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Welcome to the Grimsel Test Site (GTS) Website

The Grimsel Test Site (GTS) located in the Swiss Alps was established in 1984 as a centre for underground Research and Development (R&D) supporting a wide range of research projects on the geological disposal of radioactive waste. GTS provides an environment which is analogous to that of a repository site so allowing the development and testing of equipment, methodology and models under fully realistic conditions. International partners from Europe, Asia and North America are working together at this unique facility.

Grimsel's Role in Underground Research & Development

GTS is a research facility and not a potential repository site; although investigations may utilise a wide range of radioactive tracers, no radioactive waste will be disposed of at the GTS.

Grimsel Partners from around the world


Events related to the GTS

18 and 19 May 2015 : MaCoTe Meeting, Switzerland

5th-6th June 2015 : LCS Meeting, London

10th-11th June 2015 : ISCO Meeting, Switzerland

14th-16th October 2015 : LTD Meeting, Finland

ISCO Meeting - June, 2014

ISCO Meeting 2012

ISCO 2014 Annual Meeting of International Steering Committee Members and GTS partners in Thun, Switzerland to bring participants up to date with onging experiments and to discuss the future directions of the GTS (click for larger image)

30th Anniversary of the GTS

30th Anniversary
GTS : 30th Anniversary
To celebrate the 30th Anniversary of the GTS, a new "Underground Research - World Wide" exhibition will be presented for the first time to the general public during the “Visitors Day” at the GTS (organised for the 28th of June this year).

Welcoming Speech : Dr. Piet Zuidema, Head of Science & Technology

Welcoming Speech : Dr. Ingo Blechschmidt, Head of Grimsel Test Site

About the GTS

Grimsel 2010 - English (PDF 1,119 kb )

Grimsel 2010Deutsch  (PDF 989 kb )

Video Documentation

GTS CFM PackerColloid Formation and Migration Video
A short video showing the tunnel packer installation.
HLW OverviewHLW Repository Overview
A sequence of 3D Animations illustrating a proposed deep geological HLW repository.
GMT OverviewGMT Overview
A short sequence of videos documenting the early stages of the GMT Project.

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.