The ventilation stack has been installed in the design position of the reactor building at Unit 1 of Rooppur NPP, which is being constructed under the Russian design in Bangladesh.
The weight of the stack is 100 tons, its length is 67 meters. The extremely difficult operation for the installation of the structure was performed with the help of a powerful crane. The installation, which lasted for 8 hours, started from gradual transition of the stack into the vertical position. Then the stack was raised to the height of several meters for checking of the slings and stability of the crane, after which it was brought to the installation area.
“After completion of the ventilation stack, which is designed for removal of excessive heat and moisture from the reactor compartment, the upper level of the reactor has reached the elevation of +99.500, and if we count the lighting rod arrester, it is +101.000, being exceeded only by the 175-meter evaporation cooling towers”, said Alexey Deriy, Director for Roppur NPP Construction Project. “Currently, works for installation of large size equipment are under way at the Power Unit. In August, we will continue the installation of the passive heat removal system elements - one of the most important safety systems in the reactor building”.
For reference:
The Rooppur NPP equipped with two VVER-1200 reactors totalling to 2400 MW is being built according to the Russian design 160 km from Dhaka, the capital of Bangladesh, in accordance with the General Contract dated December 25, 2015. The Russian design with VVER-1200 reactors that had been successfully implemented at two units of Novovoronezh NPP was selected for the first NPP in Bangladesh. This is an evolutionary Generation III+ design which fully complies with all the international safety requirements.
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