Oxygen Potentials of Pultonium and Uranium Mixed Oxide

Kato, Masato ; Tamura, Tetsuya*; Aono, Shigenori

The oxygen potentials of (Pu $_{0.3}$ U $_{0.7}$ )O $_{2-X}$ were measured by thermogravimetric equilibrium measurement in the range of the temperature from 800 to 1350 in Ar/H $_{2}$ /H $_{2}$ O or He/H $_{2}$ /H $_{2}$ O mixture gas flow. The experimental results of (Pu $_{0.3}$ U $_{0.7}$ )O $_{2-X}$ are in good agree with the other works. The relationship between the partial oxygen pressure (PO $_{2}$ ) and X in MO $_{2-X}$ was analized based on lattice defect theory. The oxygen potential of (Pu $_{0.3}$ U $_{0.7}$ )O $_{2-X}$ was modeled by lattice defect theory using the data of the literature and this work. The resulting equation well reproduces the oxygen potential-temperature data for (Pu $_{0.3}$ U $_{0.7}$ )O $_{2-X}$ .

Language	:	English
Journal	:	Proceedings of 11th Symposium on Thermodynamics of Nuclear Materials (STNM-11)
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Pages	:	P. 81
Publication Year/Month	:	2004/00
Meeting title	:	11th International Symposium on Thermodynamics of Nuclear Materials (STNM-11)
Held date	:	2004/09
Location (city)	:	Karlsruhe
Location (country)	:	Germany
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Keywords	:	no keyword
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Registration No. : 08-2003-1027
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