Oxygen potentials of plutonium and uranium mixed oxide

Masato Kato, Tetsuya Tamura, Kenji Konashi, Shigenori Aono

Research output: Contribution to journalConference articlepeer-review

45 Citations (Scopus)


The oxygen potentials of (Pu0.3U0.7)O2-x in the near stoichiometric region were measured by a thermogravimetric technique which was used to establish the equilibrium between the oxide phases and H 2/H2O system gas. The experimental results of (Pu 0.3U0.7)O2-x show a consistent variation in PO2 with O/M and temperature and are in agreement with other works. The relationship between the partial oxygen pressure and x in MO2-x was evaluated by the lattice defect theory. The relationship in the hypo-stoichiometric region was x∝PO2-1/2 near the stoichiometric composition, and became x∝PO2-1/3 with a decrease in O/M.

Original languageEnglish
Pages (from-to)235-239
Number of pages5
JournalJournal of Nuclear Materials
Issue number1-3
Publication statusPublished - 2005 Sept 1
EventProceedings of the 11th International Symposium on Thermodynamics of Nuclear Materials -
Duration: 2004 Sept 62004 Sept 9


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