Potential natural changes and implications for a UK GDF

Shaw, R.P.; Auton, C.A.; Baptie, B.; Brocklehurst, S.; Dutton, M.; Evans, D.J.; Field, L.P.; Gregory, S.P.; Henderson, E.; Hughes, A.; Milodowski, A.E.; Parkes, D.; Rees, J.G.; Small, J.; Smith, N.; Tye, A.; West, J.M.. 2012 Potential natural changes and implications for a UK GDF. British Geological Survey, 198pp. (CR/12/127N) (Unpublished)

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A period of one million years following closure has been used by RWMD when considering the post-closure safety case for a geological disposal facility (GDF). It is during this period that evolution of the near-field and local geosphere as a result of GDF construction and operation will be at its most rapid and radioactivity of the emplaced waste will be at their highest levels. Significant effort has been spent internationally on identifying the many natural processes that may affect the evolution of the geosphere over this timescale and the contribution of those processes to GDF performance. The purpose of this report is to identify which processes are relevant to geosphere evolution in this time period around a generic GDF in the UK. Previous work has identified tectonic effects, climate change effects, uplift, subsidence, volcanism and diagenesis as key concerns. The potential impact of each of these processes on a generic UK GDF, constructed according to a multiple barrier concept and sited at a depth of between 200 and 1000 m in a suitable host rock, is outlined in the following sections: tectonic related uplift and subsidence; seismicity, tectonic history and volcanism; climate change and glaciation and weathering and erosion.

Item Type: Publication - Report (UNSPECIFIED)
Programmes: BGS Programmes 2010 > Minerals and waste
Funders/Sponsors: National Nuclear Laboratory
Additional Information. Not used in RCUK Gateway to Research.: This report has been prepared by the British Geological Survey under contract to NDA. The report has been reviewed by NDA and Quintessa on behalf of the NDA, but the views expressed and conclusions drawn are those of the authors and do not necessarily represent those of NDA. This report made open March 2013
Date made live: 26 Mar 2013 16:55 +0 (UTC)

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