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Ceramization of Inorganic Ion Exchangers Loaded with Nuclear-Waste into Red Clay Tiles

Published online by Cambridge University Press:  21 February 2011

Jukka Lehto ,
Olli J. Heinonen  and
Jorma K. Miettinen
Jukka Lehto
Affiliation:
Technical Research Centre of Finland, Reactor Laboratory, Otakaari 3 A, 02150 Espoo 15, Finland
Olli J. Heinonen
Affiliation:
Technical Research Centre of Finland, Reactor Laboratory, Otakaari 3 A, 02150 Espoo 15, Finland
Jorma K. Miettinen
Affiliation:
University of Helsinki, Department of Radiochemistry, Unioninkatu 35, 00170 Helsinki 17, Finland
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Abstract

A new method to ceramize inorganic ion exchangers loaded with nuclear waste has been developed. It is simpler and cheaper than methods used previously, e.g. hot pressing. The inorganic ion exchangers, sodium titanate and ZrO2, were turned into final ceramic waste form by mixing them with a Finnish red clay in weight ratio 1:4 at maximum. The tiles moulded frKm the wet, bakeable mixture were ceramized at 1020–1060°C. The leach rates of Sr, Cs and Co from the tiles determind by a 7 dynam c ISO-test were after six months of leaching 10−6−10−7 g/cm2/d, in decreasing order. Mechanically the tiles are very durable: flexural strengths were in the range of 20–45 meganewtons per square meter.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 15: Symposium D – Scientific Basis for Nuclear Waste Management VI , 1982 , 589
Copyright
Copyright © Materials Research Society 1983

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References

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