Hyperalkaline Plume in Fractured Rock (HPF) - Laboratory Programme

A laboratory programme is being carried out at the University of Bern, Japan Nuclear Cycle Development Institute (JNC - now JAEA) and the Paul Scherrer Institute (PSI) to examine the development of a hyperalkaline plume under controlled laboratory conditions.

These experiments aim to examine production of secondary phase minerals on the rock samples under GTS-simulated conditions. Secondary minerals such as tobermorite can form in the samples after dissolution of the primary minerals (e.g. quartz and K-feldspar) in the original sample. The laboratory work can be split into three main areas:

  1. Rock core infiltration experiments (Uni Bern)
  2. Rock alteration experiment and resin injection experiments (JNC).
  3. Radiochemical lab programs of sorption and solubility in high pH solutions (PSI).


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.