Rig Trial Study on U and Pu Co-recovery Process in Centrifugal Contactor

The high specific activity of fast reactor MOX spent fuel will leads to serious solvent degradation, so the contact time needs to be shorten. A rig trial of U and Pu co-recovery process was performed in centrifugal contactor. The results show that when contact time in single stage is 20 s, the yields of U and Pu in extraction-scrub process are higher than 99.99%, respectively, and the yields of U and Pu in co-stripping process are 99.99% and 99.94%, respectively. The risk of the third phase generation and polymerization and precipitation of Pu can be prevented.