Process for preparing a powder comprising a solid solution of uranium dioxide and of a dioxide of at least one other actinide and/or lanthanide element
AssigneesCommissariat à l'énergie atomique et aux éenergies alternatives, Orano Cycle
InventorsGuillaume Peter-Soldani, Stephane Grandjean, Francis Abraham
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Abstract
A method for preparing a powder of a solid solution of dioxide of uranium and of at least one other actinide and/or lanthanide element comprising combusting a solution that comprises uranyl nitrate and at least one nitrate of the other actinide and/or lanthanide element and glycine, with the glycine being used in a predetermined amount so as to form, at the end of the combustion, the solid solution.
Claims6
A method for preparing a powder of a solid solution of dioxide of uranium and of at least one other actinide and/or lanthanide element comprising:
- combusting a solution comprising uranyl nitrate and at least one nitrate of the other actinide and/or lanthanide element and glycine, the glycine being used in a predetermined amount in order to form, at the end of combusting, said solid solution, said predetermined amount being an over-stoichiometric amount of glycine relative to the uranyl nitrate obtained by:
- a) determining a combustion equation of uranyl nitrate, to which a factor φU is assigned to the stoichiometric coefficient of glycine;
- b) determining an over-stoichiometric amount of glycine, QU, by multiplying the amount of uranyl nitrate by the stoichiometric coefficient of glycine and by the factor φU, the latter being set to a value greater than 1;
- c) determining a combustion equation of the nitrate of the other actinide and/or lanthanide element, to which a factor φAn/Ln is assigned to the stoichiometric coefficient of glycine;
- d) determining an amount of the glycine, QAn/Ln, by multiplying the amount of the at least one nitrate of the other actinide and/or lanthanide element by the stoichiometric coefficient of the glycine and by the factor φAn/Ln, the latter being set to a value below 2;
- and
- e) obtaining said predetermined amount by adding at least the amounts of glycine determined in b) (QU) and d) (QAn/Ln), respectively.
Dependencies are inferred from the claim text.