Monitoring the plutonium depletion in dissolution residues of a spent fuel solution using a surrogate and plutonium isotope ratio measurements
Résumé
This study presents the development of an innovative experiment using a surrogate, for monitoring the depletion kinetics of plutonium dissolution residues in an irradiated fuel dissolution solution containing a high plutonium concentration. The surrogate, a (U,Pu)O2 compound, was synthesized from a plutonium having an isotopic composition different from the dissolution solution. This helps monitoring the plutonium residue depletion by TIMS measurements of the 240Pu/239Pu isotope ratio. Repeatability better than 83 ppm was achieved for the 240Pu/239Pu ratios in each aliquot of the dissolution profiles allowing qualitative and quantitative interpretation of the kinetic evolution that could not be reached by a conventional direct concentration determination.
Domaines
Chimie analytique
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Publi_Isotope_ratio_vs_dissolution_revision2.docx (226.33 Ko)
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