Calculated thermodynamic properties of GdCl3 in LiCl-KCl eutectic molten salt

JOURNAL OF NUCLEAR MATERIALS

卷:508

Article

Zhou, Wentao^1,2  Wang, Yafei³  Zhang, Jinsuo^2,3  Khafizov, Marat² 

[1] Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, Shanghai 200240, Peoples R China

[2] Ohio State Univ, Dept Mech & Aerosp Engn, Nucl Engn Program, Columbus, OH 43210 USA

[3] Virginia Polytech Inst & State Univ, Dept Mech Engn, Nucl Engn Program, Blacksburg, VA 24061 USA

关键词: LiCl-KCl-GdCl3;    Phase diagram;    Solubility;    Apparent potential;    Activity coefficient;   

DOI  :  10.1016/j.jnucmat.2018.05.030

来源: Elsevier

【 摘 要 】

The thermodynamic behaviors of lanthanides in molten salt are significant for the pyroprocessing of spent nuclear fuel. In this study, the ternary phase diagram of LiCl-KCl-GdCl3 system was assessed by the CALPHAD method using two-sublattice model. The liquidus surfaces were calculated and plotted from 720 K to 1000 K. The solubility of GdCl3 from 720 K to 850 K was determined from the phase diagram developed. The activity coefficient and apparent potential of GdCl3 with a concentration up to 3 mol% were also investigated. They both show a dependence on the concentration. From 0 to 3 mol%, the apparent potential increases by about 3% and the activity coefficient increases by about 50%. (C) 2018 Elsevier B.V. All rights reserved.

【 授权许可】

Free