The operation is aimed to conduct high-voltage and hydraulic tests of the equipment prior to the final assembly.
With the use of mechanical appliance the rotor, whose weight is over one hundred tons, and length is 15 meters, was brought out of the stator. Then with the use of a bridge crane it was moved to the test site. It was necessary to negotiate a certain complexity during the operation, that is, to precisely determine the slinging point taking into account the center of mass, part of the rotor being inside the stator. The air gap between the rotor circumference and stator bore did not exceed 40 millimeters.
Now the experts shall check the reliability of a number of the stator elements that ensure its safe operation, as follows: they will perform the terminal leadouts insulation check, high-voltage tests and hydraulic tests of the winding and stator core. After that the rotor will be finally brought into the stator and connected with the turbine shaft line.
Note:
The Holding “Titan-2” is the largest in the North-West group of companies, erecting the most important objects of the nuclear industry and energy. The organization performs a full range of construction and installation works from engineering to commissioning.
The Holding “Titan-2” is one of the main contractors for the construction of power units No. 1 and No. 2 of the Leningradskaya NPP-2. Main organizations of the company perform 30% of general construction and 80% of installation works on the site. Specialists of the holding are engaged on the objects of the Leningradskaya NPP-2 first and second power units. The works are being performed in the buildings of the reactor, turbine, electricity, water, heating system and other structures of power units.