Improved Ionic Model of Liquid Uranium Dioxide

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dc.creatorGryaznov, Victor
dc.creatorIosilevski, Igor
dc.creatorYakub, Eugene
dc.creatorFortov, Vladimir
dc.creatorHyland, Gerard J.
dc.creatorRonchi, Claudio
dc.date2009-05-16
dc.date.accessioned2026-07-07T13:15:55Z
dc.date.available2026-07-07T13:15:55Z
dc.descriptionThe paper presents a model for liquid uranium dioxide, obtained by improving a simplified ionic model, previously adopted to describe the equation of state of this substance [1]. A "chemical picture" is used for liquid UO2 of stoichiometric and non-stoichiometric composition. Several ionic species are considered here: U(5+), U(4+), U(3+), O(2-) and O(-). The ions are described as charged hard-spheres of different diameters. Coulomb interaction of ions is taken into account according to the modified Mean Sphere Approximation (MSA). The main result of the new model is the appearance of natural "plasma" equivalent, which, from the theory, is directly related to the definition of oxygen potential in liquid UO(2+x). The features of the model make it possible to describe non-congruent phase equilibrium (and evaporation) in uranium dioxide, as well as other relevant phenomena characterising the phase equilibrium in chemically active matter. First calculation results are discussed.
dc.description5 pages, no figures, 2 tables, Proceedings of Int. Conf. "Strongly Coupled Coulomb Systems", Sent-Malo, France, 1999
dc.identifierhttps://arxiv.org/abs/0905.2703
dc.identifierhttp://arxiv.org/abs/0905.2703
dc.identifierJournal de Physique IV 10, Pr5, 363-367 (2000)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/230627
dc.subjectChemical Physics
dc.titleImproved Ionic Model of Liquid Uranium Dioxide
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