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[en] Leaching characteristics of ''1''3''7Cs from immobilized waste matrices in different cement-based grouts have been assessed to investigate the influence of the additives on the leaching behavior of the solid waste matrices. The International Atomic Energy's Agency (IAEA) standard leach method has been employed to study the leach pattern of 137Cs radionuclide from the immobilized waste form. The examination of the leaching data revealed that clay additives reduces the leach rate for the studied radionuclide. The controlling leaching mechanism has been studied and the transport parameters were calculated for all studied waste matrices. Simplified analytical models have been derived to predict the Cumulative Leach Fraction (CLF) of radionuclides over the studied experimental period. These simplified research models could be used as a screening tool to assess the performance of the waste matrix under repository conditions. (author)
Source
International Atomic Energy Agency, Waste Technology Section, Vienna (Austria); [1 CD-ROM]; ISBN 978-92-0-139310-4; 
; ISSN 1011-4289; ; Sep 2013; 14 p; Also available on-line: http://www-pub.iaea.org/MTCD/Publications/PDF/TE-1701_add-CD/PDF/Egypt.pdf; 5figs., 3 tabs., 28 refs.
; ISSN 1011-4289; ; Sep 2013; 14 p; Also available on-line: http://www-pub.iaea.org/MTCD/Publications/PDF/TE-1701_add-CD/PDF/Egypt.pdf; 5figs., 3 tabs., 28 refs.