First batch of pipeline valves for India’s Kudankulam nuclear plant units 5, 6 shipped from Russia


The first batch of pipeline valves for the under construction units 5 and 6 of the Kudankulam nuclear power plant (KNPP) in Tamil Nadu state has been shipped from the manufacturing facility in Russia, according to the Russian state atomic energy corporation Rosatom.

Rosatom is the equipment supplier and technical consultant for the KNPP, India’s largest nuclear plant.

A Rosatom statement earlier this week said that the first batch of valves consists of 26 pieces of equipment with a total weight of about 27.5 tonnes.

These specially designed valves can withstand temperatures of up to 350 degrees Celsius. The high-pressure and low-pressure gate valves are designed for installation in the turbine hall of an NPP.

“The key function of the shipped items is a tight shutoff of the fluid or gas flow to ensure reliable operation of the system,” the statement said.

According to Rosatom, each piece of equipment has been subjected to a set of factory checks, including pneumatic, hydraulic and tightness tests.

The pipeline valves are distinguished by a high class of tightness, which is confirmed by tests under operating parameters in testing laboratories accredited by Rosatom.

These valves are used in piping systems to monitor and control the flow of fluids or gases and are essential for the functioning of an NPP.

The statement said the equipment will be transported from the production site to the port of St. Petersburg by road and  thereafter, the equipment will be sent to Kudankulam by sea.

fThe KNPP units 1 and 2, of 1,000 MW capacity each, started commercial operations in 2014 and 2016, respectively. The construction is underway of four more units at Kudankulam – 3, 4, 5 and 6 – also of 1,000 MW capacity each.

Most of the equipment supplied from Russia for building the third and fourth units have already reached the KNPP.

The reactor pressure vessel for unit 4 was installed in late January 2024.