Influence of nitric acid and plutonium concentrations in dissolver solution of mixed oxide fuel on decontamination factors for uranyl nitrate hexahydrate crystal

M. Nakahara, K. Nomura, T. Washiya, T. Chikazawa, Izumi Hirasawa

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    In order to examine the decontamination behavior of the Pu and fission products (FPs) that contained with the uranyl nitrate hexahydrate (UNH) crystals in the U crystallization process, experiments were carried out using mixed oxide (MOX) fuel dissolver solution. The experiments confirmed that Eu was adequately decontaminated by washing the UNH crystals with a HNO3 solution. However, Ba crystallized as Ba(NO3)2 and the washing was ineffective for the decontamination of Ba. High HNO3 and Pu concentrations in the mother liquor, the decontamination factor (DF) of Cs was low because Cs precipitated with Pu as Cs2Pu(NO3) 6. The Pu clearly showed a reasonable DF because the amount of Pu in the dissolver solution was higher than that of Cs. Almost all the amount of Pu remains in the mother liquor except the one in the Cs2Pu(NO 3)6 precipitate.

    Original languageEnglish
    Pages (from-to)315-320
    Number of pages6
    JournalRadiochimica Acta
    Volume98
    Issue number6
    DOIs
    Publication statusPublished - 2010 Jun

    Fingerprint

    Uranyl Nitrate
    Mixed oxide fuels
    Plutonium
    Nitric Acid
    decontamination
    Decontamination
    plutonium
    nitric acid
    mixed oxides
    nitrates
    Crystals
    washing
    Washing
    crystals
    fission products
    Fission products
    Crystallization
    Precipitates
    precipitates
    Experiments

    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry

    Cite this

    Influence of nitric acid and plutonium concentrations in dissolver solution of mixed oxide fuel on decontamination factors for uranyl nitrate hexahydrate crystal. / Nakahara, M.; Nomura, K.; Washiya, T.; Chikazawa, T.; Hirasawa, Izumi.

    In: Radiochimica Acta, Vol. 98, No. 6, 06.2010, p. 315-320.

    Research output: Contribution to journalArticle

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    AU - Hirasawa, Izumi

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