Study of the formation of UO2-PuO2 solid solution by means of UO2-CeO2 simulate

Dörr, Wolfgang; Hellmann, S.; Mages, G.

doi:10.1016/0022-3115(86)90190-x

Cited by 35 publications

(8 citation statements)

References 4 publications

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“…Elastic and mechanical property data obtained in this study are in general agreement with available literature. As reported in Table , the shear modulus of CeO 2 has been previously reported as 60 and 73 GPa, while in this work 79 and 86 GPa were determined through RUS and sound velocity, respectively. A different trend is observed in the bulk modulus data; literature studies report 204‐236 GPa, while RUS produced 185 GPa.…”

Section: Discussionmentioning

confidence: 81%

Thermal and mechanical properties of CeO₂

Suzuki

Kato

Sunaoshi³

et al. 2018

J Am Ceram Soc

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The thermal and mechanical properties of cerium dioxide (CeO2) were assessed using a range of experimental techniques. The oxygen potential of CeO2 was measured by the thermogravimetric technique, and a numerical fit for the oxygen potential of CeO2 is derived based on defect chemistry. Mechanical properties of CeO2 were obtained using sound velocity measurement, resonant ultrasound spectroscopy and nanoindentation. The obtained mechanical properties of CeO2 are then used to evaluate the Debye temperature and Grüneisen constant. The heat capacity and thermal conductivity of CeO2 were also calculated using the Debye temperature and the Grüneisen constant. Finally, the thermal conductivity was calculated based upon laser flash analysis measurements performed on pellets fabricated using a range of feedstock purities to resolve discrepancies in the existing literature.

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Section: Discussionmentioning

confidence: 81%

Thermal and mechanical properties of CeO₂

Suzuki

Kato

Sunaoshi³

et al. 2018

J Am Ceram Soc

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“…The data reported in the literature [17][18][19][20] shows a big discrepancy among them by the influence of experimental factors. But it is generally accepted that both (U, Pu)O 2 and (U, Ce)O 2 have a similar behaviour in diffusion-controlled thermal processes [6,19]. The oxygen/metal ratio Fig.…”

Section: Fabrication Characteristics Of Ce-mox and Pu-moxmentioning

confidence: 98%

“…UO 2 + CeO 2 mixed oxide forms a cubic fluorite-type (U, Ce)O 2 solid solution during a sintering at a high temperature. Both the thermal processes and material properties of this solid solution are similar to those of (U, Pu)O 2 [4][5][6][7][8][9]. For the research studies on the removal of gallium from weapons-grade plutonium, cerium oxide also has been used as a surrogate for plutonium oxide because of the similarities in their thermodynamic properties [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Applicability of CeO2 as a surrogate for PuO2 in a MOX fuel development

Kim

Joung

Lee

et al. 2008

Journal of Nuclear Materials

116

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“…The oxygen non-stoichiometry exhibited by this oxide owing to the multiple valence states of cerium renders it suitable for gas sensing [1,5]. Studies on this oxide are of interest to the nuclear industry for cerium oxide could serve as a surrogate for PuO 2 owing to its chemical similarity to the latter [6,7]. Further it is one of the important fission products that are found in significant quantities in the irradiated nuclear fuel.…”

Section: Introductionmentioning

confidence: 99%

Gel-Combustion Synthesis of Nanocrystalline Cerium Oxide and Its Powder Characteristics

Sundaravel

Kumar

Ananthasivan

2015

Trans Indian Inst Met

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Nanocrystalline ceria powders were prepared by using citrate gel combustion. The influence of the composition of the combustion mixture on the characteristics of the final product was investigated. Ceria powders obtained by calcining the combustion residue in air at 1073 K were characterized for their specific surface area (SSA), X-ray crystallite size (XCS), bulk density (BD), particle size distribution (PSD) and residual carbon. The dependence of these properties on the fuel to oxidant ratio (R) of the initial mixture was investigated. The microstructure of the calcined ceria powders prepared from a mixture with R = 0.25 was investigated by using high resolution transmission electron microscopy. All the calcined powders were pelletised and sintered at 1473, 1673 and 1873 K, and their sinterability was compared by measuring the density of the sintered pellets. A maximum sintered density of 98 % theoretical density could be achieved at a temperature as low as 1473 K for the first time for the powder prepared from a mixture with R = 0.75. The systematic dependence of the properties of these powders on the composition of the initial mixture is being reported for the first time. Powders obtained from a mixture with an R value 0.25 showed a linear increase in sintered densities with the sintering temperature. Other powders exhibited anomalous decrease in the sintered density at high temperature, probably due to irregular grain growth coarsening.

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Study of the formation of UO2-PuO2 solid solution by means of UO2-CeO2 simulate

Cited by 35 publications

References 4 publications

Thermal and mechanical properties of CeO₂

Thermal and mechanical properties of CeO₂

Applicability of CeO2 as a surrogate for PuO2 in a MOX fuel development

Gel-Combustion Synthesis of Nanocrystalline Cerium Oxide and Its Powder Characteristics

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Study of the formation of UO2-PuO2 solid solution by means of UO2-CeO2 simulate

Cited by 35 publications

References 4 publications

Thermal and mechanical properties of CeO2

Thermal and mechanical properties of CeO2

Applicability of CeO2 as a surrogate for PuO2 in a MOX fuel development

Gel-Combustion Synthesis of Nanocrystalline Cerium Oxide and Its Powder Characteristics

Contact Info

Product

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Thermal and mechanical properties of CeO₂

Thermal and mechanical properties of CeO₂