|About this Abstract
||MS&T22: Materials Science & Technology
||Thermodynamics of Materials in Extreme Environments
||Thermodynamic Modelling and Experimental Investigation of LiCl-NaCl-UCl3 and KCl-NaCl-UCl3 Systems
||Liangyan Hao, Soumya Sridar, Thomas Kirtley, Elizabeth Sooby, Wei Xiong
|On-Site Speaker (Planned)
During the electrorefining process, the fuel component uranium and bond sodium will dissolve in the LiCl-KCl electrolyte. Therefore, with the increase of time and weight of processed spent fuel, the composition of the electrolyte changes greatly, which in turn influences its liquidus temperature and other physical properties. To have a better control of the electrorefining process, the CALPHAD method was used in this work to optimize the LiCl-NaCl-UCl3 and KCl-NaCl-UCl3 systems. To fill knowledge gap of phase equilibria in literature, DSC measurements were performed to obtain solidus and liquidus. Whenever experimental information is lacking, the empirical rule is applied to estimate the enthalpy of mixing and provide guidance to the optimization. The calculated phase diagram and thermochemical properties agree well with experimental results. It is expected that this work will contribute to efficiency of the pyroprocessing technology.