The upper semi-vessel of the RPV for Rooppur NPP Unit No.1 Bangladesh has been assembled at the Volgodonsk Branch of JSC“AEM-technology” “Atommash” (part of Engineering Division of Rosatom – JSC “Atomenergomash”).
Preliminary the assembly of the reactor semi-vessel elements was performed - the professionals connected two shells and a flange. Then the product was moved to a welding stand, where, under heating, two circumferential welds were performed at a temperature of 150-300 degrees. In total, welding lasted 25 days. During the work, the professionals used 4667 kgs of flux and 3591 kgs of the wire with a diameter of 4 mm.
After the welding the item shall be heated up to 300 degrees. Using a bridge crane with a carrying capacity of 250 tons, the professionals move the product into the furnace for Heat Treatment for 6 days. The next stage in the manufacture of the nuclear reactor for the Unit No.1 of Rooppur NPP is the welding of the shells and the bottom of the lower semi-vessel.
Today, the reactor pressure vessel for the Unit No.2 of the Nuclear Power Plant in Bangladesh is in at different stages of manufacture. The professionals are performing the overlay of the nozzle area of the shell and preparing for the assembly of the upper semi-vessel of the reactor pressure vessel VVER-1200.
The Reactor represents a vertical cylindrical body with elliptic bottom with the Core and the Internals inside of it. The top of the reactor is tightly sealed with the cover with drive mechanisms and regulatory devices and protection of the reactors and nozzles for the cable outlet of in-core monitoring sensors. In the upper part of the vessel there are nozzles for coolant supply and removal, and also nozzles for emergency coolant supply in case of circuit depressurization.
JSC “Atomenergomash” is a complete supplier of all equipment of the reactor facility of Rooppur NPP and a significant part of the equipment of the power house. The enterprises of the Division produce reactors, steam generators, pump- and heat-exchange equipment.
Rooppur NPP is designed and built according to the Russian project. The station will consist of two Power Units with a capacity of 1200 MW each, with VVER type reactors of Generation 3+.