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Abstract

Ion exchange materials used at nuclear power plants can be immobilised in cements or polymer matrices. Polymers are preferred to cements from the final product point of view, but from an economic point of view the reverse is true. Solidification of ion exchange resins exhibits problems of swelling and cracking. The maximum of dried resin which can be included in a cement matrix, to give satisfactory characteristics, is about 10% by weight. The objective of this study was to select the types of cement that produce the best quality on immobilisation of three kind of resins, and to set up cement formulations containing the maximum possible loading of resin, which maintain the final product specifications proposed for this sort of conditioned waste in Spain. The final selection of cement was based on studies of leach rate, made at a constant temperature of 40 C. The conclusion of the study shows that blast furnace slag is the best cement for the immobilisation of ion exchange resin in both bead and powdered form, with regard to mechanical strength, stability and leaching characteristics.

Additional information

Authors: DE LA HUEBRA A G, CIEMAT, Madrid (ES);MURILLO R, CIEMAT, Madrid (ES);ORTIZ S J, CIEMAT, Madrid (ES)
Bibliographic Reference: EUR 13053 ES (1990) 143 pp., FS, ECU 12.50
Availability: (2)
ISBN: ISBN 92-826-1720-2
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