Material Transport in the Temperature Gradient of Fast Reactor Fuels

Review of high temperature thermochemical properties and application in phase-field modelling of incipient melting in defective fuel

“…A careful analysis must be made of the experimental data due to the overlapping phenomena of evaporation/condensation. For the current analysis, the results of Schumacher et al [51,52] for the heat of transport as a function of uranium valence is combined with the valence model of Lassman [53], which gives for UO 2+x :…”

Highlights of experimental thermodynamics in the field of nuclear fuel development

“…This phenomenon was investigated and explained years ago by Schumacher et al [10]. As the analytical techniques of the oxygen analysis in micro-areas were recently improved we have directly measured the radial oxygen concentration profile of short-time irradiated U 0.8 Pu 0.2 O 1.95 .…”

“…The oxygen concentration gradient is controlled by the oxygen vacancy flux in direction to higher temperatures. The profile can quantify the heat of transport Q Ã v of oxygen vacancies using the transport equation [10]. It is presented as a function of the relative fuel radius in Fig.…”

Computer simulations of non-congruent melting of hyperstoichiometric uranium dioxide

“…Therefore, as a simplification, the Dufour term can be neglected. This system may be simplified through the heat of transport, Q * defined as [20]:…”