Tritium in the Water System of the Pyshma River Floodplain

The paper presents data on the concentration of tritium in the water of the river Pyshma, which is under the influence of the Beloyarsk NPP named after Kurchatov, and drinking water of settlements located in the coastal zone of the river. It was found that the content of radionuclide in the water of the river at a distance of up to 400 km below the dam of the Beloyarsk reservoir varies within 13–26 Bq/l and significantly decreases along the course of the river. In the coastal part of the river, above-background tritium pollution enters the drinking water of wells and chinks. It is shown that in water samples from wells, the tritium concentration significantly decreases with increasing depth and distance from the dam of the Beloyarsk reservoir; in the water of private wells, such a relationship was not reliably recorded. The concentration levels of tritium in the spring water of 7 settlements located along the Pyshma river at different distances from the dam of the Beloyarsk re-servoir, almost 2 times higher than in the water of deep chinks, have similar values and do not depend on the distance.