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Effect of UO2+x Powders Produced at Different Oxidation Temperatures on the Properties of Pellet

  • Yoo, Ho-Sik (Fuel Technology Center, KEPCO Nuclear Fuel Co. LTD) ;
  • Lee, Seung-Jae (Fuel Technology Center, KEPCO Nuclear Fuel Co. LTD) ;
  • Kim, Jae-Ik (Fuel Technology Center, KEPCO Nuclear Fuel Co. LTD) ;
  • Song, Kun-Woo (Korea Atomic Energy Research Institute)
  • 발행 : 2003.05.01

초록

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.

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