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Preparation of moldable powder by spray drying of uranium dioxide obtained by dry process conversion of UF6
Preparation of moldable powder by spray drying of uranium dioxide obtained by dry process conversion of UF6
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机译:通过对六氟化铀进行干法转化制得的二氧化铀进行喷雾干燥,制备可塑粉
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摘要
The invention relates to a process for preparing a castable powder of uranium dioxide UO2, for use in the manufacture of MOX fuel.This process comprises the following stages:1) to prepare an aqueous suspension of a powder of UO2 obtained by dry process from uranium hexafluoride, said suspension comprising 50 to 80% by weight of UO2 and at least one additive chosen among deflocculation agents, organic binders, hydrogen peroxide H2O2 and a powder of U3O8, in such a quantity that the viscosity of the suspension does not exceed 250 mPa.sec, and2) to atomise this suspension and dry it in a hot gas, at a temperature of 150 to 300° C., to obtain a castable powder of UO2 with an average particle size of 20 to 100 mum.
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