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Документ Classification of nuclear NPP reactors(Національний технічний університет "Харківський політехнічний інститут", 2023) Yefimov, Olexander Vyacheslavovych; Tiutiunyk, Larysa Ivanivna; Kavertsev, Valery Leonidovich; Harkusha, Tetyana Anatoliivna; Sydorkin, Igor DmytrovychThe article deals with the classification of NPP nuclear reactors. A nuclear reactor is a device in which a chain reaction of nuclear fission of heavy elements uranium, plutonium, and thorium takes place, which controls and maintains itself. The possibility of such a reaction is ensured by the fact that each act of nuclear fission produces two or three neutrons capable of causing the fission of other nuclear fuel nuclei loaded into the reactor. In the reactor, simultaneously with the nuclear fission process, there is always, firstly, the absorption of neutrons by materials located in the active zone, and, secondly, the outflow of neutrons from the active zone of the reactor. These two factors make it possible to regulate the nuclear fission process so that the number of neutrons in the active zone and the number of acts of fission per unit of time are constant. Nuclear reactors are very diverse in terms of their parameters, purpose, design and a number of other features. Nuclear reactors can be classified according to the following main distinguishing features: the amount of neutron energy that causes nuclear fission; by type of retarder; according to the type and parameters of the coolant; by constructive execution; according to the compositional decision; by appointment. At nuclear power plants, nuclear reactors are used to generate electrical and thermal energy. At nuclear power plants, they are used to generate thermal energy for the purpose of heating and industrial heat supply. In ship power plants, they are used as sources of thermal, mechanical and electrical energy.Документ Nature of the demand(Національний технічний університет "Харківський політехнічний інститут", 2022) Tiutiunyk, Larysa Ivanivna; Kasilov, V.; Ivanova, L.Документ Energy and energy supply(ТОВ "Планета-Прінт", 2021) Tiutiunyk, Larysa Ivanivna; Ivanova, L. A.; Kasilov, V. І.Документ Energy and energy resources(ТОВ "Планета-Прінт", 2021) Tiutiunyk, Larysa Ivanivna; Ivanova, L. A.; Kasilov, V. І.Документ A set of programs for analyzing technical and economic efficiency of NPP power units(ТОВ "Планета-Прінт", 2021) Yefimov, Olexander Vyacheslavovych; Tiutiunyk, Larysa Ivanivna; Kavertsev, V. L.; Harkusha, Tetyana AnatoliivnaДокумент Educational innovations and distance education under a pandemic COVID-19(2020) Tiutiunyk, Larysa Ivanivna; Falalieieva, Tetiana; Motovilnik, Anastasiia Vadimovna; Svitlychnyi, Ya.Документ Еnvironment and energy(Лідер, 2020) Tiutiunyk, Larysa Ivanivna; Kasilov, V.; Ivanova, L.Документ Reduction of nitrogen oxide and sulfur dioxide emissions(Лідер, 2020) Tiutiunyk, Larysa Ivanivna; Kasilov, V.; Ivanova, L.Документ Рurification of flue gas from boilers from sulfur compounds(Лідер, 2020) Tiutiunyk, Larysa Ivanivna; Kasilov, V.; Ivanova, L.Документ Sulfur emissions and environmental protection(Лідер, 2020) Tiutiunyk, Larysa Ivanivna; Kasilov, V.; Ivanova, L.