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Radial flow permeability testing of an argillaceous limestone
1Civil Engineering and Applied Mechanics, McGill University, Montrea, QC, Canada. patrick.selvadurai@mcgill.ca
Ground Water
|April 12, 2012
Summary
Researchers measured the permeability of argillaceous Lindsay limestone, a key factor for nuclear waste storage in Ontario. Permeability tests using radial flow methods determined the rock
Area of Science:
- Geology
- Hydrogeology
- Nuclear Waste Management
Background:
- The Lindsay limestone formation in Ontario is designated for deep geological repository construction for low to intermediate level nuclear waste.
- Understanding the permeability of this argillaceous limestone is critical for predicting radionuclide migration within the geosphere.
Purpose of the Study:
- To determine the permeability of the argillaceous Lindsay limestone using laboratory tests.
- To assess the influence of permeability on long-term radionuclide transport from a nuclear waste repository.
Main Methods:
- Employed both steady-state and transient radial flow laboratory tests.
- Utilized analytical solutions and computational models for interpreting radial flow problems.
- Compared experimental results with existing literature data for similar formations.
Main Results:
- Permeability values for Lindsay limestone ranged from 1.0 × 10(-22) to 1.68 × 10(-19) m(2).
- Results were obtained for radial flows along bedding planes under zero axial stress.
- Factors influencing transient pulse tests and their interpretation were discussed.
Conclusions:
- The study provides crucial permeability data for the Lindsay limestone, essential for nuclear waste repository safety assessments.
- The findings contribute to understanding groundwater flow and contaminant transport in argillaceous rock formations.
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