Title: Thermodynamic assessment of the LiF-NiF2, NaF-NiF2 and KF-NiF2 systems
Authors: OCADIZ-FLORES JAEN ALONSOCAPELLI ELISARAISON PHILIPPEKONINGS RUDYSMITH ANNA
Citation: JOURNAL OF CHEMICAL THERMODYNAMICS vol. 121 p. 17-26
Publisher: ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Publication Year: 2018
JRC N°: JRC107680
ISSN: 0021-9614
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC107680
DOI: 10.1016/j.jct.2018.01.023
Type: Articles in periodicals and books
Abstract: Using the modified quasi-chemical model in the quadruplet approximation, three new thermodynamic assessments of binary systems useful for the detailed operational design of the Molten Salt Reactor are presented: AF-NiF2 (A = Li, Na, K). These systems are particularly relevant for the study of the molten salt-structural materials interaction, as the salt containment is made of a Ni-based alloy. Using powder X-ray Diffraction (XRD) and Differential Scanning Calorimetry (DSC), new experimental data were gathered for two of these systems, LiF-NiF2 and KF-NiF2, and compared to previous experimental assessments. Our data have confirmed the formation of a F solid solution. The three thermodynamic models show a very good agreement with the experimental data. The melting point of NiF2 was measured for the first time to be T = (1629 ± 5) K, and the thermal expansion coefficient for Li2NiF4 was found to be in the temperature range T = (298–773) K.
JRC Directorate:Nuclear Safety and Security

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