TIME PATTERN OF RADIONUCLIDE EMISSIONS AND DISCHARGES INTO THE NATURAL ENVIRONMENT OF THE PIVDENNOUKRAINSKA NPP SURVEILLANCE ZONE. / ДИНАМІКА ВИКИДІВ ТА СКИДІВ РАДІОНУКЛІДІВ У ПРИРОДНЕ СЕРЕДОВИЩЕ ЗОНИ СПОСТЕРЕЖЕННЯ ПІВДЕННОУКРАЇНСЬКОЇ АЕС.

OBJECTIVE: assessment of impact of operation of the Pivdennoukrainska Nuclear Power Plant (PUNPP) on the environment of surveillance zone (SZ) based on parameters of radiation monitoring within 2015-2021 period. METHODS: socio-hygienic (analysis of the radiation monitoring parameters), analytical, statistical. RESULTS: The environmental radiation impact associated with emissions and discharges of radioactive substances originated in the production cycle of the PUNPP in everyday conditions was found as insignificant. The gas-aerosol atmospheric emissions of inert radioactive gases, long-lived nuclides, and 131I did not exceed the established permissible levels (PL) and amounted to a hundredth of a percent of the emission limit (EL) for the inert radioactive gases and long-lived nuclides, and a thousandth of a percent for radioactive iodine. Total atmospheric emissions of the 51Cr, 54Mn, 59Fe, 58Co, 60Co, 90Sr, 95Zr, 95Nb, 134Cs, 137Cs, and 3Н radionuclides by the PUNPP power units (actual and % of EL) did not exceed the established PL. Maximum average values of atmospheric air concentration of 137Cs in SZ forthe 2015-2021 period ranged from 2.858 µBq/m3 (PUNPP industrial site) to 1.986 µBq/m3 (Riabokoneve village, 33.5 km distance), and maximum average values of the 90Sr air concentration were from 1.310 µBq/m3 to 0.566 µBq/m3, respectively. According to radionuclide monitoring no significant change of the quality of surface water occurred upon the PUNPP discharges to the Pivdennyi Bug River. Specific activity of the 137Сs in agricultural products in the PUNPP SZ was insignificant and not exceeding the PL of the content in food products. Content of 137Cs in the samples from the PUNPP SZ did not exceed 1.0 % of the total activity. CONCLUSION: Average concentration of radionuclides in atmospheric air of the settlements in the PUNPP SZ was several orders of magnitude lower than that established by regulatory documents. The PUNPP discharges to the Pivdennyi Bug River, according to radionuclide parameters that are monitored, have not significantly changed the quality of surface water. The content of 90Sr and 137Cs was uniform in all observation radii of distance from the NPP, confirming the very low level of 90Sr and 137Cs environmental emission by the PUNPP. The content of 137Cs in agricultural products within the PUNPP SZ was significantly lower than PL.

ECOLOGICAL DETERMINANTS IN THE FORMATION OF THE POPULATION'S ATTITUDE TO THE DEVELOPMENT OF NUCLEAR ENERGY. / EKOLOGIChNI DETERMINANTY U FORMUVANNI STAVLENNIa NASELENNIa DO ROZVYTKU ATOMNOÏ ENERGETYKY.

OBJECTIVE: Evaluation of the key environmental determinants that shape the response of the social environment tothe activities of nuclear power plants. MATERIALS AND METHODS: The poll was conducted in the observation zone (OZ) of the South-Ukrainian NPP (SUNPP).A repetition-free probabilistic selection was used in the population survey. The sample of respondents from the population of the SUNPP OZ was 322 people with the sampling error of 5.4 % and confidence interval of 95.0%. An ordinal 5-point measurement scale was used to assess the quality of life and anxiety, and nominal measurement scaleswere used for other issues. All the age groups of population from 20 to 65 years were taken into account. The sociohygienic, sociological, statistical and mathematical research methods were applied in the process of work (relativevalues, averages, reliability of paired differences according to Student's t test). RESULTS: The level of perception of radiation risk by the population of the NPP OZ was the lowest among respondentsof satellite cities of Rivne NPP (RNPP) and SUNPP compared to the population of rural settlements and cities of theOZ. Storage and shipment of radioactive waste are the determinant among the factors that form an environmentalthreat to the population of OZ as a result of NPP activities. Social factors that determine the assessment of environmental safety of NPP activities are employment at the NPP, place of residence, gender, age, level of education of thepopulation, etc. The «Ch-image¼ of the ecological catastrophe formed in the population of Ukraine as a result of theChNPP accident , regardless of the place of residence on the territory of Ukraine, influences behavior, formation ofplans and assessments, especially in population living near the ionizing radiation sources. CONCLUSION: The current legislation governing the relationship between functioning NPPs and the communities inwhich they are located needs to be improved, guided by the basic principle of environmental public health - socialjustice, i.e. the human right to a healthy environment. It means that the settlements of the OZ (communities)receive funds to compensate for risk living in compliance with certain safety rules to maintain health. Legal regulation and constant awareness of population are the main directions for the formation of adequate assessments.