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Long-term field and laboratory leaching tests of cemented radioactive wastes

Ojovan, M.I., Varlackova, G.A., Golubeva, Z.I. and Burlaka, O.N. (2011) Long-term field and laboratory leaching tests of cemented radioactive wastes. Journal of Hazardous Materials, 187 (1-3). pp. 296-302. ISSN 0304-3894

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Abstract

Experiments with real and simulated radioactive cementitious wasteforms were set up to compare the leaching behaviour of cementitious wasteforms containing nuclear power plant operational waste in field and laboratory test conditions. Experiments revealed that the average annual Cs-137 leach rate in deionised water was about thirty-five times greater compared with the measured average value for the 1st year of the field test. Cumulative leached fraction of Cs-137 for 1st year (3.74%) was close to values reported in literature for similar laboratory experiments in deionised water, however more than two orders of magnitude higher than the 1st year leached fraction of Cs-137 in the repository test (0.01%). Therefore, to compare field and laboratory test results, a scaling factor is required in order to account for surface to volume factor difference, multiplied by a temperature factor and a leach rate decrease coefficient related to the ground water composition. (C) 2011 Elsevier B.V. All rights reserved.

Item Type: Article
Copyright, Publisher and Additional Information: © 2011 Elsevier. This is an author produced version of a paper subsequently published in Journal of Hazardous Waste. Uploaded in accordance with the publisher's self-archiving policy.
Keywords: Waste immobilisation; Cement; Leaching; Field tests; Laboratory tests; Long-term performance
Academic Units: The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield)
Depositing User: Miss Anthea Tucker
Date Deposited: 15 Apr 2011 08:53
Last Modified: 08 Feb 2013 17:31
Published Version: http://dx.doi.org/10.1016/j.jhazmat.2011.01.004
Status: Published
Publisher: Elsevier
Refereed: Yes
Identification Number: 10.1016/j.jhazmat.2011.01.004
URI: http://eprints.whiterose.ac.uk/id/eprint/42945

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