Calorimetric measurements on uranium–plutonium mixed oxides

Oxygen potential and thermal conductivity of (U,Pu) mixed oxides

“…Thermal conductivity values for these oxide fuels were obtained as a product of thermal diffusivity, heat capacity and density. Heat capacity values required for the computation of thermal conductivity were obtained from the measurements carried out in our laboratory [15]. The density of all the [4] 1273 K, y = 0.25, Woodley [4] 1373 K, y = 0.25, Woodley [4] Oxygen potential (kJ/mol) O/M ratio pellets is about 96% TD.…”

The Development of Models to Optimize Selection of Nuclear Fuels through Atomic-Level Simulation

“…To prove this assumption for solid solutions with plutonium oxide content higher than 25at. %, Kandan et al 62 recently measured the enthalpy increments of U 1-y Pu y O 2 solid solutions with y = 0.21, 0.28 and 0.4 using a high-temperature differential calorimeter in the temperature range 1000-1780 K. From these data, the heat capacity, entropy and the Gibbs energy functions were derived. It was concluded that the enthalpies of (U, Pu)O 2 solid solutions in fact obey the Neumann-Kopp molar-additivity rule.…”

Materials science research for sodium cooled fast reactors

“…A 37 pin fuel sub-assembly containing mixed oxide fuels with 29% PuO 2 is undergoing test irradiation in FBTR and has attained a burn-up of 84 Gwd/t burnup. Thermophysical properties of the oxide fuels have been experimentally measured (Kandan et al 2004).…”