Study on high efficiency separation and recovery of minor actinides

研究了次锕系元素（MA）和裂变产物（FP）在液态金属中的溶解度和活度系数，为评价和优化设计回收MA的还原萃取系统提供了依据。用电化学方法测定了部分镧系元素的活度系数，并与文献值进行了比较，证实了镧系元素的系统性。此外，镧系元素在一种以上的镧系元素和溶剂金属的混合物中的溶解度进行了测量，并发现通过假设金属间化合物在固相中的理想混合行为来解释。作为这项研究的结果，它成为可能，以实现高效率的分离和回收MA的溶质浓度的条件。

Solubility and activity coefficient of minor actinides(MA) and fission products(FP) in liquid metals were investigated for performance assessment and optimal design of reductive extraction systems for MA recovery. The activity coefficient of some lanthanides was measured by an electrochemical method and compared with literature values to confirm systematic nature of lanthanides. Also, the solubility of lanthanides in mixtures of more than one lanthanide and solvent metal was measured and found to be explained by assuming an ideal mixing behavior of intermetallic compounds in the solid phase. As a result of this study, it became possible to give conditions for solute concentrations in order to achieve high efficiency separation and recovery of MA.