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Diffusion in the Matrix of Granitic Rock Field Test in the Stripa Mine Part 2.

Published online by Cambridge University Press:  25 February 2011

Lars Birgersson  and
Ivars Neretnieks
Lars Birgersson
Affiliation:
Department of Chemical EngineeringRoyal Institute of TechnologyS-100 44 Stockholm, Sweden
Ivars Neretnieks
Affiliation:
Department of Chemical EngineeringRoyal Institute of TechnologyS-100 44 Stockholm, Sweden
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Abstract

A migration experiment in the rock matrix is presented. The experiment has been carried out in “undisturbed” rock, that is in rock under its natural stress environment. Since the experiment was performed at the 360 m-level (in the Stripa mine), the rock was subject to nearly the same conditions as the rock surrounding a nuclear waste repository as proposed in the Swedish concept (KBS).

The results show that all three tracers (Cr-EDTA, Uranine and 1-) have passed the zone disturbed by the presence of the injection hole and migrated some distance into “undisturbed” rock.

These results indicate the existence of a connected micro fissure system in undisturbed rock, in which tracers (and therefore radionuclides) can migrate. Diffusivities obtained in this experiment are comparable to those obtained in laboratory experiments.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 26: Symposium D – Scientific Basis for Nuclear Waste Management VII , 1983 , 247
Copyright
Copyright © Materials Research Society 1984

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References

REFERENCES

1. Neretnieks, I., Diffusion in the Rock Matrix: An important Factor in Radionuclide Retardation? J. Geophys. Res., 1980, 85, p. 4379.Google Scholar
2 Stephansson, O., Personal Communication, Division of Rock Mechanics, University of Luleå, Sweden, 1981.Google Scholar
3. Wilson, C., Macropermeability Experiment in Stripa (draft report), Earth Science Div., Lawrence Berkeley Laboratory, California, 1981.Google Scholar
4. Edwards, A.L., TRUMP: A Computer Program for Transient and Steady-State Temperature Distributions in Multidimensional Systems, National Bureau of Standards, Springfield Va., 1972.Google Scholar
5. Birgersson, L., Neretnieks, I., Diffusion in the matrix of granitic rock. Field test in the Stripa mine. Scientific Basis for Nuclear Waste Management, Vol 5, Elsevier, New York, 1982.Google Scholar
6. Skagius, K., Neretnieks, I., Diffusion measurements in crystalline rocks. SKBF/KBS Technical Report, 1983.Google Scholar