Spark plasma and flash sintering process characteristics together with their corresponding
sintering and densification mechanisms and field effects were briefly reviewed. The …

In this work, we quantify the impact of grain boundary (GB) and surface diffusion on fission
gas bubble evolution and fission gas release in UO 2 nuclear fuel using simulations with a …

Uranium dioxide (UO2), the primary fuel for commercial nuclear reactors, incorporates
excess oxygen forming a series of hyperstoichiometric oxides. Thin layers of these oxides …

Dense nanocrystalline and microcrystalline UO 2 samples with controlled grain structure
and stoichiometry were prepared by high energy ball milling and spark plasma sintering …

We report the structural properties of ultra-small ThO2 and UO2 nanoparticles (NPs), which
were synthesized without strong binding surface ligands by employing a covalent organic …

The thermal conductivity of UO 2 fuel needs to be high enough to dissipate the heat
generated from the fission reaction. Since grain size affects thermal conductivity and grain …

Large-grained UO2 is considered a potential accident-tolerant fuel (ATF) due to its superior
fission gas retention capabilities. Irradiation experiments for cerium dioxide (CeO2), used as …

Nanoparticle growth during laser remelting was studied to provide references for optimizing
technological parameters. The variations of nanoparticle sizes during laser remelting …

The purpose of this work is to develop a mechanistic model of grain growth in UO 2 fuel
during reactor operation. The model development builds on published experimental data on …

Advanced microstructure investigations of the high-burnup structure (HBS) in UO 2
produced by high-dose 84 MeV Xe ion irradiation are reported. Spark plasma sintered micro …