Thermodynamics of separation of praseodymium and neodymium employing liquid low-melting metals and alloys is considered. Pr/Nd separation factors on liquid Ga, In, Bi, and Ga-In eutectic were calculated from the thermodynamic data. The obtained results are compared with the literature data on experimentally determined separation factors on “traditional” liquid metals: Bi, Zn, and Cd. It is shown that one-stage selective extraction of praseodymium or neodymium from the mixture using any of the mentioned metals is not possible. In the separation process of lanthanides from minor actinides using a chloride molten salt–liquid metal system, cerium group lanthanide fission products will be accumulated in the salt phase.
Thermodynamics of Nuclear Waste Reprocessing: Separation of Lanthanides Using Liquid Metals and Alloys
Manuscript received July 24, 2014; final manuscript received February 6, 2015; published online May 20, 2015. Assoc. Editor: Jay F. Kunze.
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Melchakov, S. Y., Yamshchikov, L. F., Volkovich, V. A., and Osipenko, A. G. (May 20, 2015). "Thermodynamics of Nuclear Waste Reprocessing: Separation of Lanthanides Using Liquid Metals and Alloys." ASME. ASME J of Nuclear Rad Sci. July 2015; 1(3): 031003. https://doi.org/10.1115/1.4029790
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