en.Wedoany.com Reported - The first phase of concrete pouring for the turbine and generator foundation has been completed at Russia's BREST-OD-300 lead-cooled fast reactor project. The reactor is being built at the Siberian Chemical Combine in Seversk, Tomsk Oblast, as part of a pilot demonstration energy complex. The project aims to demonstrate closed fuel cycle technology and lay the groundwork for the construction and export of future larger-capacity Generation IV nuclear power units.

Construction workers poured 578 cubic meters of heavy concrete. With 36 built-in spring vibration isolators, the foundation will effectively reduce the vibration loads from the turbine unit on the foundation piers and other process equipment. The concrete will reach the required strength in two weeks, after which installers will begin the next phase of support plate installation. In the fall of 2026, the builder plans to begin installing the turbine and generator with a rated electrical capacity of 300 MWe. The turbogenerator set, manufactured by Russian Power Machines, features a fully air-cooled design and weighs over 1,700 tons in total.

Meanwhile, construction of the nuclear island continues. As of the end of 2025, the contractor had completed the installation of the reactor central cavity shell and peripheral cavity shells. In the near future, special heat-resistant concrete will be filled between the cavities to ensure the structural integrity of the primary coolant boundary and provide thermal shielding and radiation protection. In addition to the BREST reactor, this closed fuel cycle demonstration project includes a fuel fabrication and refabrication module and a spent fuel reprocessing module. The fuel fabrication unit was put into operation in December 2024.

Assembly of the reactor vessel is scheduled for completion by the end of 2026, with the startup date adjusted to 2029. In the future, Rosatom plans to extend this closed fuel cycle technology to the BR-1200 unit (1200 MWe). According to the power generation facility plan through 2042, eight units will be built at multiple new sites, with an export version expected to be launched around 2035.

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