JSC AEM-technology (a member of the machine-building division of the SC Rosatom—Atomenergomash) has embarked on the manufacturing of two sets of steam generators for Units 3 and 4 of Kudankulam NPP, India.
Blanks for two sets of steam generators have to date been delivered to the plant of Volgodonsk branch. Personnel have begun machining SG body shells and large branch pipes. Currently the branch pipes are being welded to the middle shells. After inspections of shell blocks being conducted in the presence of the customer's representative it is planned to start the assembly of SG bodies.
The steam generator is an article of safety class 1. Its diameter is over 4 m, length 15 m, and weight 340 tonnes. The SG body is a horizontally oriented vessel with two elliptical end heads, in the middle of which hot coolant supply and removal headers are located. In the top of the vessel there is steam room, while the bottom accommodates a heat exchange surface composed of 11,000 stainless steel tubes of 16 mm diameter and 10 to 15 m length. The ends of the tubes are joined to the two headers. The set of equipment for one power unit of an NPP of this type includes 4 steam generators. The SG sets for the Indian NPP are due to be shipped to the Customer in 2018.
Kudankulam NPP is a VVER-1000 PWR based nuclear power plant situated in the south of India, in the state of Tamil Nadu. The first unit of the NPP has since February 2016 been stably working at the 100 MW design capacity. The second was connected to India's national power grid on 29 August 2016. The general agreement for the construction of KKNPP Units 3 and 4 was signed with Rosatom in spring 2014.