| Effect of UO2+x Powders Produced at Different Oxidation Temperatures on the Properties of Pellet |
| Ho-Sik Yoo, Seung-Jae Lee, Jae-Ik Kim, Kun-Woo Song1 |
Fuel Technology Center, KEPCO Nuclear Fuel Co. LTD
1Korea Atomic Energy Research Institute |
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| ABSTRACT |
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Characteristics of $UO_{2+x}$ powders oxidized at different temperatures were examined. Pellets were fabricated by adding these oxidation powders and their properties were also investigated. Particle size of the $UO_{2+x}$ powders decreased with increasing oxidation temperature while surface area increased. Only the powders oxidized at 35$0^{circ}C$ enhanced the strength of green pellet. However, 35$0^{circ}C$ oxidized powders added pellet had many surface defects. The difference of shrinkage rate between the oxidized and UO$_2$ powders was thought to be the cause of them. |
| Key words:
$UO_2$ pellet, ${U_3}{O_8}$, Green strength, Oxidized powder |
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