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Estimation of the Migration Parameters for the Boom Clay Formation by Percolation Experiments on Undisturbed Clay Cores

Published online by Cambridge University Press:  28 February 2011

Martin J. Put ,
Marcel Monsecour ,
Alfons Fonteyne  and
Hidekazu Yoshida
Martin J. Put
Affiliation:
SCK/CEN, Boeretang 200, 2400 Mol, Belgium
Marcel Monsecour
Affiliation:
SCK/CEN, Boeretang 200, 2400 Mol, Belgium
Alfons Fonteyne
Affiliation:
SCK/CEN, Boeretang 200, 2400 Mol, Belgium
Hidekazu Yoshida
Affiliation:
PNC, 9-13 1-Chome, Akasaka, Minato-ku, Tokyo, Japan
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Abstract

The safety assessment of the repository for high level radioactive waste in the Boom clay formation requires reliable data for the migration parameters. The experimental set-up and the interpretation method is briefly described for percolation experiments on undisturbed clay cores drilled from the formation and results are reported. The undisturbed clay cores are drilled perpendicular and parallel to the stratification of the formation to study the isotropy of the formation. To represent the real situation as close as possible, in-situ interstitial clay pore water is used as percolating liquid.

Parameter values determined in the percolation experiments are presented for bromine, iodine and tritiated water. Darcy velocity and effective stress are used as variables. Anisotropy of the formation is demonstrated for the hydraulic conductivity, but is found to be trivial for the dispersion parameters. A general relation between the apparent dispersion constant, the diffusion accessible porosity and the Darcy velocity is also given.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 212: Symposium P – Scientific Basis for Nuclear Waste Management XIV , 1990 , 823
Copyright
Copyright © Materials Research Society 1991

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References

REFERENCES

1. Put, M., Radioactive Waste Management and the Nuclear Fuel Cycle. Vol. 6, No. 3–4 (1985), pp. 361–390.Google Scholar
2. Put, M. and Henrion, P., Radiochimica Acta 44/45, 343–347 (1988).Google Scholar
3. Henrion, P. and Put, M., presented at MIGRATION 89, Monterey, CA, November 1989 (unpublished).Google Scholar