Community Research and Development Information Service - CORDIS


TIMODAZ - Thermal Impact on the Damaged Zone Around a Radioactive Waste Disposal in Clay Host Rocks, Executive Summary of the activities (Mid Term)

Project ID: 36449


Spent nuclear fuel and long-lived radioactive-waste management is an important environmental issue today. Disposal in deep clay geological formations is one of the promising options to dispose of these wastes. An important item for the long-term safety of underground disposal is the assessment of the damaged zone extent induced both by the excavation process and the thermal impact.
The TIMODAZ project studies the Thermo-Hydro-Mechanical and Chemical (THMC) processes occurring around a repository. It focuses on the study of the combined effect of the EDZ and the thermal impact on the repository host rock. The influence of the temperature increase on the EDZ evolution as well as the possible additional damage created by the thermal load is investigated. The knowledge gained within the TIMODAZ project will allow to assess the significance of the TDZ (Thermal Damaged Zone) in the safety case for disposal in clay host rock and to provide direct feedback to repository design teams.
Three types of clay are investigated: the Boom Clay, the reference Belgian host formation, the Opalinus Clay, that of Switzerland and, the Callovo-Oxfordian argilitte (COX), the host formation of France.

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Record Number: 9709 / Last updated on: 2009-01-05
Category: PROJ