Evaluation of NPP Efficiency Using Phase-Transition Batteries

In the context of growing share nuclear power plants in energy systems European part Russia and shortage flexible generating capacities, it becomes necessary to involve covering variable load schedule. With relatively low prices for fuel (at present, equivalent cost a uranium is five six times lower than natural gas inside country) high specific capital investments plants, not economically efficient unload them. Therefore, combination with latent heat thermal storage (LHTES) an additional steam turbine makes possible accumulate generated at night use during peak hours generate electricity maximum fuel, i.e., without changing reactor. addition, presence turbogenerator emergency situations complete blackout NPP ensure operation cooling by using residual reactor drive and, thereby, increase safety level NPP. The analysis wholesale capacity market Unified Energy System (WECM UES) system France (with highest plants) was carried out. impact unit assessed addition alternative option: construction pumped plant (PSPP) WECM. Calculations technical economic indicators LHTES-based accumulators NPPs are out depending on latter as well regulation range supply. It shown that if we do take into account multifunctional properties complex based LHTES (increased safety, participation primary frequency control) existing difference periods day-ahead market, payback provided. return investment phase-change batteries considered example can be achieved provided between average over billing period 25 years 3400 rubles/(MW h) charging time/LHTES discharge exceeds 7 h per day.