Local Structure Analyses of Molten Lanthanum Trichloride—Alkali Chloride Ternary Systems: Approaches from Fundamentals to Pyrochemical Reprocessing

抄録

Local structure of molten lanthanum trichloride—alkali chloride ternary systems was analyzed in terms of Raman spectroscopy and pulsed neutron diffraction in order to accelerate the realization of pyrochemical reprocessing of nuclear spent fuels. In particular, not only vibrational modes of ionic species existing in molten LaCl₃-ACl-NaCl (A=Li, K, Rb, and Cs) systems but also short range structure in molten LaCl₃-CsCl-NaCl system on behalf of the systems described before were reported in some detail, the salt combinations of which could be of prototype in the reprocessing of UO₂ and/or PuO₂.