en.Wedoany.com Reported - The construction site of the Leningrad Nuclear Power Plant recently received the core component for the reactor shaft of Unit 3—the support truss. Manufactured by the Syzran Heavy Engineering Plant, this equipment weighs a total of 150 tons and was transported from the production base to Sosnovy Bor via specialized transport vehicles. An expert group has now completed the on-site acceptance, confirming the equipment's quality integrity and the consistency of the accompanying documentation. This marks the formal transition of the unit from civil construction to the installation phase of the reactor's core equipment.
The support truss is a critical device for the operational safety of the nuclear power plant, primarily used to reliably secure the reactor pressure vessel under various loads and potential seismic influences. According to the construction schedule, the installation work is scheduled for this summer. Prior to that, the construction contractor, the Titan-2 holding group, will complete the concrete pouring of the remaining three layers of the reactor shaft and simultaneously carry out the installation of the dry protection layer, the insulation layer for the reactor pressure vessel, and the base plate for the molten core catcher.
As an important component of the VVER-1200 unit, this equipment is the second large component supplied by Syzran Heavy Engineering for Unit 3. Previously, the passive safety system "molten core catcher" manufactured by the plant was installed last year. Subsequently, other supporting engineering equipment, including the refueling machine and condenser elements, will also arrive on-site in stages for installation in the reactor building and turbine hall, respectively.
The infrastructure department of the Leningrad NPP stated that, as the support truss directly impacts the operational reliability of the nuclear power plant, the acceptance process was jointly executed by the owner's experts and the general contractor. The currently under-construction Unit 3 follows the technical route of the already operational Units 1 and 2, ensuring the safety of third-generation nuclear power technology under high-gravity load conditions through strict on-site equipment compliance checks.
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