SCK•CEN R&D on the interaction between nuclear waste glass and clay near- and far-field materials

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A large R&D programme has been performed to evaluate the chemical durability of candidate high-level waste glasses in clay environments considered in Belgium. This paper discusses the methodology followed and the main results obtained over the past years. The methodology involves laboratory test set-ups focusing on the interaction with solid clay, modelling, and tests in the underground research laboratory in clay. The results discussed include dissolution rates, mobile radionuclide concentrations in the interacting solutions, analytical modelling and results from an in situ test. The results show that HLW glass will act as a substantial barrier in such an environment. The paper also discusses the main dissolution processes involved and the remaining uncertainties.


Original languageEnglish
Title of host publicationEnvironmental Issues and Waste Management Technologies in the Materials and Nuclear Industries XII: Ceramic Transactions, Vol 207
Place of PublicationHoboken (NJ), United States
Publication statusPublished - Aug 2009
EventMS&T'08. Materials Science & Technology 2008 Conference & Exhibition - The American Ceramic Society, Pittsburgh, PA, United States
Duration: 5 Oct 20089 Oct 2008


ConferenceMS&T'08. Materials Science & Technology 2008 Conference & Exhibition
Country/TerritoryUnited States
CityPittsburgh, PA


  • high-level waste glass, clay, dissolution processes, Si behaviour, experimental methodology, corrosion, long-term dissolution

ID: 203307