The influence of the temperature and Ga-In alloy composition on the separation of uranium from neodymium in molten Ga-In/3LiCl-2KCl system during the recycling of high-level waste

• Published in: Journal of nuclear materials Vol. 509; pp. 313 - 317
• Main Authors: Novoselova, Alena, Smolenski, Valeri
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.10.2018; Elsevier BV
• Subjects: Activity coefficients; Alloy systems; Alloys; Chemical compounds; Gallium; Gallium base alloys; Gallium-indium alloys; Indium; Molten salts; Neodymium; Salt; Separation; Separation factor; Temperature; Thermodynamic properties; Thermodynamics; Uranium; Separation factor; Uranium; Gallium-indium alloys; Neodymium; Thermodynamic properties; Molten salts
• ISSN: 0022-3115; 1873-4820
• DOI: 10.1016/j.jnucmat.2018.06.040

The experimental values of the equilibrium potentials ENd(Ga−In) and EU(Ga−In)vs. Cl−/Cl2 reference electrode in fused 3LiCl-2KCl eutectic at the temperature range (from 723 to 823) K by potentiometric method at zero current were measured. The apparent standard potentials of Nd(Ga-In) and U(Ga-In) alloys in fused Me(Ga-In)/3LiCl-2KCl system were calculated. Neodymium and uranium activity coefficients and Nd/U separation factor in gallium-indium alloys containing 40 and 70 wt % indium was determined. The efficiency of separation of Nd from U was estimated. [Display omitted] •The experimental values of the equilibrium potentials Nd(Ga-In) and U(Ga-In) alloys at the temperature range 723–823 K were measured.•The apparent standard potentials of Nd(Ga-In) and U(Ga-In) alloys were calculated.•Activity coefficients of Nd and U in Ga-In alloys of different composition were determined.•The effect of indium concentration in Ga-In alloys on separation factor of Nd/U couple was observed in liquid metal/molten salt systems.