Abstract
As an analogue to processes affecting radionuclide migration in a crystalline rock waste repository, the distribution of natural decay series radionuclides and rare earth elements has been examined in two contrasting rock drillcore sections from NAGRA’s underground test laboratory in Grimsel, southern Switzerland. The results indicate that mechanical damage to rocks associated with water-bearing fractures in the crystalline rock repository may subsequently result in sites suitable for the retardation of migrating radionuclides.
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