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Sorption of Some Fission Products and Actinides in Concrete Systems

Published online by Cambridge University Press:  28 February 2011

S. Höglund ,
L. Eliasson ,
B. Allard ,
K. Andersson  and
B. Torstenfelt
S. Höglund
Affiliation:
Department of Nuclear Chemistry, Chalmers University of Technology, S-412 96 Göteborg, Sweden
L. Eliasson
Affiliation:
Department of Nuclear Chemistry, Chalmers University of Technology, S-412 96 Göteborg, Sweden
B. Allard
Affiliation:
Department of Water in Environment and Society, Linköping University, S-581 83 Linköping, Sweden
K. Andersson
Affiliation:
Studsvik Energiteknik AB, S-611 82 Nyköping, Sweden
B. Torstenfelt
Affiliation:
Department of Nuclear Chemistry, Chalmers University of Technology, S-412 96 Göteborg, Sweden
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Abstract

The sorption of some actinides (Th, U, Np, Pu and Am) and fission products (I, Cs) was measured on two types of Standard Portland cements as well as on samples from old (70 years) hydro power dam constructions using a batch technique. Pore water compositions were analysed, and artificial pore water solutions were used as aqueous phases in the experiments. Measurements were also performed on five other concrete types (not reported in detail in this paper) to illustrate the effects of the cement matrix composition on the sorption behaviour of the radionuclides.

The sorption of actinides in the trivalent (americium), tetravalent (thorium) pentavalent (neptunium) and hexavalent (uranium) states was high in all the studied concrete systems.

Generally, the sorption of cesium was low due to the low exchange capacity of the cement and the high concentration of competing cations in the pore waters.

The sorption of iodine was much higher than in most silicate minerals of geologic origin.

The differences between the various concrete systems were generally minor in terms of their sorbing capacities.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 50: Symposium STOCKHOLM – Scientific Basis for Nuclear Waste Management IX , 1985 , 683
Copyright
Copyright © Materials Research Society 1985

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References

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