Oxygen potential of (Pu0.91Am0.09)O2−x

Osaka, Masahiko; Kurosaki, Ken; Yamanaka, Shinşuke

doi:10.1016/j.jnucmat.2006.05.044

Cited by 32 publications

(49 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Osaka et al [7] investigated the oxygen potential of (Pu 0.91 Am 0.09 )O 2−x and found from the slope n of the plot log(p O 2 ) versus log(x) of (Pu 0.91 Am 0.09 )O 2−x that the predominant defect structures in (Pu 0.91 Am 0.09 )O 2−x had not changed significantly from those in AmO 2−x above the boundary O/M ratio. This behavior supported the present results.…”

Section: Resultsmentioning

confidence: 99%

“…In the study of the solid solution of PuO 2−x and AmO 2−x , (Pu,Am)O 2−x , it is suggested that higher oxygen potential of (Pu,Am)O 2−x compared to PuO 2−x is attributable to the instability of tetravalent Am [7]. In addition, although it is also suggested that tetravalent Am is stabilized by tetravalent Pu [7,8], there are no data on this effect for such a phase relation of (Pu,Am)O 2−x .…”

Section: Introductionmentioning

confidence: 99%

“…In addition, although it is also suggested that tetravalent Am is stabilized by tetravalent Pu [7,8], there are no data on this effect for such a phase relation of (Pu,Am)O 2−x .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Phase behavior of PuO2−x with addition of 9% Am

Miwa¹,

Osaka²,

Yoshimochi³

et al. 2007

Journal of Alloys and Compounds

Self Cite

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phase behavior of PuO2−x with addition of 9% Am

Miwa¹,

Osaka²,

Yoshimochi³

et al. 2007

Journal of Alloys and Compounds

Self Cite

View full text Add to dashboard Cite

“…Experimental investigations on the phase relation by Miwa et al [21] and oxygen potential by Osaka et al [22] have shown that oxygen non-stoichiometry should be optimized for this system. Fundamental fabrication process for heterogeneous fuel and appearances of surrogate CeO 2 -MgO and CeO 2 -Mo fuels.…”

Section: Fabrication Process and Fundamental Propertiesmentioning

confidence: 98%

Innovative oxide fuels doped with minor actinides for use in fast reactors

Osaka¹,

Miwa²,

Tanaka³

et al. 2007

WIT Transactions on Ecology and the Environment, Vol 105

View full text Add to dashboard Cite

Research and development of innovative oxide fuels doped with minor actinides for use in fast reactors are underway. Management of minor actinides in a fast reactor fuel cycle is a key technology for successful realization of a sustainable energy supply with a low impact on the environment. Americium-doped oxide fuels are focused on as representative of minor actinides-containing fuel. Two types of fuels were designed and fabrication tests were carried out. Fundamental properties were also investigated. Results can effectively be reflected to establishment of the fast reactor cycle with minor actinides.

show abstract

“…Experimental and calculated EXAFS spectra collected at U L III and Pu L II edges of the U 0.55 Pu 0.45 O 2−x solid solutions obtained from UO 2 -45% PuO 2 pellets sintered at 1700 • C for 4 h and 24 h under respective oxygen potentials of −426 kJ mol −1 and −423 kJ mol −1 (experimental data: 24 h sintering; 4 h sintering; −fit).assumption that for a solid solution U 1−y−z Pu y Am z O 2−x , U +V , Am +IV , Am +III and Pu +IV are present for O/M > 2 − z/2 and that U +IV , Am +III , Pu +IV and Pu +III are present for O/M < 2-z/2. Osaka et al[44] suggested a stabilisation effect of tetravalent Am by tetravalent Pu, as an interaction between Pu and Am. Their model assumed that all Am +III is being reduced before Pu begins to reduce.…”

mentioning

confidence: 99%