Belarus entered the commercial nuclear power market much later than most European nuclear states, but the change to its electricity system has been rapid. The two reactors at the Belarusian Nuclear Power Plant near Ostrovets now provide close to 40% of the country’s electricity, giving nuclear energy a central role only a few years after the first unit began commercial operation.
The plant has reduced the importance of natural gas in electricity generation and supported a wider policy of electrifying heating, housing and parts of the economy. It has also tied Belarus more closely to Russia, which supplied the reactor technology, construction services, financing and fuel arrangements behind the project.
Belarus is now preparing to move beyond its original two-unit programme. A third reactor has been approved for the Ostrovets site, while possible locations for another nuclear plant are being examined in the eastern part of the country. The result is a nuclear sector that is moving from initial development into long-term expansion.
Ostrovets Created a New Nuclear Power System
The Belarusian Nuclear Power Plant is located near Ostrovets in the Grodno region, northwest of Minsk and close to the Lithuanian border. Its two units use Russian-designed VVER-1200 pressurised water reactors. Each was designed with a gross generating capacity of about 1,200 megawatts, while their combined net electrical capacity is approximately 2,220 megawatts.
Unit 1 was connected to the electricity grid in November 2020 and entered commercial operation in June 2021. Unit 2 reached the grid in May 2023 and began commercial operation in November of that year. Together, the reactors transformed Belarus from a country without commercial nuclear generation into one of the most nuclear-dependent electricity markets in Europe.
This concentration is important. Belarus does not operate a large fleet spread across several sites. Nearly its entire nuclear programme is located at one power station, making Ostrovets both a major source of electricity and a strategically important piece of national infrastructure.
Before the plant opened, Belarus depended heavily on natural gas, most of it imported from Russia, for electricity and heat production. Nuclear generation has not removed that dependence because gas remains important to the broader energy economy. However, it has changed the structure of the power sector by providing a large source of domestic electricity whose output is not directly linked to daily gas consumption.
The project also required more than the construction of two reactors. Belarus had to develop nuclear legislation, regulatory institutions, emergency systems, specialised education, grid connections and a workforce capable of operating a modern nuclear station. This supporting system is now part of the country’s permanent energy infrastructure.
Nuclear Generation Is Encouraging Greater Electricity Use
The value of Ostrovets depends partly on whether Belarus can make productive use of its large and relatively steady output. The plant was added to an electricity market that is smaller than those of many established nuclear countries, creating a need to stimulate demand and adapt the grid around nuclear generation.
National electricity consumption reached a reported 43.3 billion kilowatt-hours in 2024, an increase of about 6 billion kilowatt-hours over five years. Government policy has encouraged households and businesses to use more electricity for heating, hot water and other purposes that were previously served mainly by gas or conventional fuels.
New all-electric housing has formed part of this programme. Existing private homes have also been encouraged to convert to electric heating, particularly in areas where upgrading gas infrastructure would be expensive. These policies allow more of the electricity produced at Ostrovets to be used inside Belarus rather than leaving the system with a large surplus during periods of lower demand.
Nuclear power may also support industrial electrification. Belarus has promoted the plant as a foundation for new manufacturing, data-intensive industries and other activities that require reliable electricity. Whether these sectors develop at sufficient scale will help determine the economic value of additional reactors.
The expansion of electricity use creates its own infrastructure requirements. Distribution networks must be able to support electric heating during cold weather, while the national grid must balance the steady output of the reactors with changes in household and industrial demand. Flexible gas-fired generation, storage, grid controls and regional electricity connections therefore remain relevant even as nuclear power becomes more important.
Russian Technology Remains at the Centre of the Programme
Belarus’s nuclear programme is closely connected to the Russian nuclear industry. The Ostrovets reactors were built by Atomstroyexport, part of Rosatom, using a design already deployed within Russia. Russian support also covered major elements of project financing, engineering, construction, training and fuel supply.
This arrangement allowed Belarus to establish a nuclear programme without first creating a complete domestic reactor supply chain. Belarusian companies participated in construction and supporting works, but the core reactor technology and many specialised services came from Russia.
The partnership has given Belarus access to a modern Generation III+ reactor design and an established network of technical expertise. It has also created a long-term dependency. Nuclear plants operate for several decades and require fuel deliveries, replacement components, software, engineering support and specialised maintenance throughout their lives. Changes in relations with Russia or restrictions affecting nuclear trade could therefore have consequences for plant operations and future expansion.
Belarus has attempted to build more domestic capability through universities, technical colleges and specialist training centres. Nuclear physics, reactor operation, radiation safety and power-plant engineering have been added to the national education system. Ostrovets itself employs several thousand people and has become an important centre for technical employment in the Grodno region.
The country now has operating experience that it lacked when the original plant was approved in 2008. That experience reduces some of the organisational difficulty associated with adding another unit at the same site. However, Belarus remains dependent on an external reactor vendor rather than operating a technologically independent nuclear programme.
Safety, Regional Opposition and Radioactive Waste
The location of the plant has made nuclear safety a regional political issue. Ostrovets is relatively close to Lithuania and less than 50 kilometres from Vilnius. Lithuania has strongly opposed the project and has questioned its site selection, construction standards, emergency planning and regulatory oversight.
Belarus has maintained that the reactors meet modern safety standards and has hosted reviews and technical missions involving the International Atomic Energy Agency. The national nuclear regulator, Gosatomnadzor, is responsible for licensing, inspections and oversight of nuclear and radiation safety.
The dispute has influenced regional electricity trade. Lithuania adopted measures intended to prevent commercial imports of electricity from the Belarusian plant, while the wider Baltic region has reduced its historical connection to the Russian and Belarusian electricity system. This means Ostrovets cannot rely on nearby European markets as a simple destination for surplus generation.
Radioactive waste and spent nuclear fuel are also becoming more important now that both units are operating. Belarus has created dedicated funding arrangements using revenue from nuclear electricity sales to support waste management, future decommissioning, safety improvements and spent-fuel responsibilities.
Operational waste can initially be processed and stored at the plant, but the country still requires long-term facilities and policies covering higher-level waste and material returned after spent-fuel processing. A state commission has been formed to select a priority site for a radioactive waste disposal facility. Developing that site will be a necessary part of turning the construction programme into a complete nuclear life-cycle system.
A Third Reactor Changes the Scale of Belarusian Nuclear Power
In November 2025, the government decided to proceed with a third reactor at Ostrovets. The decision favours expansion of the existing site rather than immediately constructing a completely separate nuclear station.
Ostrovets already has transmission infrastructure, trained personnel, transport links, security systems and an established local nuclear economy. Using these assets could reduce the cost and complexity of the next project. The site has also been studied in detail, limiting the amount of new preparatory work required.
At the same time, Belarus plans to examine possible locations in the Mogilev region for a future second nuclear power plant. Such a project could distribute generation more evenly across the country and support economic development in the east. It would also be much more expensive than adding a reactor to the existing site because a new location would require its own supporting infrastructure.
The main question is no longer whether nuclear energy will remain part of the Belarusian electricity system. The existing reactors already make that unavoidable. The more important issue is how much additional nuclear capacity the economy can absorb.
A third large reactor would increase the need for electricity-intensive industries, electric heating, grid flexibility and possibly export routes. Its value will depend on demand growth as much as engineering. Belarus has successfully established a nuclear generation sector, but the next stage will require the country to build an economy and electricity system capable of using an even larger supply of continuous nuclear power.