Tendon sheathing injection was performed in 45 days.

Within this period, tendon sheathings with installed tendons of high-strength strands were filled in with the special injection. The injection mortar features low water loss, nonshrinking condition and consistency for over six hours and ensures tight and void free filling of the stranded tendon sheathings.

The special mortar was mixed at site using injection units. They ensure uninterrupted mortar mixing and grouting of the tendon sheathings.

Tendons system is a part of a common reactor building safety system. In case of excessive pressure inside the containment, both concrete shell and tendons system will compensate for it. Tendons are pushed through special channels - tendon sheathings - and fully gird the inner containment vertically and horizontally.


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.