Temperature accelerated dynamics study of migration process of oxygen defects in UO $_{2}$

Ichinomiya, Takashi*; Uberuaga, B. P.*; Sickafus, K. E.*; Nishiura, Yasumasa*; Itakura, Mitsuhiro ; Chen, Y.*; Kaneta, Yasunori*; Kinoshita, Motoyasu

We studied the migration dynamics of oxygen point defects in UO $_{2}$ 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 UO $_{2}$ .

Language	:	English
Journal	:	Journal of Nuclear Materials
Volume	:	384
Number	:	3
Pages	:	p.315 - 321
Publication Year/Month	:	2009/02
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Paper URL	:	https://doi.org/10.1016/j.jnucmat.2008.12.040
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Keywords	:	no keyword
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Cooperating Institute	:	文部科学省

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Web of Science® Times Cited Count	:	Times Cited Count： If you would like to get the latest times cited, please access the Web of Science®. http://www.webofknowledge.com/wos
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Registration No. : AA20080940
JAEA Abstracts No. : 37000481
Paper Submission No. : 5478

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