Colloid Formation and Migration - Project Aims

The aims of the CFM project with its laboratory, in-situ and modelling approaches are to:

  • Examine colloid generation rates and mechanisms at the Engineered Barrier System (EBS) – host rock boundary under in-situ conditions
  • Evaluate the long-distance(~10m scale) migration behaviour of EBS-derived colloids in a water-conducting feature in a repository relevant flow system (i.e. with a very low flow rate/water flux)
  • Study the long-term geochemical behaviour (mobility, mineralisation, colloid formation, etc.) of radionuclides at the EBS – host rock boundary
  • Examine the reversibility of radionuclide uptake onto colloids
  • Gain experience in long-term monitoring of radionuclide/colloid propagation near a repository
  • Apply the results to improve repository performance assessments
  • Contribute to the optimisation of EBS design and to the 'monitoring' debate

For more information please contact : Ingo Blechschmidt, This email address is being protected from spambots. You need JavaScript enabled to view it.

Colloid Formation and Migration Experiment

The GTS underground facilities are also available to interested 3rd parties for underground testing and research. The GTS offers cost-effective access to a fully developed, well characterised underground research facility with round the year logistical support - please contact Dr. Ingo Blechschmidt, Head of the Grimsel Test Site, for further details.