Characteristic of pollution with groundwater inflow 90Sr natural waters and terrestrial ecosystems near a radioactive waste storage

The studies were conducted in the territory contaminated by 90Sr with groundwater inflow as a result of leakage from the near-surface trench-type radioactive waste storage. The vertical soil 90Sr distribution up to the depth of 2-3 m is analyzed. The area of radioactive contamination to be calculated with a value which exceeds the minimum significant activity 1 kBq/kg for the tested soil layers: the contaminated area for the 0-5 cm soil layer amounted to 1800 ± 85 m2, for the 5-10 cm soil layer amounted to 300 ± 12 m2, for the 10-15 cm soil layer amounted to 180 ± 10 m2. It is found that 90Sr accumulation proceeds in a natural sorption geochemical barrier of the marshy terrace near flood plain. The exposure doses for terrestrial mollusks Bradybaena fruticum are presented. The excess 90Sr interference level was registered both in the ground and surface water during winter and summer low-water periods and autumn heavy rains.