Modelling the Thermal Impact of a Repository for High-Level Radioactive Waste in a Clay Host Formation

X. Sillen
Belgian Nuclear Research Centre (SCK-CEN), Waste & Disposal Department, Mol, Belgium

Disposal in deep clay geological formations is one of the promising options for disposal of high-level radioactive waste. Yet, they can generate considerable amounts of heat as a side effect of radioactive decay.

This paper shows how COMSOL Multiphysics has been used to evaluate the physical impacts of the heating on the geological media around a deep disposal system.

The software was found to be well suited to the simulation of the relevant processes at the large time and spatial scales that are common to geological disposal system studies.