Image Courtesy: Atom Media
Russia’s newest next generation nuclear reactor has generated more than 2 billion kilowatt-hours of electricity just months after connecting to the national grid, marking a major milestone for the country’s expanding nuclear energy program.
The 1,250 MW VVER-TOI reactor at the Kursk Nuclear Power Plant officially entered commercial operation on May 1 following regulatory approval from Rostekhnadzor. The reactor, which began supplying electricity to Russia’s Unified Energy System in December, is now the most powerful operating nuclear unit in the country and the first commercial VVER-TOI reactor ever launched, according to a press release..
The new reactor has pushed the total generating capacity of the Kursk nuclear complex above 3,000 MW, placing it among Russia’s largest nuclear facilities. Russian state nuclear corporation Rosatom says the project forms part of a broader strategy to modernize the country’s nuclear fleet while gradually retiring Soviet-era RBMK reactors.
Kursk II is being constructed near the existing Kursk nuclear power plant in western Russia, roughly 60 kilometers from the Ukrainian border. The project is intended to replace aging RBMK-1000 reactors, several of which have already been shut down after decades of operation. While those reactors were originally designed for 30 years of service, Russia extended their lifespan through modernization programs before beginning the transition to newer reactor technology.
The VVER-TOI design represents the latest evolution of Russia’s pressurized light-water reactor systems and includes upgraded safety infrastructure, longer operational life expectancy, and both active and passive emergency protection systems. Rosatom says the reactor also includes a core meltdown localization system designed to contain severe accident scenarios.
Another major feature is the reactor’s ability to operate using 100% MOX fuel, a mixed oxide fuel containing uranium and plutonium. That capability could help expand fuel recycling and reduce long-term nuclear waste, areas that remain major priorities across the global nuclear industry.
Construction on additional VVER-TOI units at Kursk II is already underway, with four total reactors planned for the site. Once completed, the full facility is expected to reach 5,000 MW of generating capacity by 2034.
The milestone comes as nuclear energy regains momentum globally amid rising electricity demand from AI infrastructure, industrial electrification, and decarbonization efforts. Countries including China, India, France, and the United States are all accelerating investments into next generation nuclear systems as governments seek stable low-carbon energy sources capable of supporting future power grids.
