A closed near-surface radioactive waste repository is the source of various radionuclides causing the human exposure. Recent investigations confirm an effectiveness of the engineering barriers installed in 2006 to prevent the penetration of radionuclides to the environment. The tritium activity concentration in groundwater decreased from tens of kBq/l to below hundreds of Bq/l. The monitoring and groundwater level data suggest the leaching of tritium from previously contaminated layers of unsaturated zone by rising groundwater while 210Pb may disperse as a decay product of 226Ra daughters.
1. Gudelis, A., Nedveckaitė, T., Prokopčiuk, N., Filistovič, V., Remeikis, V., & Motiejūnas, S. (2010). Assessment of radionuclide migration and radiological human exposure at the closed near-surface radioactive waste repository. Nukleonika, 55(2), 251-259.
3. Gudelis, A., Juodis, L., Konstantinova, M., Remeikis, V., Baltrūnas, D., & Butkus, D. (2006). Results of tritium monitoring in the environment of the Maišiagala radioactive waste repository. In LSC 2005, Advances in Liquid Scintillation Spectrometry (vol. 1, pp. 331-341). Katowice, Poland.
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