Oxygen potential of (U0.88Pu0.12)O 2±x and (U0.7Pu0.3)O 2±x at high temperatures of 1673-1873 K

M. Kato, K. Takeuchi, T. Uchida, T. Sunaoshi, Kenji Konashi

研究成果: Article査読

18 被引用数 (Scopus)

抄録

The oxygen potential of (U0.88Pu0.12)O 2±x (-0.0119 < x < 0.0408) and (U 0.7Pu0.3)O2±x (-0.0363 < x < 0.0288) was measured at high temperatures of 1673-1873 K using gas equilibrium method with thermo gravimeter. The measured data were analyzed by a defect chemistry model. Expressions were derived to represent the oxygen potential based on defect chemistry as functions of temperature and oxygen-to-metal ratio. The thermodynamic data, ΔGO2, ΔHO2 and ΔSO2, at stoichiometric composition were obtained. The expressions can be used for in situ determination of the oxygen-to-metal ratio by the gas-equilibration method. The calculation results were consistent with measured data. It was estimated that addition of 1 wt.% Pu content increased oxygen potential of uranium and plutonium mixed oxide by 2-5 kJ/mol.

本文言語English
ページ(範囲)120-125
ページ数6
ジャーナルJournal of Nuclear Materials
414
2
DOI
出版ステータスPublished - 2011 7 15

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 材料科学(全般)
  • 原子力エネルギーおよび原子力工学

フィンガープリント

「Oxygen potential of (U<sub>0.88</sub>Pu<sub>0.12</sub>)O <sub>2±x</sub> and (U<sub>0.7</sub>Pu<sub>0.3</sub>)O <sub>2±x</sub> at high temperatures of 1673-1873 K」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル