Gas-Permeable Seal Test - Quality Assurance

Quality assurance was one of the crucial components of the Gas Permeable Seal Test (Gast) at the Grimsel test site because targets for pre-defined material properties had to be met for the density of the emplaced material. Different QA methods were applied and assessed during the constructon process because it will be crucial during the construction of a repository to ensure the material properties of the plug are consistent with the specifications. (photos Comet)

Gast experiment, Grimsel : quality assurance
Weighing of big bags for mass balance

Gast experiment, Grimsel : quality assurance
Levelling of S/B surface after each layer

Gast experiment, Grimsel : quality assurance
Levelling of S/B surface after each layer

Gast experiment, Grimsel : quality assurance
3D scan every 4-5 layers (40-50cm)

Gast experiment, Grimsel : quality assurance
S/B density measurement with ring cutter

Gast experiment, Grimsel : quality assurance
S/B density profiles with Troxler (neutron) probe

Gast experiment, Grimsel : quality assurance
S/B density measurement with ring cutter

Gas-Permeable Seal Test (GAST)

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.