Uranium dioxide

Iodine defect energies and equilibria in ${\\text{ZrO}_2}$

Incorporation energies and defect equilibria in monoclinic, tetragonal and cubic phases of ${\\text{ZrO}_2}$ are predicted, using density functional theory calculations, for iodine dopant concentrations between ${10^{-5}}$ and ${10^{-3}}$ atoms per …

A new method for the characterization of temperature dependent thermo-physical properties

The proposed method is based on the laser flash technique. Radially distributed thermograms are calculated via a finite element model and used in an inverse method by optimizing either specific heat or thermal conductivity of a material. These …

Measurement and interpretation of the thermo-physical properties of UO$_2$ at high temperatures: The viral effect of oxygen defects

Values are reported of specific heat, thermal conductivity and thermal diffusivity of UO2from 1500 K to 2900 K based on laser flash measurements. Experiment is complemented by the development of solid state physics models that aid in the …

Modelling explicit fracture of nuclear fuel pellets using peridynamics

Three dimensional models of explicit cracking of nuclear fuel pellets for a variety of power ratings have been explored with peridynamics, a non-local, mesh free, fracture mechanics method. These models were implemented in the explicitly integrated …