Thermodynamic investigations of the NaI-CsI, KI-CsI, and NaF-CsI pseudo-binary systems

Journal article (2024)

Authors

N. L. Scuro University of Ontario Institute of Technology
Ben Fitzpatrick University of Ontario Institute of Technology
E. Geiger Canadian Nuclear Laboratories, ON, University of Ontario Institute of Technology
M. Poschmann Canadian Nuclear Laboratories, ON, University of Ontario Institute of Technology
T. Dumaire RST/Reactor Physics and Nuclear Materials - AS , European Commission Joint Research Centre
O. Beneš European Commission Joint Research Centre
M. H.A. Piro University of Ontario Institute of Technology
Research Group
RST/Reactor Physics and Nuclear Materials (AS) (TU Delft)
Copyright: © 2024 N. L. Scuro, B. W.N. Fitzpatrick, E. Geiger, M. Poschmann, T. Dumaire, O. Beneš, M. H.A. Piro
DOI
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https://doi.org/10.1016/j.jct.2024.107272
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Published Date

2024

Language

English

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Faculty

Applied Sciences

Department

RST/Radiation, Science and Technology

Research Group

RST/Reactor Physics and Nuclear Materials

Abstract

The present study describes the thermodynamic assessment of three pseudo-binary systems relevant to CsI solubility in molten iodide salts: KI-CsI, NaI-CsI, and NaF-CsI. The motivation for this study was to corroborate a single previously reported data set of the NaI-CsI system, resolve inconsistencies reported by two different data-sets of the KI-CsI system, and generate new experimental data on the NaF-CsI system. Equilibrium data for all systems were obtained using Differential Scanning Calorimetry. Thermodynamic treatments of the three pseudo-binary systems were revised using the CALPHAD method with the thermodynamic software FactSage and Thermochimica. Both experimental and computational investigations provide increased confidence in the thermochemical behaviour of CsI in Molten Salt Reactor nuclear systems.