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Migration Experiments at the Grimsel Test Site, Switzerland

by Jost Eikenberg, Paul Scherrer Inst, Villigen, Switzerland,
E. Hoehn, Paul Scherrer Inst, Villigen, Switzerland,
Urs Frick, Paul Scherrer Inst, Villigen, Switzerland,



Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1991

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 | Waste sites | Field tests | Sorption | Radioactive wastes | Laboratory tests | Waste management

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