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Monitoring the plutonium depletion in dissolution residues of a spent fuel solution using a surrogate and plutonium isotope ratio measurements

Abstract : 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.
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https://hal-cea.archives-ouvertes.fr/cea-02932076
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Submitted on : Monday, September 7, 2020 - 2:57:36 PM
Last modification on : Friday, March 5, 2021 - 1:04:01 PM

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Alexandre Quemet, Emilie Buravand, Brigitte Catanese, Patrick Huot, Vincent Dalier, et al.. Monitoring the plutonium depletion in dissolution residues of a spent fuel solution using a surrogate and plutonium isotope ratio measurements. Journal of Radioanalytical and Nuclear Chemistry, Springer Verlag, 2020, https://doi.org/10.1007/s10967-020-07311-5. ⟨10.1007/s10967-020-07311-5⟩. ⟨cea-02932076⟩

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