his is one of the most important operations of the current year.

60 installers and 24 welders will take part in this activity. The personnel will have to mount 260 tons of pipelines and metal structures, weld 28 pipeline joints and connect the pipeline with the main equipment of the reactor plant.

According to the work execution design, welding of the main reactor coolant pipeline will be performed within 108 days. The reactor coolant pipeline welding process at the first power unit took 109 days. Based on this experience, it is planned to complete the welding procedures within 104 days.

The reactor coolant pipeline connects the equipment of the NPP primary circuit, such as reactor, steam generators and reactor coolant pumps. The coolant circulates therein with water temperature of 320 °C and under the pressure of up to 17.6 MPa. The length of the reactor coolant pipeline is approximately 160 meters.


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.