation Effect

Fri. Sep 10, 2021 10:10 AM - 11:55 AM Room D

chair: Naoyuki Hashimoto (Hokkaido Univ.)

10:10 AM - 10:25 AM

[3D03] Diffusivity of Nickel in Fe under 3MeV Fe Irradiation at 673K Studied by Atom Probe Tomography

*Xinrun Chen1, Phongsakorn Park Tom1, Ba Vu Chinh Nguyen1, Kenta Murakami1,2 (1. Nagaoka Univ. of Tech., 2. UTokyo)

Keywords:Diffusivity, RPV, Irradiation, APT

For the development of Mn-Ni-Si clustering model in reactor pressure vessels (RPVs), nickel films on iron based alloy were irradiated by 2.8 MeV Fe ions at various temperatures and the depth distribution of Ni atoms was measured using atom probe tomography (APT). The diffusion coefficient of Ni into Fe at 673K under 10-4 dpa/s of Fe irradiation was estimated to be 8.1×10-15 cm2/s, which is larger than the estimation from thermal diffusion.