Welding of the main coolant pipeline (MCP) has been successfully completed in the reactor building of Unit 2 at Rooppur Nuclear Power Plant (NPP).
The entire process of joining, welding, and heat treatment of 28 weld joints took 60 days.
The main coolant pipeline is a system of pipes connected to the primary circuit, said an official press statement.
It consists of four loops, each of which is connected to the reactor and reactor coolant pump and steam generator. The MCP is 140 meters long with an inner diameter of 850 mm and weighs 238 tons.
“During the NPP operation, coolant with a temperature of 320 degrees centigrade will be circulating through the MCP, therefore, pipeline welding is a very responsible process involving the most experienced welders,” said Alexey Deriy, ASE Vice President and Director of Rooppur NPP Construction Project.
He added, “Each weld joint passes seven inspections at different work stages, which guarantees its reliability and quality.”
About one hundred employees of Energospetsmontazh were engaged in the work. Specialists from NIKIMT-Atomstroy provided technical, expertise, and consultation support.
The Engineering Division of Rosatom State Corporation of Russia is implementing the project as the general contractor.