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Durability tests on plasma treated surrogate cemented concentrates and resins

Published online by Cambridge University Press:  26 December 2019

Eduardo Ferreira Open the ORCID record for Eduardo Ferreira [Opens in a new window] ,
Katrien Hendrix ,
Nele Bleyen ,
Elie Valcke ,
Erik Coppens ,
Katrien Meert  and
Seif Ben Hadj Hassine
Eduardo Ferreira*
Affiliation:
SCK•CEN, Belgian Nuclear Research Centre, Boeretang 200, 2400, Mol, Belgium
Katrien Hendrix
Affiliation:
SCK•CEN, Belgian Nuclear Research Centre, Boeretang 200, 2400, Mol, Belgium
Nele Bleyen
Affiliation:
SCK•CEN, Belgian Nuclear Research Centre, Boeretang 200, 2400, Mol, Belgium
Elie Valcke
Affiliation:
SCK•CEN, Belgian Nuclear Research Centre, Boeretang 200, 2400, Mol, Belgium
Erik Coppens
Affiliation:
ONDRAF/NIRAS, The Belgian National Agency for the management of Radioactive Waste and enriched Fissile Materials, Kunstlaan 14, 1210 Brussels, Belgium
Katrien Meert
Affiliation:
ONDRAF/NIRAS, The Belgian National Agency for the management of Radioactive Waste and enriched Fissile Materials, Kunstlaan 14, 1210 Brussels, Belgium
Seif Ben Hadj Hassine
Affiliation:
ONDRAF/NIRAS, The Belgian National Agency for the management of Radioactive Waste and enriched Fissile Materials, Kunstlaan 14, 1210 Brussels, Belgium
*
*correspondent author: [email protected]
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Abstract

Plasma incineration might be a promising technique for the conditioning of various radioactive waste streams. Assessing the long-term durability of the plasma slag is essential to predict its performance during long-term disposal. In this paper, the stability of six plasma treated surrogate cemented concentrates or resins in a high pH environment is investigated. The slags were crushed (2 different granulometries) and immobilized in a cement matrix, after which samples were submitted to long-term durability tests (stability under water at 20 °C; stability in a high relative humidity environment at 38 °C) and to an accelerated Alkali-Silica-Reaction (ASR) test (1 M NaOH at 80 °C). The first results show that the expansion and strength loss of the cement-slag mixtures remain limited in the test conditions, although differences between the different materials and granulometries could be perceived. No visual damage was observed. Some tests are still ongoing and will last 2 years.

Keywords

strengthchemical compositionmicrostructurenuclear materialswaste management
Type
Articles
Information
MRS Advances , Volume 5 , Issue 3-4: Scientific Basis for Nuclear Waste Management XLIII , 2020 , pp. 149 - 158
Copyright
Copyright © Materials Research Society 2019

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References

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