Experiments in underground conditions


The underground research facility HADES (High-Activity Disposal Experimental Site) is the unique instrument available for in-situ research into the potential for disposing of highly radioactive and/or long-lived waste in deep clay layers. The EIG EURIDICE is responsible for the technical and scientific management of the facility.

HADES is mainly used for studying the behaviour of the different components of a disposal system under real conditions. It also allows for technical demonstrations in realistic operational conditions.

Overview of experiments in HADES

The experiments carried out in and around HADES are intended to gather information about the geological, hydro-geological and geotechnical characteristics of the host rock and to study specific processes, such as the interaction between the artificial and natural barriers and the waste, and the migration of radionuclides in clay. This consequently requires a multidisciplinary approach. Most of the experiments are carried out in boreholes. These are drilled from the experimental gallery and vary in diameter and depth. The experiments can be divided into following categories:

  • Construction techniques
  • Clay characterisation
  • Overpack corrosion
  • Radionuclide migration
  • Instrumentation
  • Waste form compatibility
  • Characterisation of engineered barriers systems

More information about the individual experiments and their results is available on the website of the EIG EURIDCE.