Installation of the circular (polar) crane bridge has been completed in the power unit 2 reactor building at the site of the Rooppur NPP under construction (in the People's Republic of Bangladesh). The "Energospecmontazh” JSC specialists have performed works on lifting and installing the polar crane bridge beams on the rail tracks at +38.50m elevation using a Liebherr heavy crawler crane of 1350t lifting capacity.
“The next milestone has been completed at the Rooppur NPP power unit 2. The polar crane installation is one of the crucial events in construction of the power unit. After the adjustment and testing of the crane, installation of the main heavy equipment and pipelines will start in the reactor compartment, ” Aleksey Deriy, ASE JSC Vice- President - Director of the Rooppur NPP Construction Project commented.
Currently, the works related to installation of the crane structures and mechanisms on the crane track are under way.
The polar crane is being installed under the dome of the inner containment of the NPP reactor building. The crane bridge travelling along the circular rail above the reactor shaft and the polar crane trolley travelling along the bridge allows handling operations at any point in the reactor compartment. By using the polar crane of 360t lifting capacity, all heavy equipment will be installed, including the steam generators and the reactor vessel itself. After the NPP is put into operation, the crane will be used for repair works and fuel transportation.
The installation of the polar crane bridge will complete installing of reinforced structures at the inner containment tier 5 at the Rooppur NPP power unit 2 and its concreting by the end of December.
At present, the assembly and welding of the reinforced structures at tiers 6, 7, 8 of the inner containment dome at the power unit 2 reactor building has started on two stands located in the immediate vicinity of the power unit.
The Rooppur NPP having two VVER-1200 reactors and the total 2400 MW capacity is being constructed under the Russian design, in 160 km from Dhaka, the capital of Bangladesh, in accordance with General Contract dated December 25, 2015. The General Contractor for Rooppur NPP construction is Atomstroyexport JSC (the Engineering Division of Rosatom). The Russian design with VVER-1200 reactors was selected for the first NPP in Bangladesh, that was successfully implemented at two units of Novovoronezh NPP. This is an evolutionary Generation III+ design which fully complies with all international safety requirements.