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Radionuclide Migration into Natural Fracture Surfaces of Granitic Rock

Published online by Cambridge University Press:  21 February 2011

B. Torstenfelt ,
T. Eliasson ,
B. Allard ,
K. Andersson ,
S. Hoglund ,
T. Ittner  and
U. Olofsson
B. Torstenfelt
Affiliation:
Department of Nuclear Chemistry, Chalmers University of Technology, S–412 96 Göteborg, Sweden.
T. Eliasson
Affiliation:
Department of Nuclear Chemistry, Chalmers University of Technology, S–412 96 Göteborg, Sweden.
B. Allard
Affiliation:
Department of Nuclear Chemistry, Chalmers University of Technology, S–412 96 Göteborg, Sweden.
K. Andersson
Affiliation:
Department of Nuclear Chemistry, Chalmers University of Technology, S–412 96 Göteborg, Sweden.
S. Hoglund
Affiliation:
Department of Nuclear Chemistry, Chalmers University of Technology, S–412 96 Göteborg, Sweden.
T. Ittner
Affiliation:
Department of Nuclear Chemistry, Chalmers University of Technology, S–412 96 Göteborg, Sweden.
U. Olofsson
Affiliation:
Department of Nuclear Chemistry, Chalmers University of Technology, S–412 96 Göteborg, Sweden.
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Abstract

The uptake of cesium on natural fracture surfaces taken from granitic bedrock has been studied as well as the depth penetration into the underlying rock. The fracture minerals usually exhibit good sorptive properties with respect to cesium (with the exception of calcite). The surface coatings do not act as physical diffusion barriers and do not prevent a migration into the underlying rock. A considerable depth penetration into the rock (several mm over a period of three months) was observed. The dominating pathways into the rock matrix were the high-capacity minerals in grains or in microfissures. The calculated diffusivity in the rock matrix was of the order of 10−13 m2/s.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 15: Symposium D – Scientific Basis for Nuclear Waste Management VI , 1982 , 339
Copyright
Copyright © Materials Research Society 1983

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References

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