Installation of PHRS at unit 2 of Rooppur NPP

Installation of the inner and outer parts of steel structures of the passive heat removal system (PHRS) deflector at unit 2 of the Rooppur NPP under construction in Bangladesh was completed in two days according to ASE JSC (part of Rosatom).
Following installation of the inner and outer parts of the deflector in the design position at elevation 64.5 metres, the height of reactor building reached 74.85 metres.
In terms of design, the deflector is a metal cylinder made of stainless steel, with the weight of 215 tonnes and the diameter about 25.5 metres.
The PHRS deflector is an aerodynamic structure designed to augment thrust in the ventilation channel and to increase efficiency of the ventilation system. The advantage of passive heat removal is that it can operate using permanent natural processes, without requiring operator involvement or a power supply.
The Rooppur plant is being built by Rosatom on the eastern bank of the Ganges River in Bangladesh’s Pabna district, about 160 km northwest of Dhaka. The plant’s design life is 60 years with the possibility of extending its operating life for another 20 years.

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