Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 32579
The Long-Term Leaching Behaviour of 137Cs, 60Co and 152Eu Radionuclides Incorporated in Mortar Matrices Made from Natural Aggregates and Recycled Aggregates

Authors: R. Deju, M. Mincu, D. Gurau


During the interim storage or final disposal of low level waste, migration/diffusion of radionuclides can occur when the waste comes in contact with water. The long-term leaching behaviour into surrounding fluid (demineralized water) of 137Cs, 60Co and 152Eu radionuclides, artificially incorporated in mortar matrices made from natural aggregates (river sand) and recycled radioactive concrete was studied. Results presented in this work are obtained in two years of mortar testing and will be used for the safety increasing in the storage of low level radioactive waste. The study involved the influence of curing time, type and size distribution of the aggregates on leaching behaviour. The mortar samples were immersed in distilled water for 30 days. The leached activity of the mortar samples was measured on samples from the immersing water and analyzed through a gamma-ray spectrometry method using an HPGe detector with a GESPECOR code for efficiency evaluation. The long-term leaching behaviour of the radionuclides was evaluated from the leaching data calculating the apparent diffusion coefficient.

Keywords: Leaching behaviour, recycling of radioactive concrete, waste management, gamma-ray spectrometry.

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 884


[1] M. Dragusin, V. Copaciu, V. Popa, C. Dragolici, I. Iorga, R. Deju, C. 0Mustata, C. Tuca, I. Mincu “Plan de Dezafectare al Reactorului Nuclear de Cercetare VVR-S (Decommissioning Plan of the VVR-S Research Reactor)”, project ROM 04 029/2003, applicable revision.
[2] IAEA Safety Standards Series, Classification of Radioactive Waste, General Safety Guide GSG-1, Vienna, 2009, pp 5-6.
[3] Order 156/2005 of CNCAN – NDR-03 (Radioactive waste clasification norms)
[4] R. Deju, D. Gurau, L. Done, C. Mazilu, I. Robu, “The study of radionuclides leaching from mortar made with natural aggregates and recycled aggregates arising from decommissioning of VVR-S RN”, Romanian Reports in Physics 68(4), In Press, 2016.
[5] R. Deju, M. Dragusin, I. Robu, C. Mazilu, C. Tuca, “Review on radioactive concrete recycling methods”, Romanian Reports in Physics 65(4), 2013, pp. 1485-1504.
[6] R. Deju, I. Robu, M. Dragusin, C. Mazilu, C. Tuca, “Selection tests for recycled radioactive sand obtaining method”, Romanian Reports in Physics 67(2), 2015, pp. 673-692.
[7] R. Deju, I. Robu, M. Dragusin, C. Mazilu, C. Tuca, “Tests regarding filling performance of the mortars obtained by radioactive recycled sand”, Romanian Report in Physics 67(3), 2015, pp. 1159-1175.
[8] D. Radu, D. Stanga, O. Sima, “Transfer of detector efficiency calibration from a point source to other geometries using ETNA software”, Romanian Reports in Physics 62(1), 2010, pp. 57-64.
[9] K. Anderson, B. Torstenfelt, B. Allard, “Sorption and diffusion studies of Cs and I in concrete”, Technical Report, Chalmers University of Technology, Goteborg, Sweden, 1981.
[10] F.P. Glasser, A.A. Rahman, R.W. Crawford, C.E. McCulloch, M.J. Angus, “Immobilization and Leaching Mechanisms of Radwaste in Cement-based Matrices”, CEC/DOE Report, DOE/RW/82.050, 919820 1982.
[11] C.E. McCulloch, M.J. Angus, R.W. Crawford, A.A. Rahman, F.P. Glasser, “Cements in Radioactive Waste Disposal: Some Mineralogic Considerations”, Mineralogical Magazine 49, 1985, pp. 211-221.
[12] H.A. Friedman, A.D. Kelmers, “Investigation of Leaching of Radionuclides and Hazardous Materials from Low Level Wastes at Oak Ridge National Laboratory”, ORNL/TM-9883 Report, 1987.
[13] R.O. Abbel Rahman, A.A. Zaki, A.M. El-Kamash, Modeling the long-term leaching behaviour of 137Cs, 60Co, 152,154Eu radionuclides from cement-clay matrices, Journal of Hazardous Materials 145, 2007, pp. 372-380.