Oxygen potential studies on hypostoichiometric uranium-cerium mixed oxide

The thermal conductivity and lattice parameter measurements in a low Ce content (U1−yCey)O2 mixed oxide

“…The calculated lattice parameters from the measured peak data are shown in Fig. 3, and these results were in good agreement with the reference data [10][11][12]. The following equation was obtained for the relationship between the lattice parameter a in nm and the CeO 2 content [Ce] (mol fraction).…”

XPS analysis of UxCe1−xO2±δ and determination of oxygen to metal ratio

“…The pellets were further heated at 1073 K for 4 h under a flowing stream of Ar + 8% H 2 gas equilibrated with water at 298 K to ensure that the O:M ratio of the mixed oxide is maintained at 2.0 [4]. The ratio has also been verified using a solid electrolyte (calcia stabilized zirconia based) cell [11]. Prepared samples were stored in an inert atmosphere glove box and the exposure of the sample to the atmosphere were only during the transport, handling and during XPS measurement.…”

The effects of the physical states of a simulated fission product on the linear thermal expansion of (U0.924Ce0.076)O2

“…3, and the results for (U 0.924 Ce 0.076 )O 2 were in good agreement with the reference data [1][2][3]. The lattice parameter was calculated by using a Nelson-Riley method from the XPRESS TM program (X-ray powder research software).…”

“…Further, cerium oxide has often been used as a simulating material for plutonium oxide. Although cerium oxide cannot duplicate the behaviors of plutonium oxide exactly, it has been used owing to its similar physical/thermodynamic behaviors, and a convenience in handling [1][2][3]. Especially, (U, Ce)O 2 properties data for a low content (below 10 mol%) are required in the relevant research of the MOX fuel for a pressurized water reactor (PWR).…”