The 145-ton, 6-meter-high structure was installed in the reactor shaft using a Liebherr LR 11350 crane with a lifting capacity of 1,350 tons.
The company's specialists first assembled the reinforced concrete blocks of the enclosing structure together at the site next to the reactor building. The second tier consists of the middle second and middle third tiers. JSC MSU-90 carried out the installation and welding works. Quality control was carried out by specialists from the laboratory of Tomsk Polytechnic University.
The total weight of the enclosing structure is 429 tons, of which 312 tons have already been installed. It provides an additional barrier to protect the reactor facility.
The tasks of lifting and installing the structure in the reactor shaft were performed by specialists from site No. 7 of JSC MSU-90.
Sergey Abramov, Senior Work Manager of Section No. 7, JSC MSU-90:
“About 30 people were involved in the installation operation, since there are always many subtleties when accepting equipment into the reactor shaft and constant monitoring is required. The enclosing structure is the outer part of the reactor facility vessel. Its installation takes place in three stages, two of which have already been completed. Several months ago, the lower tier was installed, and now the middle tier has been installed. The pre-assembly of one stage itself takes about two months, and a little more time is required in the autumn-winter period. As for the enclosing structure, we still need to enlarge the connecting and upper tiers. And by the end of the year, we will install it into the reactor shaft. The final tier will be 4.5 meters high and weigh 115 tons. This year, our subdivision shall also install the intermediate shell, and finish installing the cooling and drying system pipelines”.
For information:
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.