Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7963111 | Journal of Nuclear Materials | 2018 | 6 Pages |
Abstract
U3Si2 is presently receiving consideration as a high density light water reactor fuel. A reliable knowledge of the formation enthalpy of U3Si2 not only helps study the thermal stability but also facilitate the modeling efforts by serving as a benchmark parameter for thermodynamic calculations of phase equilibria at high temperatures. Previous high temperature thermal analysis on U3Si2 laid the basis for us to conduct two types of high-temperature drop calorimetric measurements to determine its enthalpy of formation: oxide-melt drop-solution calorimetry and transposed temperature drop calorimetry, from which the results obtained are consistent. The determined standard enthalpy of formation of U3Si2 per mole atom, â33.2â¯Â±â¯3.1â¯kJ/molâ
at.%, is in good agreement with previously reported values obtained by other techniques. Our drop calorimetry methods will be used for thermodynamic studies of other U-Si compounds whose enthalpies of formation are not available.
Related Topics
Physical Sciences and Engineering
Energy
Nuclear Energy and Engineering
Authors
Xiaofeng Guo, Joshua T. White, Andrew T. Nelson, Artaches Migdisov, Robert Roback, Hongwu Xu,