Chennai, May 12 (IANS): Russia's integrated nuclear power player Rosatom on Thursday said critical components for the upcoming atomic power plant number 5 at Kudankulam in Tamil Nadu have been made by its group company.

According to Rosatom, the group company has manufactured four guide vanes for reactor coolant pump set (RCPS) housings for Unit 5 with a generation capacity of 1,000 MW.

The Russian nuclear power major said RCPS housing is a first safety class item. At a nuclear plant, it ensures coolant circulation in the primary circuit and operates under pressure of 160 atmospheres and temperature of 300 degrees.

The reactor plant equipment of one power unit includes four RCPS.

Each guide vanes consists of upper and lower discs, between which 13 guide blades are welded. The vanes are fixed in the pump housing and designed to direct coolant flow inside the pump, Rosatom said.

India's atomic power plant operator Nuclear Power Corporation of India Ltd (NPCIL) has two 1,000 MW plants (Units 1 and 2) at Kudankulam, while four more (Units 3, 4, 5 and 6) are under construction.

All the six units are built with Russian technology and equipment supplied by Rosatom.