Rosatom Completes Installation of Two Moisture Separator Reheaters for the Conventional Island of the BREST-OD-300 Lead-Cooled Fast Reactor

Rosatom announced on October 7, 2026 that at the construction site of the innovative BREST-OD-300 nuclear power unit in Seversk, Tomsk Oblast, a key milestone breakthrough has been achieved in the installation of core main equipment in the conventional island (turbine island) building, with two large moisture separator reheaters (MSR) successfully hoisted into their design-basis positions.

The two moisture separator reheaters installed this time are core large heat exchange equipment of the conventional island of a dual-loop nuclear power plant, each with a height of 16 meters and a net weight of 95 tons. The core function of this equipment is to perform moisture separation and deep superheating on the working steam after it passes through the high-pressure cylinder, and then send it into the low-pressure cylinder of the steam turbine for expansion and power generation, aiming to prevent the last-stage blades of the low-pressure cylinder from being subjected to high-speed droplet erosion (Droplet Erosion) caused by wet steam droplets, while significantly improving and enhancing the overall thermal efficiency and operational economy of the entire turbine-generator unit.

According to the overall on-site construction network schedule, the engineering team will fully complete the foundation pouring and structural construction of the turbine-generator unit before the end of 2026, and will then immediately move into the on-site precision installation phase of the main steam turbine body of the BREST-OD-300 unit.

The BREST-OD-300 nuclear power unit has a design electric power of 300 megawatts (MWe) and is the world's first demonstration fourth-generation lead-cooled fast neutron reactor (Lead-Cooled Fast Reactor, LFR) using liquid lead as coolant. As the core power generation subsystem of the fourth-generation reactor experimental demonstration energy complex (ODEK), this demonstration unit is located within the site of the Siberian Chemical Combine (SCC) under the Fuel Division of Rosatom, and is fully promoted and implemented by the core strategic major special project of the Russian nuclear industry, "Proryv" (Breakthrough).

The "Proryv" strategic special project aims to comprehensively build a new-generation nuclear energy technology platform for a closed nuclear fuel cycle (Closed Nuclear Fuel Cycle) relying on fast neutron breeder reactors and advanced dry reprocessing technology. This technical route is committed to eradicating the risk of catastrophic severe accidents at nuclear power plants from the level of inherent safety, eliminating the need for large-scale evacuation of surrounding residents under accident conditions, and achieving clean nuclear energy output without the need for long-term accumulation of high-level spent fuel; through multiple rounds of recycling and reuse of spent fuel, the "Proryv" project is expected to completely overcome the bottleneck of global natural uranium resource supply shortages, laying a pioneering demonstration foundation for the large-scale engineering deployment of commercial fourth-generation closed advanced nuclear energy.