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Temperature accelerated dynamics study of migration process of oxygen defects in UO2

journal contribution
posted on 2023-10-25, 05:32 authored by T Ichinomiya, B P Uberuaga, K E Sickafus, Y Nishiura, M Itakura, Y Chen, Y Kaneta, M Kinoshita
We studied the migration dynamics of oxygen point defects in UO2 which is the primary ceramic fuel for light-water reactors. Temperature accelerated dynamics simulations are performed for several initial conditions. Though the migration of the single interstitial is much slower than that of the vacancy, clustered interstitial shows faster migration than those. This observation gives us important insight on the formation mechanism of high-burnup restructuring, including planar defects and grain sub-division (the rim structure), found in UO2. © 2008 Elsevier B.V.

History

Journal

Journal of Nuclear Materials

Volume

384

Pagination

315 - 321

Location

Amsterdam, The Netherlands

ISSN

0022-3115

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

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