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Hygroscopic Water Uptake and Dry/Wet Cycling Compared with Normal Water Exposure of Cemented Waste Forms

Published online by Cambridge University Press:  26 February 2011

K. Brodersen
K. Brodersen*
Affiliation:
Risø National Laboratory, DK-4000 Roskilde, Denmark.
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Abstract

Considerable water uptake, formation of free liquid and leaching of activity may take place if cemented waste materials containing soluble salts are exposed to high humidity air. Another feature of importance for the structural stability of some materials is cyclic variations between water saturation and dry-out periods. The phenomena have been investigated on a laboratory scale using simulated waste in the form of cemented sodium nitrate or ion-exchange resins. Spherical samples are found to be valuable for simultaneous determination of the leaching of major components, mainly sodium, and the water uptake and swelling obtained from weight-increase measurements for the samples weighed in air and immersed in water.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 127: Symposium BERLIN – Scientific Basis for Nuclear Waste Management XII , 1988 , 455
Copyright
Copyright © Materials Research Society 1989

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References

REFERENCES

1. Brodersen, K., Nilsson, K., Risø contributions under Contract FI 1W-0089-DK to: Characterization of Radioactive Waste Forms. Joint Annual Progress Report 1986 For Task 3 under the CEC Research Programme (1985–1989) on “Management and Disposal of Radioactive Waste”. EUR 11354 (1988) and the succeeding annual report 1987 (under editing).Google Scholar
2. Crank, J., The Mathematics of Diffusion 2nd ed. (Clarendon Press, Oxford, 1975), p. 89.Google Scholar