Experimental Study of the Nickel Solubility in Suphidic Groundwater Under Anoxic Conditions

Torbjörn Carlsson, Ulla Vuorinen, Tommi Kekki, Hannu Aalto

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

    Abstract

    Recent literature recognizes a lack of proper chemical data that may be necessary for the calculation of realistic values of the nickel solubility in sulphidic groundwaters. Consequently, in order for the performance assessment of radioactive waste repositories to be conservative, solubility values that clearly exceed those obtained from modelling and experiments have been used to compensate for uncertainty. The safety analysis of decommissioning waste from the Olkiluoto NPP indicates that 59Ni, together with 94Nb, will dominate the dose rates in the waste after about 65 000 years. However, the estimated solubility limit of nickel is uncertain, and more studies are needed.
    This paper presents the results from an experimental study of the nickel solubility in sulphidic groundwater under anoxic conditions. The waters used were natural groundwater from Olkiluoto and synthetic saline water, to which sodium sulphide had been added. Two sulphide concentrations, 0.1 and 3 mg/L, were used.
    Original languageEnglish
    Title of host publicationSymposium QQ – Scientific Basis for Nuclear Waste Management XXIII
    PublisherMaterials Research Society
    Pages287-292
    DOIs
    Publication statusPublished - 1999
    MoE publication typeB3 Non-refereed article in conference proceedings
    Event23rd International Symposium on the Scientific Basis for Nuclear Waste Management: (1999 MRS Fall Meeting) - Boston, United States
    Duration: 29 Nov 19993 Dec 1999

    Publication series

    SeriesMRS Online Proceedings
    Volume608
    ISSN1946-4274

    Conference

    Conference23rd International Symposium on the Scientific Basis for Nuclear Waste Management
    Country/TerritoryUnited States
    CityBoston
    Period29/11/993/12/99

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