Experimental investigation and thermodynamic modelling of the ThF4-PuF3 phase diagram
A. Tosolin (Joint Research Centre (JRC), Politecnico di Milano)
Jean François Vigier (Joint Research Centre (JRC))
S. Mastromarino (TU Delft - RST/Reactor Physics and Nuclear Materials, Joint Research Centre (JRC))
R. J.M. Konings (Joint Research Centre (JRC))
Lelio Luzzi (Politecnico di Milano)
O. Beneš (Joint Research Centre (JRC))
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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.
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