DISSOLVED OXYGEN CONCENTRATION WATER DYNAMICS WITH DISCHARGE OF THE NUCLEAR POWER PLANT UNDER THE INFLUENCE OF TEMPERATURE EFFECT

This article presents the results of studies on the dynamics of changes in the concentration of dissolved oxygen (DO) in the river in the zone of influence of water discharge from a nuclear power plant (NPP). Water is use in the power generation cycle of a NPP, mainly for cooling to remove heat. Moreover, the operation of the cooling system of a NPP requires a large amount of water, and meanwhile, the removal of heat from the systems and components of a NPP results in the discharge of cooling system effluent with an increased temperature, which can affect the chemical quality of the water body. One of the main chemical quality indicators used to determine the ecological status of a water body is DO concentration, but this indicator is highly dependent on temperature. Аfter all, the discharge of water from a NPP with a temperature effect is highly susceptible to affect DO concentration. The popuse of this study is to determine the spatial and temporal changes in the concentration of DO with the establishment of variability factors and correlations between the concentration of DO and water temperature of the Styr River in the area affected by the temperature effect of the Rivne NPP. Overall, the studies conducted indicate that there is no negative impact of the nuclear power plant wastewater discharge.