To evaluate the character of the changes in the thermodynamic properties of mixed uranium–plutonium oxide fuel having high reactivity and toxicity, measurements have been performed on uranium–cerium oxides with analogous properties. The electromotive force of a solid-electrolyte galvanic cell and solid-phase coulonometric titration were used to establish the regularities of the variation of the oxygen potential versus the oxygen/metal ratio for the oxide U0.718Ce0.282O2–x . A thermodynamic model of uranium dioxide with elements dissolved in the matrix was developed; the model makes it possible to determine the oxygen potential in a wide interval of temperatures and non-stoichiometry.
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Translated from Atomnaya Énergiya,Vol. 106, No. 4, pp. 195–198, April, 2009.
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Baranov, V.G., Ivanova, N.A. Model for calculating the thermodynamic characteristics of alloyed uranium dioxide. At Energy 106, 247–250 (2009). https://doi.org/10.1007/s10512-009-9159-5
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DOI: https://doi.org/10.1007/s10512-009-9159-5