Leningrad NPP-2 has completed the scheduled repair of the first power unit with a VVER-1200 reactor and brought it to full capacity. The work, which included replacing the generator stator with a reinforced version and updating key turbine components, was carried out by station specialists together with engineers from Lenatomenergoremont over 60.7 days.
During the repair campaign, engineers conducted a comprehensive overhaul of the reactor, turbine, and electrical equipment, tested the tightness of the reactor containment, replaced some spent fuel assemblies, and repaired cooling tower equipment.
Special attention was paid to improving generator reliability: the end windings of the new stator were reinforced, which increased resistance to vibrations and electrodynamic loads.
Additionally, the high-pressure regulating valves of the turbogenerator, which control steam supply and are responsible for precise power regulation, were updated. To ensure circuit cooling, one of the four circulation pumps was replaced. All work is aimed at extending the service life of the equipment and ensuring uninterrupted electricity generation for consumers in the Northwest.
Currently, two VVER-1200 power units (No. 1 and No. 2) and two RBMK-1000 units (No. 3 and No. 4) are in operation at the Leningrad NPP site. Their total load is 4370 MW. The first two RBMK-1000 units have been decommissioned and are in the conservation phase.
The day before, Perviy Tekhnicheskiy reported that the fourth power unit of the Leningrad NPP returned to operation after repairs. Specialists checked the resource characteristics and strengthened the protection of the RBMK-1000 reactor.
