Increasing NPP Maneuverability on the Basis of Heat Accumulation System and Additional Multifunctional Steam Turbine

The work investigates the increase of maneuverability of two-circuit NPP power unit with a VVER reactor using a multifunctional heat accumulation system and additional steam turbine. In a normal operation mode, the system generates electricity, whereas in emergency situations, the station blackouts, it allows to provide power supply necessary for cooling the nuclear reactor core. The main technological characteristic of the power complex, including a two-circuit nuclear power plant, a heat phase transition accumulator and an additional low-power multifunctional steam turbine were investigated. Substantiation of the choice of the heat-accumulation material and the operating mode of the system were provided, including the economic analysis of the energy complex under study.