Abstracts

multi-barrier Deep Geologic Repository (DGR) in a suitable crystalline or sedimentary
bedrock formation at a nominal depth of 400 to 700 m. As part of APM, a technical
program is directed by the NWMO to advance the understanding of fractured crystalline
and sedimentary groundwater systems as they related to assessing site-specific suitability
for implementation of the DGR concept and, ultimately, the passive safety of a selected
site on timescales of 1 Ma (NWMO 2015). The Geoscience program is multi-disciplinary
with a focus on geology, geochronology, structural geology, seismicity, hydrogeochemistry,
isotope hydrology, physical hydrogeology, numerical groundwater system analysis, reactive
transport simulation, sorption, microbiology, paleohydrogeology, geomechanics and glaciation.
A motivation for the work is the characterisation of deep-seated aquitard/aquiclude
systems typified by low permeability (