Development of the regulation of hydrobiological monitoring in circulation cooling system of the Zaporizhzhia nuclear power plant

Abstract

The article proposes a new approach to solving the problem of biofouling at the facilities of the circulating cooling system of the Zaporizhzhia Nuclear Power Plant (ZNPP) by regulating hydrobiological studies. In the course of the studies, 4 species of hydrobionts were found that formed massive fouling on water supply facilities: filamentous algae Oedogonium sp. and Ulotrix zonata with a total biomass of 123.6±18.44 g/m2, tropical molluscs Melanoides tuberculata and Tarebia granifera of the Thiaridae family with a biomass of 20.09 g/m2. The shells of dead mollusks drifted along the pipes of the circulation system with the flow of water and interfered with the operation of pumping stations. Also, the blue-green algae Microcystis aeruginosa, which dominated the phytoplankton of the cooling pond, belonged to the potential bio-hindrances. The hydrobiological regulation was developed with the aim of timely detection of hydrobionts capable of active reproduction and creation of biological obstacles. It provides for four types of monitoring: current (operational), extreme (control), deployed (research) and background (hydrobiological monitoring of the Kakhovka reservoir in the zone of influence of waste warm waters). For each type of monitoring, the subjects of control (a group of hydrobionts), control parameters (species composition, abundance, biomass) and frequency of control are determined. The regulation of hydrobiological monitoring makes it possible to minimize the consequences or prevent the occurrence of accidents and emergencies in the operation of the ZNPP cooling circulation systems associated with biological obstacles, and can be used as an example for solving similar problems at other power facilities. The article also contains practical recommendations for improving the ecological state of the cooling pond and preventing the massive development of dangerous aquatic organisms by introducing biomeliorator fish with a different food spectrum into the reservoir

Impact of hydrotechnical construction on aquatic ecosystems of the Kiliia branch of the Danube Delta

“…People have long been using the resource potential of the deltas to develop industry, transport, agricultural and fishing economies, for recreation, etc. (Yermolenko et al, 2022;Yesipova et al, 2022). Over the recent decades, special attention was paid to complex studies of delta ecosystems, and currently the focus is on the control of anthropogenic impact and quality of ecosystem services.…”

Species specifics of morphology of the liver of the fishes of the Cyprinidae family

“…Provision of mankind with proper products of aquaculture is possible only by introduction of modern industrial technologies, based on modern scientific achievements, into fishery (Lushchak et al, 2001;Hrytsyniak & Tretiak, 2007;Sharamok et al, 2017;Kurchenko & Sharamok, 2020;Yesipova et al, 2022). At the same time, technogenic factors impact the fishery, causing metabolism impairments that are negative for the fish productivity (Bols et al, 2001;Silkina & Mikrjakov, 2017).…”

Оцінка Якості Та Екологічницй Стан Річки Саксагань У Контексті Господарсько-Питного Та Рибогосподарського Призначення

“…Also, salted waters from quarries and mines, surface filtration waters, domestic and domestically treated effluents, effluents from treatment facilities are pumped to tailings storage facilities, which are the main accumulator of waste water and occupy a total area of more than 76 km 2 . The average water mineralization in the tailings reservoirs reaches 5-8 g/dm 3 , and its total volume is 200 million tons. Annual losses from filtration into the soil from tailings are approximately 6-8 million m 3 , which causes flooding, salinization of fertile lands and pollution of natural underground and surface water bodies [16].…”