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Journal of Porous Media

ISSN for PRINT: 1091-028X

Institutional price:	$713.00
Issues per year:	8

Best Paper Award Selection - Editorial Board Site

2006, Volume9

102 pages

Issue price - $155.00

Immobilization of ¹³⁷Cs and ⁶⁰Co in Concrete Matrix

Ilija Plecas
VINCA Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Serbia and Montenegro

Slavko Dimovic
VINCA Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Serbia and Montenegro

ABSTRACT

To assess the safety for disposal of radioactive waste-cement composition, the leaching of ¹³⁷Cs and ⁶⁰Co, from a waste composite into a surrounding fluid has been studied. Leaching tests were carried out in accordance with a method recommended by IAEA. Determination of retardation factors K_F and coefficients of distribution k_d, using a simplified mathematical model for analyzing the migration of radionuclides, has been developed. In our experiment, we have analyzed mechanism of ¹³⁷Cs and ⁶⁰Co leaching values during a period of 60 days. Results presented in this paper are examples of results obtained in a 25 yr mortar and concrete testing project, which will influence the design of the engineered trenches system for a future central Serbian radioactive waste storage center.