Oxygen potential measurement of (Pu 0.928Am0.072)O 2-x at high temperatures

Taku Matsumoto, Tatsumi Arima, Yaohiro Inagaki, Kazuya Idemitsu, Masato Kato, Kyoichi Morimoto, Takeo Sunaoshi

Research output: Contribution to journalArticle

Abstract

The oxygen potentials of (Pu0.928Am0.072)O2-x were measured as a function of oxygen to metal ratio (O/M) in the temperature range from 1473 to 1873 K by the gas equilibrium method using thermogravimetry. The measured data were about 200 kJ/mol higher in the O/M ratio range from 2.00 to 1.96 and about 50 kJ/mol higher in the reducing region (below O/M ratio = 1.94) compared with those of PuO2-x. The measured oxygen potentials were analyzed by the point defect chemistry method. From this analysis, the oxygen potential of (Pu0.928Am0.072)O2-x was represented as a function of O/M ratio and temperature and calculated results were consistent with the measured data.

Original languageEnglish
Pages (from-to)1296-1302
Number of pages7
JournalJournal of Nuclear Science and Technology
Volume52
Issue number10
DOIs
Publication statusPublished - Oct 3 2015

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Oxygen
oxygen
equilibrium methods
Temperature
Point defects
thermogravimetry
point defects
Thermogravimetric analysis
chemistry
temperature
Metals
Gases
gases
metals

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

Cite this

Oxygen potential measurement of (Pu 0.928Am0.072)O 2-x at high temperatures. / Matsumoto, Taku; Arima, Tatsumi; Inagaki, Yaohiro; Idemitsu, Kazuya; Kato, Masato; Morimoto, Kyoichi; Sunaoshi, Takeo.

In: Journal of Nuclear Science and Technology, Vol. 52, No. 10, 03.10.2015, p. 1296-1302.

Research output: Contribution to journalArticle

Matsumoto, Taku ; Arima, Tatsumi ; Inagaki, Yaohiro ; Idemitsu, Kazuya ; Kato, Masato ; Morimoto, Kyoichi ; Sunaoshi, Takeo. / Oxygen potential measurement of (Pu 0.928Am0.072)O 2-x at high temperatures. In: Journal of Nuclear Science and Technology. 2015 ; Vol. 52, No. 10. pp. 1296-1302.
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AU - Kato, Masato

AU - Morimoto, Kyoichi

AU - Sunaoshi, Takeo

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