Journal
JOURNAL OF NUCLEAR MATERIALS
Volume 414, Issue 2, Pages 83-87Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2010.12.025
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Pathways to prediction of phase equilibria in He-U-O system at high temperatures based on the single- and two-box molecular dynamics (MD) technique are discussed. Single-box MD simulation of He gas bubble in uranium dioxide has been carried out, helium gas infusion processes studied and its limited efficiency illustrated. More efficient two-box MD simulation technique was applied to study of helium dissolution in stoichiometric UO(2) and non-stoichiometric UO(2 +/- x) single-crystals. Equilibrium solubility of helium in UO(2) and UO(2 +/- x) estimated and compared with experimental data. The deviations from Henry's law at high pressures of helium are discussed. (C) 2010 Elsevier B.V. All rights reserved.
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