Hybrid LES–multizonal modelling of the uranium oxalate precipitation

“…The stirrer bar length (12 mm) was chosen to be about half the diameter of the reactor (25 mm), in order to create two mixing zones, i.e. free and forced vortexes, as described by Bertrand et al 35 .…”

Section: Re a = (2)mentioning

confidence: 99%

Synthesis of size-controlled UO₂ microspheres from the hydrothermal conversion of U(iv) aspartate

et al. 2018

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“…The nucleation kinetics is studied using a stopped flow apparatus patented by the CEA/AREVA shown in Figure 1 [29].…”

Section: Methodsmentioning

confidence: 99%

“…Equation 27is very important sin tion liquid and solid phase composit pr (29) ce it links the relaions at any time of ecipitation reaction. Finally, from Equation 27, the analytical solution of the relative supersaturation is obtained as a function of the composition of the aqueous solution only:…”

Section:  )mentioning

confidence: 99%

Method to Study the Primary Nucleation for Solid Solution: Application to Uranium-Neodymium Oxalate Coprecipitation

Parmentier¹,

Bertrand

Plasari³

et al. 2013

CSTA

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Actinides co-precipitation is currently investigated in order to synthesize solid solutions of actinides mixed oxalates. This paper deals with the thermodynamic and kinetic study of the precipitation of uranium-neodymium oxalate system. Based on an analysis of the theories developed in the literature, a new expression for the determination of the supersaturation ratio for the solid solutions is presented. An experimental study of the nucleation kinetics was performed on the mixed uranium-neodymium oxalates. Homogeneous and heterogeneous primary nucleation laws are obtained using a specific stopped flow apparatus. The experimental results are consistent with the classical behaviour of nucleation phenomena. The values of the kinetic parameters for the solid solution point out that the formation of the uraniumneodymium mixed oxalates is kinetically favoured compared with the simple uranium and neodymium oxalates.

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Hybrid LES–multizonal modelling of the uranium oxalate precipitation

Cited by 27 publications

References 28 publications

Structural study of (N2H5,H)2.9U1.1Ce0.9(C2O4)5·10H2O from a conventional X-ray diffraction diagram obtained on a powder synthesized by a fast vortex process

Structural study of (N2H5,H)2.9U1.1Ce0.9(C2O4)5·10H2O from a conventional X-ray diffraction diagram obtained on a powder synthesized by a fast vortex process

Synthesis of size-controlled UO₂ microspheres from the hydrothermal conversion of U(iv) aspartate

Method to Study the Primary Nucleation for Solid Solution: Application to Uranium-Neodymium Oxalate Coprecipitation

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Hybrid LES–multizonal modelling of the uranium oxalate precipitation

Cited by 27 publications

References 28 publications

Structural study of (N2H5,H)2.9U1.1Ce0.9(C2O4)5·10H2O from a conventional X-ray diffraction diagram obtained on a powder synthesized by a fast vortex process

Structural study of (N2H5,H)2.9U1.1Ce0.9(C2O4)5·10H2O from a conventional X-ray diffraction diagram obtained on a powder synthesized by a fast vortex process

Synthesis of size-controlled UO2 microspheres from the hydrothermal conversion of U(iv) aspartate

Method to Study the Primary Nucleation for Solid Solution: Application to Uranium-Neodymium Oxalate Coprecipitation

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Synthesis of size-controlled UO₂ microspheres from the hydrothermal conversion of U(iv) aspartate