Kyrychenko V. Radioecological threat and additive radiation doses for the population from Pridneprovsky chemical plant tailings

Thesis is an original study of the various factors of radioecological influence from the tailings of Pridneprovsky Chemical Plant, which has been held in the Dniprodzerzhynsk city and its nearby settlements. During the laboratory studies parameters of the migration ability of naturally occurring radioactive materials and metals in tailings were evaluated. Also the radiation dose for the population from the ingestion of naturally occurring radioactive materials was calculated. The evaluation of the content of mobile forms of metals and naturally occurring radioactive materials in the tailings has shown that tailings are the potential sources of the intense and prolonged pollution of groundwater and local rivers. The ingestion of naturally occurring radioactive materials for adult population is: 210Pb – 38.8, 210Ро – 30.6, 226Ra – 47.3, 232Th – 59.7, 238U – 713.4 Bq/year, that is lower, than Norms of Radioactive Safety of Ukraine. The effective dose from the ingestion of naturally occurring radioactive materials is 0.03 mSv/year, which is safe because it is less than levels provided by the Norms of Radioactive Safety of Ukraine (0.12 mSv/year) and the average effective dose in Ukraine – 0.1 mSv/year. The calculation of the predictive contamination levels for the agricultural production and the radiation dose for the population in the conditions of the destruction of the «Sukhachevskoye» tailing showed that the last was unacceptable for agriculture.