Influence of model selection, constitutive behavior assignment and parametric sensitivity on tunnel, cavern and pillar EDZ assessment for a long-term deep geological repository
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Date
2014
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Conference Paper
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yes
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Abstract
A proposed Deep Geologic Repository (DGR) for Low and Intermediate Level Radioactive Waste beneath the Bruce nuclear site, near Kincardine, Ontario, is currently under-going an Environmental Assessment. The site is underlain by an 840 m thick near-horizontally bedded Paleozoic sedimentary sequence. Within this sequence the DGR has been positioned within a massive, laterally extensive, low permeability Ordovician argillaceous limestone formation at a depth of 680 m. Several hundred metres of massive shales overlie the repository and will act as a vertical cap, although two shafts must penetrate this shale enroute to the repository horizon. In support of mechanical analysis and other studies, an extensive program of investigation was undertaken to obtain material properties for the various layers to be encountered and to provide boundary conditions for analysis. Analysis of long-term stability has been carried out for the shaft, the main storage caverns and intervening pillars over a time frame up to one million years as influenced by glaciation, gas and pore pressure evolution, seismic disturbance and long term strength degradation. © 2014 Taylor & Francis Group, London.
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published
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Book title
Rock Engineering and Rock Mechanics: Structures in and on Rock Masses
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Pages / Article No.
1249 - 1254
Publisher
CRC Press
Event
2014 ISRM European Rock Mechanics Symposium (EUROCK 2014)
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03465 - Löw, Simon (emeritus) / Löw, Simon (emeritus)