Back to Search
Start Over
A multiple-code simulation study of the long-term EDZ evolution of geological nuclear waste repositories
- Source :
- Environmental Geology. 57:1313-1324
- Publication Year :
- 2008
- Publisher :
- Springer Science and Business Media LLC, 2008.
-
Abstract
- This simulation study shows how widely different model approaches can be adapted to model the evolution of the excavation disturbed zone (EDZ) around a heated nuclear waste emplacement drift in fractured rock. The study includes modeling of coupled thermal-hydrological-mechanical (THM) processes, with simplified consideration of chemical coupling in terms of time-dependent strength degradation or subcritical crack growth. The different model approaches applied in this study include boundary element, finite element, finite difference, particle mechanics, and elasto-plastic cellular automata methods. The simulation results indicate that thermally induced differential stresses near the top of the emplacement drift may cause progressive failure and permeability changes during the first 100 years (i.e., after emplacement and drift closure). Moreover, the results indicate that time-dependent mechanical changes may play only a small role during the first 100 years of increasing temperature and thermal stress, whereas such time-dependency is insignificant after peak temperature, because of decreasing thermal stress.
- Subjects :
- Engineering
Fissure
business.industry
General Engineering
Finite difference
Fracture mechanics
Finite element method
Stress (mechanics)
Permeability (earth sciences)
medicine.anatomical_structure
Earth and Planetary Sciences (miscellaneous)
medicine
General Earth and Planetary Sciences
Environmental Chemistry
Geotechnical engineering
business
Boundary element method
General Environmental Science
Water Science and Technology
Waste disposal
Subjects
Details
- ISSN :
- 14320495 and 09430105
- Volume :
- 57
- Database :
- OpenAIRE
- Journal :
- Environmental Geology
- Accession number :
- edsair.doi...........678114c30a81b7b01728b1c513e64a68