Curing time effect on the fraction of {sup 137}Cs from cement-ion exchange resins-bentonite clay composition

Conference · Sun Jul 01 04:00:00 EDT 2007

OSTI ID:21156264

Plecas, Ilija; Dimovic, Slavko ^[1]

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1. Vinca Institute of Nuclear Sciences, P.O.BOX 522, 11001 Belgrade (Serbia)

To assess the safety of disposal of radioactive waste material in cement, curing conditions and time of leaching radionuclides {sup 137}Cs have been studied. Leaching tests in cement-ion exchange resins-bentonite matrix, were carried out in accordance with a method recommended by IAEA. Curing conditions and curing time prior to commencing the leaching test are critically important in leach studies since the extent of hydration of the cement materials determines how much hydration product develops and whether it is available to block the pore network, thereby reducing leaching. Incremental leaching rates R{sub n}(cm/d) of {sup 137}Cs from cement ion exchange resins-bentonite matrix after 180 days were measured. The results presented in this paper are examples of results obtained in a 20-year concrete testing project which will influence the design of the engineer trenches system for future central Serbian radioactive waste storing center. (authors)

• Research Organization: American Society of Mechanical Engineers (ASME), Three Park Avenue, New York, NY 10016-5990 (United States); Technological Institute of the Royal Flemish Society of Engineers (TI-K VIV), Het Ingenieurshuis, Desguinlei 214, 2018 Antwerp (Belgium); Belgian Nuclear Society (BNS) - ASBL-VZW, c/o SCK-CEN, Avenue Hermann Debrouxlaan, 40 - B-1160 Brussels (Belgium)
• OSTI ID: 21156264
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
BENTONITE
CEMENTS
CESIUM 137
CONCRETES
CURING
ENGINEERS
HYDRATION
ION EXCHANGE
LEACHING
RADIOACTIVE WASTE MANAGEMENT
RADIOACTIVE WASTES
RESINS