微量钌在Pu纯化循环中的行为

Behavior of Trace Ruthenium in Plutonium Purification Cycle

摘要: 为了了解钌在Pu纯化循环中的行为，研究了相接触时间、相比、硝酸浓度对钌(Ru)分配比的影响，并通过台架试验研究了流比、料液酸度、洗涤级数、萃取级数、铀浓度对Ru净化的影响。结果表明：流比(2AF∶2AX)、料液(2AF)HNO₃浓度、洗涤级数、萃取级数、铀饱和度对Ru的净化具有显著的影响。台架热试验结果表明，Ru的净化系数高于1 000，远高于设计指标100。

Abstract: In order to know behavior of trace ruthenium in plutonium purification cycle, the influences of the phase contact time, the phase ratio, the concentration of HNO₃ on the extraction of Ru from nitric acid solution and the influences of flow ratio, the concentrations of HNO₃and U in 2AF, the stage number of extraction and scrubbing on the countercurrent extraction process were studied in this work. The results show significant impact of flow ratio (2AF∶2AX), the concentration of HNO₃ and U in 2AF, the stage number of extraction and scrubbing. The bench scale hot test shows that the decontamination coefficient of Ru exceeds 1 000, much higher than the designed value.