Gas-Permeable Seal Test - Aims

As a consequence of Nagra’s main RD&D issues in connection with the EGTS, the main aims of the Gas-Permeable Seals Test (GAST) are:

  • The demonstration of the effective functioning of gas permeable seals at realistic scale and with realistic boundary conditions (‘proof of concept’)
  • The validation and, if necessary, improvement of current conceptual models for the re saturation and gas invasion processes into S/B seals
  • The determination of up-scaled gas / water permeabilities of S/B seals (i.e. two-phase flow parameters for large-scale models)

Secondary objectives (and by-product of the experiment) include or may include:

  • The evaluation of in-situ emplacement techniques and the necessary QA measures to be applied
  • The development of non-destructive monitoring systems (wireless or remote) and in particular tomographic survey methods (seismics, radar)

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

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.