THM-Coupled Modeling of Barrier Integrity for HLW Disposal in Bedded Salt - 18289
- IfG - Institut fuer Gebirgsmechanik GmbH, Leipzig (Germany)
- BGR Federal Institute for Geosciences and Natural Resources, Hannover (Germany)
Within the framework of the R and D project KOSINA in Germany, numerical studies analyzing the long-term integrity of a bedded salt barrier under the thermal loading of heat generating radioactive waste have been performed using different modeling approaches for various repository concepts and two geological structures. The THM-coupled calculations show an initially steep increase of temperatures in the vicinity of the HLW canisters which reduces an uplift above the repository. This in turn leads to a temporally and spatially limited reduction of horizontal stresses at the top of the salt, allowing for pressure-driven percolation of groundwater into the upper part of the hydraulic barrier. However, at any given time an undisturbed salt barrier of over 300 m remains, shielding the repository from groundwater inflow. (authors)
- Research Organization:
- WM Symposia, Inc., PO Box 27646, 85285-7646 Tempe, AZ (United States)
- OSTI ID:
- 22975434
- Report Number(s):
- INIS-US--20-WM-18289
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AMBIENT TEMPERATURE
COMPUTERIZED SIMULATION
CONTAINERS
FEDERAL REPUBLIC OF GERMANY
GROUND WATER
HIGH-LEVEL RADIOACTIVE WASTES
HYDRAULICS
NUMERICAL ANALYSIS
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTE STORAGE
SALTS
SHIELDING
UNDERGROUND DISPOSAL
WATER INFLUX