Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volume 266, Issue 12-13, Pages 3008-3012Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nimb.2008.03.154
Keywords
nuclear fuel; UO2; alpha-emitters; interstitial loops; electron microscopy; interstitial re-solution; loop coalescence
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New experimental size distributions are presented for interstitial-type dislocation loops in (U, Pu)O-2 samples after 4 and 7 years of self-irradiation along with a new model. For this model, the work of Hayns has been extended to doped materials and to take into account additional phenomena, namely re-solution and coalescence as applied to gas bubble precipitation. The calculations are compared to the experimental size distributions obtained by means of Transmission Electron Microscopy for two different storage times. The role of re-solution and coalescence is discussed based on this model. This constitutes a basis for modelling the high burn-up structure (HBS) formation which is a consequence of the accumulation of radiation damage in nuclear fuels. (c) 2008 Elsevier B.V. All rights reserved.
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