Thermodynamic study of LiF-BeF2-ZrF4-UF4 system

In this work the three binary phase diagrams LiF-ZrF4, BeF2-ZrF4 and UF4-ZrF4 were thermodynamically assessed. The three ternary phase diagrams LiF-BeF2-ZrF4, BeF2-ZrF4-UF4 and LiF-ZrF4-UF4 were approximated on the basis of binary data. A pseudo-ternary LiF-BeF2-ZrF4 system with constant amount of UF4 set to 0.83 mol% was calculated as well, typical for molten salt reactor fuel. Based on this diagram a suggestion for the composition of the fuel in this system was made.