Potential and possibility of extending the campaign to increase VVER-1000 power units on sliding distribution of the secondary circuit

The paper considers the efficiency and possibility of implementing into operational practice VVER-1000 power units campaign extension mode at sliding pressure second circuit. history research Russian nuclear scientists in terms extending VVER reactors is considered. It shown that reducing fresh steam within permissible limits will release additional reactivity due to temperature effect generate energy during operation unit on effect. A mathematical model changes main parameters reactor plant has been compiled, including balance equations, Stodola-Flugel equation for turbine, equations thermal heat transfer generator. calculation expected increase electricity generation modern fuel loads performed. degree compliance proposed regime with current technological limitations «large series» analyzed. results analysis were confirmed by numerical experiment a multifunctional analyzer developed MEPhI Research Institute, built basis ENIKAD medium certified diffusion neutron-physical code PROSTOR. Conclusions are drawn about introducing units.