Evolution of the uranium chemical state in mixed-valence oxides
A fundamental question concerning the chemical state of uranium in the binary oxides UO2,
U4O9, U3O7, U3O8, and UO3 is addressed. By utilizing high energy resolution fluorescence …
U4O9, U3O7, U3O8, and UO3 is addressed. By utilizing high energy resolution fluorescence …
Cation interdiffusion in uranium–plutonium mixed oxide fuels: Where are we now?
R Vauchy, S Hirooka, T Matsumoto… - Frontiers in Nuclear …, 2022 - frontiersin.org
The diffusion phenomena in uranium–plutonium mixed oxides U1− yPuyO2 dictate the
physicochemical properties of mixed oxides (MOX) nuclear fuel throughout manufacturing …
physicochemical properties of mixed oxides (MOX) nuclear fuel throughout manufacturing …
The defect chemistry of UO2±x from atomistic simulations
Control of the defect chemistry in UO 2±x is important for manipulating nuclear fuel
properties and fuel performance. For example, the uranium vacancy concentration is critical …
properties and fuel performance. For example, the uranium vacancy concentration is critical …
Oxidation and anion lattice defect signatures of hypostoichiometric lanthanide-doped UO2
A series of sintered UO 2 pellets doped with lanthanide (Ce, Nd, Yb) elements were
investigated using powder X-ray diffraction, Raman spectroscopy, thermogravimetric …
investigated using powder X-ray diffraction, Raman spectroscopy, thermogravimetric …
Defect accumulation in swift heavy ion-irradiated CeO 2 and ThO 2
Neutron total scattering was used to investigate defect accumulation mechanisms in CeO2
and ThO2 irradiated with 2.2 GeV Au ions. Pair distribution function (PDF) analysis was …
and ThO2 irradiated with 2.2 GeV Au ions. Pair distribution function (PDF) analysis was …
Density functional theory investigation of the layered uranium oxides U 3 O 8 and U 2 O 5
Oxidation of UO2 in the nuclear fuel cycle leads to formation of the layered uranium oxides.
Here we present DFT simulations of U2O5 and U3O8 using the PBE+ U functional to …
Here we present DFT simulations of U2O5 and U3O8 using the PBE+ U functional to …
Low-Temperature Oxidation of Fine UO2 Powders: A Process of Nanosized Domain Development
G Leinders, J Pakarinen, R Delville… - Inorganic …, 2016 - ACS Publications
The nanostructure and phase evolution in low-temperature oxidized (40–250° C), fine UO2
powders (< 200 nm) have been investigated by X-ray diffraction (XRD) and high-resolution …
powders (< 200 nm) have been investigated by X-ray diffraction (XRD) and high-resolution …
Controlling low temperature sintering of UO2+ x
UO 2 nuclear fuel pellets are typically sintered at temperatures of approximately 1700° C to
achieve the high densities and large grain sizes necessary for safe reactor operation …
achieve the high densities and large grain sizes necessary for safe reactor operation …
Differences in the Existence States of Hydrogen in UO2 and PuO2 from DFT + U Calculations
B Ao, R Qiu, H Lu, P Chen - The Journal of Physical Chemistry C, 2016 - ACS Publications
First-principles DFT+ U methods are performed to calculate the formation energy and to
determine the relative stability of hydrogen at the different sites of UO2 and PuO2. Twenty …
determine the relative stability of hydrogen at the different sites of UO2 and PuO2. Twenty …
First-principles study of elastic and thermodynamic properties of UO2, γ-UO3 and α-U3O8
Z Huang, L Ma, J Zhang, Q Zhou, L Yang… - Journal of Nuclear …, 2022 - Elsevier
A detailed solid-state density functional theory study of uranium dioxide (UO 2), gamma
uranium trioxide (γ-UO 3), and alpha triuranium octoxide (α-U 3 O 8), which are very …
uranium trioxide (γ-UO 3), and alpha triuranium octoxide (α-U 3 O 8), which are very …