Atomenergomash manufactured steam generators set for Belarus NPP Unit 2
17 April 2017 | Atomenergomash Media Center
The AEM-technology Company (a part of Atomenergomash, the mechanical engineering division of Rosatom) manufactured a set of PGV-1000 steam generators for the second power unit of the Belarus NPP.
The whole heat exchange equipment set, consisting of four ready-assembled steam generators, was fabricated at the Volgodonsk Branch facility of Atommash. The fabrication process included bottom stamping, vessel assembly and welding, filling with heat exchange pipes, and a range of quality assessment activities. Each steam generator vessel has eleven thousand stainless steel tubes installed inside it, their aggregate length is approximately 125 kilometres. Hydraulic, vacuum, ultrasonic, magnetic-powder, eddy current, and gamma x-ray tests were ran on the steam generators. In total, the QA/QC experts ran 315 tests on each piece.
As of now, the Belarus Party representatives completed the steam generators set acceptance, and they are being prepared for shipping, which is scheduled for the navigation season beginning.
The steam generator is a safety class 1 product. Four meters in diameter, approximately fifteen meters long. The equipment weight is 340 tons. The steam generator vessel is a cylindrical tank with two elliptical bottoms, it has coolant feed and drain pipes connected to its midsection. The vapour body is in the upper part of the vessel, and the heat transfer area is in the lower part. One power unit includes four steam generators. In 2016, Atommash optimized its process flow as per the Rosatom Production System (RPS) requirements. A showcase RPS-compliant steam generator JIT-manufacturing flow was implemented at the facility. Odd movements and interference of manufacturing operations performed on essential machining and welding equipment were eliminated, defects in welding junctures were reduced to a minimum. In the moment, the AEM-technology Company is technically capable of producing eight steam generators a year.
The Belarus NPP Project is a new 3+ generation nuclear power plant with two VVER-1200 power units. It is being deployed 18 km away from the city of Astravets (Grodno Oblast, Republic of Belarus). The reactor for the plant was designed by the OKB-Gidropress JSC, another subsidiary of Atomenergomash JSC.