World’s first lead-cooled nuclear plant installs massive 95-ton steam separators

Engineers in Siberia have installed two 95-ton steam separators at the BREST-OD-300 nuclear reactor. The operation marks a major step forward for the world’s first lead-cooled power plant.

“A 300 MW nuclear power unit with a BREST-OD-300 fast neutron reactor (the world’s first lead-cooled power reactor) is being built as part of the Generation IV Experimental Demonstration Energy Complex at the Siberian Chemical Combine as part of the Breakthrough strategic industry project,” said Rosatom in a press release.

Crews lifted the 16-meter-tall units into position inside the turbine hall in Seversk, a closed city in western Siberia. These massive heat exchangers play a critical role in dual-circuit atomic stations. They prepare steam before it enters the turbine’s low-pressure cylinder.

The equipment strips out residual moisture and reheats the vapor. Water droplets hit the metal blades like tiny bullets, causing severe erosion. Drying the steam protects the machinery from early wear and keeps the turbine running at peak efficiency.

Extracting more energy from uranium

Work at the site is moving quickly. Construction teams plan to finish the turbine unit’s foundation by the end of 2026. Once that concrete base is complete, engineers will begin installing the main turbine itself.

The project’s broader ambition lies in how the reactor handles atomic fuel. Commercial nuclear energy currently relies on thermal reactors. These conventional power plants burn only about 1% of the energy stored in natural uranium. The remaining 99% cannot be used easily, so operators must store it as dangerous radioactive waste.

BREST-OD-300 belongs to a new category called Generation IV reactors. These next-generation systems aim to extract far more energy from uranium while slashing waste stockpiles. Water cools most conventional reactors. In contrast, this 300-megawatt Siberian facility uses molten lead as its primary coolant.

The reactor relies on fast neutrons rather than slow thermal ones. This allows it to burn fuel that standard power stations leave behind. The core will run on a special mixture known as MNUP fuel. It contains no fresh uranium. Instead, technicians make it entirely from secondary byproducts, using depleted uranium and recycled plutonium.

Fast reactors also feature high fuel reproduction rates. They actually create more usable fuel than they burn during operation. At the same time, the fast neutrons destroy minor actinides. These highly radioactive elements usually stay hazardous for thousands of years. Burning them inside the core dramatically reduces the lifespan of the remaining waste.

A “Breakthrough” program

The facility forms the heart of Rosatom’s flagship “Breakthrough” program at the Siberian Chemical Combine. Russia wants to demonstrate a completely closed nuclear cycle in one location. Plant operators will not haul spent fuel away to distant disposal sites.

Instead, on-site facilities will reprocess the irradiated material and return it directly to the reactor. Rosatom says this inherent design prevents severe disasters, removing any need to evacuate local communities during an accident.

Russia is pushing hard to deploy these advanced technologies ahead of global rivals. Alongside the Tomsk project, state engineers are designing a larger BN-1200M sodium-cooled commercial reactor at Beloyarsk. If the Seversk experiment succeeds, it could turn centuries of nuclear waste into a self-sustaining power source.

Source: https://interestingengineering.com/energy/worlds-first-lead-cooled-nuclear-plant