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
CountryUnited States
CityBoston
Period29/11/993/12/99

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