J. Phys. IV France 107 (2003) 147
Uranium and its decay products in samples contaminated with uranium mine and mill wasteL. Benedik, H. Klemencic, U. Repinc and P. Vrecek
Department of Environmental Sciences, Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
The routine determination of the activity concentrations of uranium isotopes ( 238U, 235U and 234U), thorium isotopes ( 212Th, 230TI, and 228Th), 231Pa, 226Ra, 210Pb and 210Po in the environment is one of the most important tasks in uranium mining areas. Natural radionuclides contribute negligibly to the extemal radiation dose, but in the case of ingestion or inhalation can represent a very serious hazard. The objective of this study was to determine the activities of uranium and its decay products 230Th, 231Pa, 226Ra, 210Pb and 210Po in sediments and water below sources of contamination (uranium mine, disposal sites and individual inflows) using gamma and alpha spectrometry, beta counting, the liquid scintillation technique and radiochemical neutron activation analysis.
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