On the 2nd power unit of LNPP under construction the auxiliary power was provided from the 330 kV gas-insulated switchgear to normal operation power supply building.

Therefore, new conditions were created for further permanent power supply to the equipment and machinery of the power unit.     

The JSC SEM team was challenged to fully complete construction and installation works related to the power distribution equipment, cable trestles, tunnels, and normal operation power supply building. For this purpose, construction works, preparation of cable routes, premises finishing, equipment and materials supply, installation of cable metal structures, laying of HV and control cable were performed for several months.

A large work scope was realized to install the fire alarm and firefighting systems. In addition, the JSC SEM specialists developed and implemented the equipment operating current supply design. The JSC SEM specialists of areas No.1 and No.2 installed the equipment and relay panels in record time.  
The switching electric installations were tested by operating voltage. The test voltage supply lasted 12 hours. The milestone was considered completed.


Titan-2 Holding is the largest in the North-West group of companies, constructing the most important nuclear industry and power facilities. The company performs a full range of construction and installation works from engineering to commissioning.

Titan-2 Holding is the general contractor for the construction of the Leningrad NPP-2 power units. The Holding Companies perform all the civil, installation, and electrical works at a construction site. The works are carried out in the reactor, turbine, power supply, water supply, heat cogeneration buildings and other power unit structures.

The Holding is the main contractor for the construction of the Hanhikivi-1 NPP in Finland.