Migration Experiments at the Grimsel Test Site, Switzerlandby Jost Eikenberg, Paul Scherrer Inst, Villigen, Switzerland,
E. Hoehn, Paul Scherrer Inst, Villigen, Switzerland,
Urs Frick, Paul Scherrer Inst, Villigen, Switzerland,
Abstract: The Grimsel Migration Experiment is a multidisciplinary study aimed at testing models of solute transport in fractured media, determining the degree to which laboratory results could be extrapolated to field conditions and developing the methodology for characterisation of potential repository sites. This report reviews briefly the present status of field tracer experiments and presents novel results involving conservative tracers (Na-fluoresceine, 82Br and 4He). On-line determination of 4He was achieved by the use of commercial He leak detector and development of a vacuum dialysis technique. In addition, from the results of a hydrogeochemical equilibration test important sorption characteristics of the migration fracture could be deduced.
Subject Headings: Probe instruments | Field tests | Model analysis | Model tests | Hydrologic models | Cracking | Leakage | Switzerland | Europe
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