Works on pre-assembly of Unit 1 outer containment dome have started at the construction site of Rooppur NPP in the People’s Republic of Bangladesh (General Designer and General Contractor - ROSATOM Engineering Division). Assembly and subsequent erection and concreting works are performed by specialists of Trest RosSEM LLC branch office (part of Rosatom’s Engineering Division) in the People’s Republic of Bangladesh.
The outer containment dome consists of two parts: lower and upper one, which were dubbed the Skirt and the Headpiece by construction workers. The lower part is formed by 12 individual segments, the total weight of each being 18 tons including reinforcements, while the dome part is formed by 17 of such segments. The entire dome will be completely assembled on the ground, followed by installation of its lower part at elevation +48.880 m. After its alignment and fixing, the upper part will be installed at elevation +57.140 m. Upon completion of installation of both parts, the outer containment dome will be concreted.
The stage of outer containment dome preparation, assembly, installation and concreting is one of the longest in the construction of a power unit and amounts to 1,151 days. In order to reduce completion of this stage, RPS project “Optimization of 10UJA outer containment dome structures erection from elevation +16.450 to elevation +64.500 at Rooppur NPP” has been opened. With its successful implementation, the targeted duration of works under the project will amount to 584 days only.
“Installation of the outer containment dome is the final stage of civil works in construction of the power unit. It opens up a possibility for construction of structures and equipment of the passive heat removal systems and marks an important step for the beginning of physical start-up”, said Alexey Deriy, Vice President of ASE JSC - Project Director for Rooppur NPP Construction.
Installation of the outer containment dome is scheduled for October 2022.

Source: Communications Division of ROSATOM Engineering Division