Thermal conductivity and thermal diffusivity of solid UO/sub 2/

Abstract

New equations for the thermal conductivity of solid UOg were derived based upon a nonlinear least squares fit of the data available in the literature. In the development of these equations, consideracion was given to their thermodynamic consistency with heat capacity and density and theoretical consistency with enthalpy and heat capacity. Consistent with our previous treatment of enthalpy and heat capacity, 2670 K was selected as the temperature of a phase transition. A nonlinear equation, whose terms represent contributions due to phonons and electrons, was selected for the temperature region below 2670 K. Above 2670 K, the data were fit by a linear equation.