The bed drainage is designed to remove groundwater along the perimeters of all buildings of the “nuclear island”. It is a three-layered “pie”, where the first layer is 100 mm of lean concrete with geotextile on top. Then, there is a 150 mm layer of sand compacted to reach the factor of 0.95. The final, top layer is porous concrete, 250 mm thick. Overall, the builders have to lay 5,550 cubic metres of concrete and 3,670 cubic metres of sand. The work in the pit is being done at the design level minus 15.85 m.
The bed drainage is being implemented by PJSC SUS. The work has been going according to schedule since early September. Once it is done, the specialists will start laying the levelling concrete for the building and further concreting of the foundation slabs of the “nuclear island” of the LNPP-2 Power Unit3.
Work also continues on other facilities under construction. Asphalt work is ongoing on on-site roads. The builders have begun finishing works in the basement part of the joint firefighting pump station.
JSC MSU-90 is implementing the temporary heating system for the construction base. Specialists of the Power Supply Area of the SUS Branch of JSC CONCERN TITAN-2 are installing power supply networks for the lighting of the construction site. Another five lighting towers will be connected to the network and put into operation in the near future, in order to ensure safe traffic in the construction area during night hours.
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The TITAN-2 Holding is a Russian group of companies that builds nuclear facilities. Organisations of the Holding perform the whole cycle of works, from development of basic design documentation to facility commissioning.
The TITAN-2 Holding is the general contractor for construction of the new power units of the Leningrad NPP. At the construction site, the organisations of the Holding perform all civil construction, installation, and electric installation works.
The Holding participates in the construction of Akkuyu NPP in Turkey, Paks II NPP in Hungary and El-Dabaa NPP in Egypt.