Thermodynamic behavior of CrF2 corrosion product in the molten LiF-ThF4 salt system
This work examines the thermochemistry of the chromium difluoride CrF2 corrosion product in the molten LiF – ThF4 fuel salt system. Through a combination of experimental investigations and thermodynamic modeling assessment, the study elucidates the thermodynamic properties, phase diagram equilibria, and overall thermo-dynamic behavior of CrF2 corrosion product, following dissolution from a structural material to the molten salt fuel environment. In this work, two different synthesis methods were developed for pure CrF2, further allowing to experimentally measure the phase equilibria in the LiF – CrF2, CrF2 – ThF4, and LiF – CrF2 – ThF4 systems. Then, thermodynamic models were developed using the CALPHAD method based on the quasichemical model in the quadruplet approximation
DUMAIRE Thomas;
WALTER Olaf;
BENES Ondrej;
GRIVEAU Jean-Christophe;
COLINEAU Eric;
KONINGS R. J. M.;
SMITH Anna;
2024-08-29
PERGAMON-ELSEVIER SCIENCE LTD
JRC138974
1873-2984 (online),
0364-5916 (print),
https://www.sciencedirect.com/science/article/pii/S0364591624000646?via%3Dihub,
https://publications.jrc.ec.europa.eu/repository/handle/JRC138974,
10.1016/j.calphad.2024.102722 (online),
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