The installation of the dome equipment will finish soon. After that, the structure will be installed onto the reactor building.

For the last several months, the subcontractors were assembling the dome on the special bench. The structure is made of 37 metal plates and weighs approximately 170 tons.

To finalize the assembly, the specialists moved the dome to the nearby bench used to assemble the previous inner containment tier.

The dome is already equipped with the ventilation system. Today the specialists will finish the assembly of the maintenance platform located at the center of the dome. The fourth circle of the sprinkler system will also be installed here. This circle will reduce the steam pressure inside the inner containment in case of emergency. It will be used to spray boron and other chemicals to prevent radioactivity spreading.


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.