In a preliminary study, in vivo skull measurements and in vitro urine measurements of 210Pb and nulU have been performed to find out the individual, chronic exposure to waterborne natural radionuclides of a small group of Finnish people. For their domestic water, the studied individuals use water from drilled wells containing elevated concentrations of natural uranium and its daughter nuclides ((234,235,238)U, 222Rn, (226,228)Ra, 210Po, 210Pb). Enhanced 210Pb and 235U activities were observed in several people. A positive correlation is observed between the U concentration in urine (microg d(-1)) and the number of counts (cpm) in the gamma ray energy peaks originating from the decay of 235U and 234Th respectively. Calibration of the detector set-up and the determination of background sources are in progress.
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- The study investigates uranium (U/U) ratios in environmental samples from the Pamir region to evaluate the influence of human nuclear activity on this remote area.
- The U/U ratios found (ranging from 0.007256 to 0.007263) suggest a slight enrichment of uranium, indicating the presence of anthropogenic materials, particularly in cryoconite compared to soil and water.
- The findings also suggest that while the area shows subtle enrichment of uranium, it remains relatively clean from local contamination, with environmental uranium largely resulting from historical global nuclear fallout rather than local sources.
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