JSC AEM-Technology (a machine-building plant of Rosatom's Atomenergomash) has begun manufacturing two steam generator sets for Units 3 and 4 of the Kudankulam NPP (India).
Parts required to produce the two steam generator sets have already been delivered to the site of the company's branch in Volgodonsk. The plant has proceeded to the mechanical treatment of the vessel rings and large nozzles of the future steam generators. The nozzles are now being welded to the central rings. Once the quality of the rings is verified at the customer's presence, the steam generator vessels will be assembled.
The steam generator belongs to Safety Class 1 equipment. Its diameter is over 4 meters and its length is about 15 meters. The equipment weighs 340 tons. The steam generator vessel is a horizontal cylinder with two elliptical bottoms. The middle part of the generator hosts hot coolant inlet and outlet collectors. The upper part of the vessel holds steam, while the lower part contains 11,000 stainless tubes for thermal exchange. Each tube's diameter is 16 mm, with its length ranging from 10 to 14 meters. The tubes are anchored in both collectors. There are four steam generators in each reactor unit. The steam generator sets for the Indian NPP Units 3 and 4 will be shipped to the customer in 2018.