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Atommash has manufactured the upper semi-vessel of the RPV for Unit No.2 of Rooppur NPP


2020-07-06 12:41:55

The Volgodonsk Branch of JSC "AEM-technology" "Atommash" (part of the Rosatom Engineering Division - "Atomenergomash") has been manufactured the upper semi-vessel of the RPV for Unit No.2 of Rooppur NPP in Bangladesh.

First, the professionals put together two shells and a flange. Further, with the help of a hoisting crane, the item was moved to a welding stand, where after preliminary heating they began welding of two circumferential welds at a temperature of 150-300 degrees. In total, welding continued 25 days. During the work, the professionals used 4027 kilograms of flux and 3057 kilograms of wire with a diameter of 4 mm.

After welding operation, the product is heated up to 270 degrees. With the help of a bridge crane with a hoisting capacity of 250 tons, the professionals move the product into the furnace to conduct the HT for 4 days. The next manufacturing step of the nuclear reactor for Unit No.2 of Rooppur NPP is the welding of shells and the head of the lower semi-vessel.

The reactor represents a vertical cylindrical body with an elliptical head, inside of which there are the Core and the Internals. On top, it is sealed with a Cover with drives mechanisms and regulating bodies installed on top for the protection of the reactors and nozzles, intended for the sensor cables output for in-core monitoring. In the upper part of the vessel, there are nozzles for the coolant input and output, as well as nozzles for emergency supply of the coolant if the circuit is depressurized.

The "Rooppur" NPP is designed and built according to the Russian project. The plant will consist of two power units with a capacity of 1200 MW each, with VVER reactors of 3+ generation.

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Joint-Stock Company "AEM-technology", founded in 2007 in the structure of JSC "Atomenergomash", an engineering division of the state corporation Rosatom, is currently one of the leading Russian companies in the field of power engineering. The structure of the company includes an engineering department, staffed by experienced designers and process-engineers, as well as two production sites: the Branch of JSC "AEM-technology" "Petrozavodskmash" in Petrozavodsk and the Branch of JSC "AEM-technology" "Atommash" in Volgodonsk.