One of the four steam generators designed for power unit No. 1 of Kursk NPP-2 was delivered to the construction site.

The steam generator is part of the reactor plant. It is a heat exchanger and is designed to produce steam supplied to a turbine generator to convert its thermal energy into electricity. The steam generator weighs 355 tons and is one of the heaviest equipment items at the NPP.

“Modification of a steam generator for a PWR-TOI reactor plant has a number of design features. There is no steam collector at the top of the steam generator. Steam comes out of one pipe directly connected to the steam line. Besides, the length of the steam generator has been increased by one meter, now it is 15 m, the diameter is more than 4 m. Such design solutions make it possible to increase the reliability of the steam generator by reducing the number of welded joints, as well as its steam capacity - 1652 tons per hour (for a steam generator for PWR-1200 - 1602 tons per hour), which ultimately affects the increase in the capacity of the power unit", - said the first deputy director for the construction of new units of the Kursk NPP Andrei Osharin.

Inside the steam generator, there are collectors for supplying and removing hot coolant, to which 11 thousand heat exchange tubes with a total length of about 130 km are attached, laid in 105 horizontal rows.

The PWR-TOI design also implies a new arrangement of steam generators in the containment area, which allows for the placement of longer steam generators with the same internal diameter of the sealed envelope (44 m).

Steam generators for the Kursk NPP-2 were made at the Atommash plant in Volgodonsk, a branch of the AEM-technology company. The equipment is transported along the same route as the reactor vessel was delivered: first, 1500 km of the river route from the Tsimlyansk reservoir to the city of Semiluki, Voronezh region, and then 300 km by special vehicles to the city of Kurchatov.

All four steam generators are expected to be delivered to the construction site of Kursk NPP-2 by the end of 2021.