Russia Commissions Its Most Powerful Nuclear Reactor Unit at Kursk NPP-2

• April 30, 2026

Russia has officially put into operation the first power unit at the Kursk Nuclear Power Plant-2 (NPP-2), establishing it as the most powerful nuclear reactor unit in the country. This milestone reflects a significant advancement in Russia’s nuclear energy infrastructure.

The newly commissioned unit, featuring the advanced VVER-TOI reactor design, delivers a capacity of 1253 megawatts (MW). This makes it the largest capacity power block currently active within the Russian nuclear fleet.

Enhanced Capacity and Regulatory Approval

Following inspections, the Russian Federal Service for Environmental, Technological, and Nuclear Supervision (Rostekhnadzor) issued a confirmation certifying that the reactor unit complies with the technical design and safety regulations. This clearance allowed the transition of the reactor from its construction and testing phase to officially operating status.

The introduction of this high-capacity VVER-TOI power block reflects ongoing efforts by Russian authorities and nuclear industry enterprises to modernize and expand nuclear power generation capabilities, supporting the country’s energy security and industrial growth.

The unit’s activation at Kursk NPP-2 also aligns with broader trends in the energy sector focusing on enhancing electricity output while maintaining strict adherence to safety standards and environmental protection.

Details on subsequent commissioning stages for additional units or plans for further expansion at the site have not been disclosed at this time.

The first power unit at Kursk NPP-2 has entered operation with a capacity of 1253 MW, marking it the most powerful reactor in Russia.