Thermodynamic behavior of CrF2 corrosion product in the molten LiF-ThF4 salt system

Journal article (2024)

Authors

T. Dumaire European Commission Joint Research Centre, RST/Reactor Physics and Nuclear Materials - AS
O. Walter European Commission Joint Research Centre
Ondrej Beneš European Commission Joint Research Centre
Jean Christophe Griveau European Commission Joint Research Centre
Eric Colineau European Commission Joint Research Centre
R. Konings RST/Reactor Physics and Nuclear Materials - AS , European Commission Joint Research Centre
A.L. Smith RST/Reactor Physics and Nuclear Materials - AS
Research Group
RST/Reactor Physics and Nuclear Materials (AS) (TU Delft)
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Published Date

2024

Language

English

Faculty

Applied Sciences

Department

RST/Radiation, Science and Technology

Research Group

RST/Reactor Physics and Nuclear Materials

Abstract

This work examines the thermochemistry of the chromium difluoride CrF2 corrosion product in the molten [Formula presented] fuel salt system. Through a combination of experimental investigations and thermodynamic modeling assessment, the study elucidates the thermodynamic properties, phase diagram equilibria, and overall thermodynamic 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 [Formula presented], [Formula presented], and [Formula presented] systems. Then, thermodynamic models were developed using the CALPHAD method based on the quasichemical model in the quadruplet approximation.