The geochemical characterisation of the host rock and its pore water is of high priority in the research programme of the CMHM ANDRA Rock Laboratory. Typical topics are: Diffusion of radionuclides, measurements of dissolved gases, production of hydrogen by corrosion, influence of contact with high pH phases (cement), microbiology in pore water or interactions of steel or glass with the geological and artificial barriers in the repository.  

Geochemical experiments

The instrumentation of geochemical experiments in rock laboratories is part of the core competence of Solexperts. Since the foundation of Nagra's Grimsel rock laboratory in 1982, we have specialised in this fascinating field. Today, we have an unparalleled pool of experience in geochemical experiments in granite and low-permeability claystones. ANDRA's 5th consecutive framework contract for the supply and installation of geochemical experimental equipment in the Bure rock laboratory is very motivating for Solexperts and a unique platform to conduct four more years of cutting-edge geochemical research.

Innovation Drilling Robot

Many of the current and planned geochemical investigations take place in the so-called Alvéoles. These microtunnels are up to 150 m long and have a steel liner with a cementation between the liner and the rock. Solexperts developed a drilling robot especially for these Alvéoles to take samples of the steel liner/cementation/rock interface.


Médéric Piedevache

Engineering Geologist ENSG

Member of the extended executive board
Branch manager Nancy, France

T +33 (0) 3 83 94 04 50

vCard   |   QR Code

Yanick Lettry

Geologe / Hydrogeologist CHYN

Hydrogeological instrumentation and tests /
QM hydrogeological Instrumentation / Geochemistry

T +41 (0) 44 806 29 53

vCard   |   QR Code

Thomas Fierz

Civil Engineer ETHZ

Managing director Solexperts AG and branches /
Manager Solexperts France SARL /
Manager Solexperts GmbH

T +41 (0) 44 806 29 29

vCard   |   QR Code

Melvin Parisi

Engineering Geologist ENSG

Project leader

T +33 (0) 6 86 03 56 26

vCard   |   QR Code