Atommash, part of the Atomenergomash engineering division of Russian state nuclear corporation Rosatom, has completed the core barrel, or shroud, of the reactor vessel for unit 1 of the Rooppur nuclear power plant in Bangladesh. The equipment, a key part of the reactor internals, consists of six shells and an elliptical bottom. It is about 11 metres high and weighs 63 tonnes.

Its upper section has 238 holes, each with a diameter of 196 millimetres, and two more with a diameter of 300m. These are arranged in six rows around the perimeter and are exit points for the reactor coolant. Its lower section has 1344 holes with diameters of between 40mm and 60mm, as well as 163 holes with a diameter of 226mm. These are for the installation of supports and to protect the fuel assemblies from mechanical particles entering them.

Atomenergomash is the supplier of all reactor equipment for the Rooppur plant, which is under construction on the eastern bank of the river Ganges and which will consist of two 1200MW power units.