Effects of H $_{2}$ /H $_{2}$ O ratio in the sintering atmosphere on the sintering behavior of MOX pellets

Takeuchi, Kentaro ; Kato, Masato ; Sunaoshi, Takeo*

The effect of the O/M ratio on the sintering behavior of MOX pellets was evaluated from the measurement results of O/M ratio and shrinkage ratio of pellets during the sintering process. Change of O/M ratio was caused by approaching the equilibrium condition which was decided from oxygen potential depending on the H $_{2}$ /H $_{2}$ O ratio in the sintering atmosphere. The lower the H $_{2}$ /H $_{2}$ O ratio, the more shrinkage of pellets proceeded at lower temperatures and higher O/M values. The curves of shrinkage rate were observed to have two peaks at 1000 to 1300 $^{circ}$ C and 1400 to 1600 $^{circ}$ C. The shrinkage in the lower temperature range increased with decreasing the H $_{2}$ /H $_{2}$ O ratio. These results suggested that different mechanisms dominate the sintering behavior at each temperature range. It was confirmed that the sintering behavior of MOX pellet depends on H $_{2}$ /H $_{2}$ O ratio and changes significantly with O/M ratio.

Language	:	English
Journal	:	Proceedings of 2010 International Congress on Advances in Nuclear Power Plants (ICAPP '10) (CD-ROM)
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Pages	:	p.1866 - 1873
Publication Year/Month	:	2010/06
Meeting title	:	2010 International Congress on Advances in Nuclear Power Plants (ICAPP '10)
Held date	:	2010/06
Location (city)	:	San Diego
Location (country)	:	U.S.A.
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Keywords	:	no keyword
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Registration No. : BB20092166
JAEA Abstracts No. : 38001101
Paper Submission No. : 7753

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Effects of H $_{2}$ /H $_{2}$ O ratio in the sintering atmosphere on the sintering behavior of MOX pellets