Chemical diffusion coefficient calculation of U3+ in LiCl-KCl molten salt
WT Zhou and JS Zhang, PROGRESS IN NUCLEAR ENERGY, 91, 170-174 (2016).
Self-diffusion coefficient denotes the intrinsic diffusion of elements without the chemical gradient; generally, it is different from the chemical diffusion coefficient that is used in Fick's law. However, the self-diffusion coefficient can be converted to the chemical diffusion coefficient by considering the concentration-dependent activity coefficient of solute. In this study, the multiple time origins method was applied to calculate the self-diffusion coefficient of U3+ in LiCl- KCl eutectic salt at different temperatures and concentrations. The chemical diffusion coefficient was obtained based on the calculated results and thermodynamic theory. Calculated results show that self- diffusion coefficient, decreases with concentration however chemical diffusion coefficient indicates to change little initially but appears to increase followed by decrease later within the concentration range of 0-3 at%. (C) 2016 Elsevier Ltd. All rights reserved.
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