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Transport and Retention Within the Fracturing Network of an Indurated Argillaceous Formation (Tournemire Site, France)

Published online by Cambridge University Press:  10 February 2011

L. De Windt ,
J. Cabrera  and
J.-Y. Boisson
L. De Windt
Affiliation:
Institut de Protection et de Sûireté Nucléaire, DPRE/SERGD, 60-68 Av. G. Leclerc BP 6, 92 265 Fontenay-aux-Roses Cedex, France
J. Cabrera
Affiliation:
Institut de Protection et de Sûireté Nucléaire, DPRE/SERGD, 60-68 Av. G. Leclerc BP 6, 92 265 Fontenay-aux-Roses Cedex, France
J.-Y. Boisson
Affiliation:
Institut de Protection et de Sûireté Nucléaire, DPRE/SERGD, 60-68 Av. G. Leclerc BP 6, 92 265 Fontenay-aux-Roses Cedex, France
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Abstract

The characteristics of indurated argillaceous formations, considered as potential host media for high level radioactive waste disposal, differ in many aspects from plastic clays or crystalline rocks. In order to develop generic research on the containment properties of such formations, the French Institute for Protection and Nuclear Safety (IPSN) selected the Tournemire site ]1]: a sub-horizontal claystone layer (250 m thick, argilites and marls from Toarcian and Domerian formations) located between two limestone aquifers. Water circulations seem to be of very minor importance in the claystones, with a main diffusive component for transport ]1]. However, since a few weak water inflows occur in fracturing networks induced by tectonics, one of the key issues in the site characterisation is to adequately identify the water flows and the related transport and retention features within these specific water-conducting features. It is the purpose of the authors to present some insights in such a complex topic, using informations acquired in the framework of the Tournemire Project.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 506: Symposium – Scientific Basis for Nuclear Waste Management XXI , 1997 , 1023
Copyright
Copyright © Materials Research Society 1998

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References

REFERENCES

[1] Barbreau, A. and Boisson, J.-Y., EC Report, EUR 15736FR (1993).Google Scholar
[2] Windt, L. De, Cabrera, J. and Boisson, J.-Y., «( Radioactive waste containment in indurated claystones: comparison between the chemical containment properties of matrix and fractures » Geological Society of London (Special Publication on Chemical Containment of Waste in the Geosphere), accepted for publication.Google Scholar
[3] Mathieu, R., Pagel, M., Clauer, N., Windt, L. De, Cabrera, J. and Boisson, J.-Y., « Paleofluid circulations records in shales: a mineralogical and geochemical study of calcite veins from the experimental Tournemire tunnel site (France) », submitted to Eur. J. Miner.Google Scholar
[4] Moreau, Y. and Michelot, J.-L., pers. comm.Google Scholar