Oxygen potentials of (U $_{0.685}$ ,Pu $_{0.270}$ ,Am $_{0.045}$ )O $_{2-x}$ solid solutions

None

Osaka, Masahiko; Sato, Isamu; Namekawa, Takashi; Kurosaki, Ken*; Yamanaka, Shinsuke*

Amを含有するMOX燃料の酸素ポテンシャルを測定した。H $_{2}$ O/H $_{2}$ , CO $_{2}$ /H $_{2}$ 気相平衡を用いた熱重量分析により、1123K, 1273K及び1423Kおける酸素ポテンシャルを測定した。測定値をMOX燃料と比べた場合、わずか4.5%のAmであっても酸素ポテンシャルは非常に高いことが分かった。

Oxygen potentials of (U,Pu)O $_{2-x}$ containing AmO $_{2-x}$ , (U $_{0.685}$ Pu $_{0.270}$ Am $_{0.045}$ )O $_{2-x}$ , were measured as functions of the oxygen to metal (O/M) ratios and temperatures by hermogravimetric analysis (TGA) and discussed from thermodynamic viewpoints. The (U $_{0.685}$ Pu $_{0.270}$ Am $_{0.045}$ )O $_{2-x}$ solid solution was prepared by a traditional powder metallurgical route. Oxygen partial pressure (pO $_{2}$ ) was adjusted in the region from 10 $^{-22}$ to 10 $^{-8}$ MPa by using CO $_{2}$ /H $_{2}$ and H $_{2}$ O /H $_{2}$ equilibria. Changes of microgram order in the specimen weight were continuously monitored with a TGA apparatus and the dependences of oxygen potentials on the O/M ratios were obtained at 1123K, 1273K and 1423K. The oxygen potentials of (U $_{0.685}$ Pu $_{0.270}$ Am $_{0.045}$ )O $_{2-x}$ were significantly higher than those in (U $_{0.7}$ Pu $_{0.3}$ )O $_{2-x}$ . The partial molar entropy and enthalpy of oxygen have been calculated and compared with those of Am O $_{2-x}$ , (Am $_{0.05}$ U $_{0.05}$ ) O $_{2-x}$ , and (U $_{0.7}$ Pu $_{0.3}$ )O $_{2-x}$ . Finally, the oxygen potential isotherms of (U $_{0.685}$ ,Pu $_{0.270}$ ,Am $_{0.045}$ )O $_{2-x}$ were examined in terms of defect structure.

使用言語	:	English
掲載資料名	:	Journal of Alloys and Compounds
巻	:	397
号	:	1-2
ページ数	:	p.110 - 114
発行年月	:	2005/07
発表会議名	:
開催年月	:
開催都市	:
開催国	:
キーワード	:	no keyword

特許データ	:
PDF	:

論文URL	:	https://doi.org/10.1016/j.jallcom.2005.01.024 この論文を読む・探す
研究データの公開先DOI	:
使用施設	:
広報プレスリリース	:
論文解説記事 (成果普及情報誌)	:
受委託・共同研究相手機関	:

Access	:	- Accesses
Web of Science® Times Cited Count	:	被引用回数：評価・統計等のため最新の被引用回数を確認したい場合は、直接Web of Science®をご確認ください。 http://www.webofknowledge.com/wos
InCites™	:	パーセンタイル：78.69 分野：Chemistry, Physical
Altmetrics	:

登録番号 : 09-2004-0314
抄録集掲載番号 :
論文投稿番号 : 1243

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.

Oxygen potentials of (U,Pu,Am)O solid solutions

None

Oxygen potentials of (U $_{0.685}$ ,Pu $_{0.270}$ ,Am $_{0.045}$ )O $_{2-x}$ solid solutions