Effect of O/M ratio on sintering behavior of (Pu $_{0.3}$ U $_{0.7}$ )O $_{2-x}$

Nakamichi, Shinya ; Hirooka, Shun ; Kato, Masato ; Sunaoshi, Takeo*; Nelson, A. T.*; McClellan, K. J.*

Oxygen-to-metal ratio (O/M) of uranium and plutonium mixed oxide depends on its oxygen partial pressure. To attain the desirable microstructure and O/M ratio of sintered pellets, it is important to investigate the relation between the sintering behavior and the atmosphere of sintering process. In this study, sintering behavior of (Pu $_{0.3}$ U $_{0.7}$ )O $_{2}$ and (Pu $_{0.3}$ U $_{0.7}$ )O $_{1.99}$ in controlled po $_{2}$ atmosphere were investigated. It was found activation energy of (Pu $_{0.3}$ U $_{0.7}$ )O $_{1.99}$ was higher than that of (Pu $_{0.3}$ U $_{0.7}$ )O $_{2}$ . On the other hand, it was observed grain growth during sintering was suppressed in hypo-stoichiometric composition.

Language	:	English
Journal	:	Journal of Nuclear Materials
Volume	:	535
Number	:
Pages	:	p.152188_1 - 152188_8
Publication Year/Month	:	2020/07
Meeting title	:	Nuclear Materials Conference 2014 (NuMat 2014)
Held date	:	2014/10
Location (city)	:	Clearwater
Location (country)	:	U.S.A.
Patent information	:
PDF	:
Paper URL	:	https://doi.org/10.1016/j.jnucmat.2020.152188
DOI for research data	:
Keywords	:	no keyword
Research Facility	:
Press Release	:
Article of JAEA R&D Review	:
Cooperating Institute	:

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Registration No. : BB20140273
JAEA Abstracts No. : 48001181
Paper Submission No. : 23429

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Effect of O/M ratio on sintering behavior of (PuU)O

Effect of O/M ratio on sintering behavior of (Pu $_{0.3}$ U $_{0.7}$ )O $_{2-x}$