Article ID Journal Published Year Pages File Type
7965574 Journal of Nuclear Materials 2015 7 Pages PDF
Abstract
To investigate what atomic properties largely determine vulnerability to He embrittlement at grain boundaries (GB) of bcc metals, we introduce a computational model composed of first principles density functional theory and a He segregation rate theory model. Predictive calculations of He embrittlement at the first wall of the future DEMO fusion concept reactor indicate that variation in the He embrittlement originated not only from He production rate related to neutron irradiation, but also from the He segregation energy at the GB that has a systematic trend in the periodic table.
Related Topics
Physical Sciences and Engineering Energy Nuclear Energy and Engineering
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