Oxygen potentials of plutonium and uranium mixed oxide

Masato Kato; Tetsuya Tamura; Kenji Konashi; Shigenori Aono

doi:10.1016/j.jnucmat.2005.04.048

Oxygen potentials of plutonium and uranium mixed oxide

Masato Kato, Tetsuya Tamura, Kenji Konashi, Shigenori Aono

International Research Center for Nuclear Materials Science

Research output: Contribution to journal › Conference article › peer-review

37 Citations (Scopus)

Abstract

The oxygen potentials of (Pu_0.3U_0.7)O_2-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 _0.3U_0.7)O_2-x show a consistent variation in P_O2 with O/M and temperature and are in agreement with other works. The relationship between the partial oxygen pressure and x in MO_2-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 language	English
Pages (from-to)	235-239
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	344
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jnucmat.2005.04.048
Publication status	Published - 2005 Sep 1
Event	Proceedings of the 11th International Symposium on Thermodynamics of Nuclear Materials - Duration: 2004 Sep 6 → 2004 Sep 9

ASJC Scopus subject areas

Nuclear and High Energy Physics
Materials Science(all)
Nuclear Energy and Engineering

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title = "Oxygen potentials of plutonium and uranium mixed oxide",

abstract = "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.",

author = "Masato Kato and Tetsuya Tamura and Kenji Konashi and Shigenori Aono",

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T1 - Oxygen potentials of plutonium and uranium mixed oxide

AU - Kato, Masato

AU - Tamura, Tetsuya

AU - Konashi, Kenji

AU - Aono, Shigenori

PY - 2005/9/1

Y1 - 2005/9/1

N2 - 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.

AB - 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.

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DO - 10.1016/j.jnucmat.2005.04.048

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JF - Journal of Nuclear Materials

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T2 - Proceedings of the 11th International Symposium on Thermodynamics of Nuclear Materials

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ER -

Oxygen potentials of plutonium and uranium mixed oxide

Abstract

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