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Publication . Article . 2022

Cu precipitation in electron-irradiated iron alloys for spent-fuel canisters

Qigui Yang; Zhongwen Chang; Luca Messina; Nils Sandberg; Nicolas Castin; Amine Yousfi; Elin Toijer; +5 Authors
Open Access
English
Published: 01 Dec 2022
Publisher: HAL CCSD
Abstract

International audience; In this work, the Cu clustering in Fe under irradiation is investigated using experiments, cluster dynamics and atomistic kinetic Monte Carlo (AKMC) simulations. In experiments, cast iron and model FeCu alloy samples were irradiated with 2 MeV electrons for 143 h at 140 °C. The post-irradiation microstructure was characterized using atom probe tomography. Cluster dynamics and AKMC methods were used to simulate the Cu clustering under the same irradiation conditions. Both simulation methods show satisfactory agreement with experiments, lending strength to the validity of the models. Finally, the Cu clustering in spent-fuel repository conditions for 10$^5$ years at 100 °C was simulated using both methods. The results indicate that potential hardening by Cu clustering is insignificant over 10$^5$ years.

Subjects

[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], Other Physics Topics, Annan fysik, Nuclear Energy and Engineering, General Materials Science, Nuclear and High Energy Physics

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