DECOVALEX 2027

DEvelopment of COupled models and their VALidation against Experiments

Numerical simulation showing the THM process evolution of a real repository scenario (Cigeo) in Callovo-Oxfordian (COx) clay (OGS-HPC simulation by Wenqing Wang)

Project title: 8th phase of the DECOVALEX project (2024-2027)

Project description:

“The DECOVALEX project is an international research and model comparison collaboration, initiated in 1992, for advancing the understanding and modeling of coupled thermo-hydro-mechanical-chemical (THMC) processes in geological systems. Prediction of these coupled effects is an essential part of the performance and safety assessment of geologic disposal systems for radioactive waste and spent nuclear fuel, and also for a range of sub-surface engineering activities. The project has been conducted by research teams supported by a large number of radioactive-waste-management organizations and regulatory authorities. Research teams work collaboratively on selected modeling cases, followed by comparative assessment of model results.”

The OGS team (BGR, TUBAF, UFZ) will participate in 7 tasks. UFZ will lead the SAFENET-2 task dealing with fracture mechanics in crystalline rock.

Tasks of DECOVALEX 2027 and participation matrix (status 12/2023)