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Bedrock Characterisation of Four Candidate Repository Sites in Finland As Determined by He-Gas Methods

Published online by Cambridge University Press:  10 February 2011

J. Hartikainen ,
K. Hartikainen ,
J. Timonen  and
A. Hautojärvi
J. Hartikainen
Affiliation:
Oy Helium Gas Research HGR Ltd, Kekkolantie 25 A, FIN-40520 Jyväskylä, FINLAND, harka@ horus.co.jyu.fi
K. Hartikainen
Affiliation:
Oy Helium Gas Research HGR Ltd, Kekkolantie 25 A, FIN-40520 Jyväskylä, FINLAND, harka@ horus.co.jyu.fi
J. Timonen
Affiliation:
University of Jyväskylä, Department of Physics, P.O. Box 35, FIN-40351 Jyvädskylä, FINLAND, [email protected]
A. Hautojärvi
Affiliation:
Posiva Oy, Mikonkatu 15 A, FIN-00100 Helsinki, FINLAND, [email protected]
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Abstract

At the end of the year 2000, one of four sites will be chosen as the final repository site in Finland. Therefore accurate and comprehensive statistics of the bedrock characteristics such as porosity [% ] and effective diffusion coefficient [m2/s ] of these sites are of importance. Altogether 115 rock samples from the four sites were measured by different He-gas methods to achieve this goal.

The results obtained indicate that the average bedrock properties at these sites are quite similar. Variations among individual samples and different rock types within one repository site were larger than variations among the averaged values of the four sites. Some indication of increased microfracturing was also found in samples of small size.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 556: Symposium QQ – Scientific Basis for Nuclear Waste Management XXII , 1999 , 775
Copyright
Copyright © Materials Research Society 1999

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References

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