Experimental investigation and thermodynamic modelling of the ThF&lt;sub&gt;4&lt;/sub&gt;-PuF&lt;sub&gt;3&lt;/sub&gt; phase diagram

Tosolin, A.; Vigier, J. F.; Mastromarino, S.; Konings, R. J.M.; Luzzi, L.; Beneš, O.

doi:10.1016/j.jnucmat.2023.154682

Experimental investigation and thermodynamic modelling of the ThF₄-PuF₃ phase diagram

Title

Experimental investigation and thermodynamic modelling of the ThF₄-PuF₃ phase diagram

Author

Tosolin, A. (Politecnico di Milano; Joint Research Centre (JRC))
Vigier, J. F. (Joint Research Centre (JRC))
Mastromarino, S. (TU Delft RST/Reactor Physics and Nuclear Materials; Joint Research Centre (JRC))
Konings, R. J.M. (Joint Research Centre (JRC))
Luzzi, L. (Politecnico di Milano)
Beneš, O. (Joint Research Centre (JRC))

Date

2023

Abstract

Phase equilibria in the ThF₄-PuF₃ system were measured by differential scanning calorimetry. Samples were encapsulated to prevent leakage during the measurements and to prevent fluoride contamination of the instrument. Formation of intermediate compounds and solid solutions was investigated by X-ray diffraction. A thermodynamic model based on the CALPHAD approach was developed for the measured system. Good fit between measurements and phase equilibria calculated using the model was achieved.

Subject

Actinide fluorides
Calphad
Molten salt reactor
Thermodynamics
ThF-PuF phase diagram

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http://resolver.tudelft.nl/uuid:48bbd0e8-8378-48fd-9b24-f958d9a9aa2c

DOI

https://doi.org/10.1016/j.jnucmat.2023.154682

ISSN

0022-3115

Source

Journal of Nuclear Materials, 587

Part of collection

Institutional Repository