Project company Akkuyu Nuclear said on June 1 that experts had completed the welding of the main circulation pipeline (MCP) of the Akkuyu NPP Unit 1 under construction in Turkey.All 28 joints were welded as planned between March 19 and May 25, after which an awards ceremony was held for the participating workers and experts.The work was carried out by the joint venture Titan2 IJ Ichtash Inshaat Anonim Shirketi, the main contractor for the construction of the Akkuyu NPP.Quality control is overseen by experts from Akkuyu Nuclear JSC, the Turkish Nuclear Regulatory Authority (NDK) and Assystem, an independent building control organization.
After each weld is welded, the welded joints are inspected using ultrasonic, capillary and other control methods.At the same time as welding, the joints are heat treated.In the next stage, experts will create a special stainless steel covering on the inner surface of the joint, which will provide additional protection to the pipe wall.
Anastasia Zoteeva, general manager of Akkuyu Nuclear Power, awarded special certificates to 29 people,” she said. “We can say with confidence that we have taken an important step towards our main goal – the start-up of the first nuclear power plant at Akkuyu Nuclear Power Plant. unit.She thanked all involved for “responsible and diligent work, highest professionalism and efficient organization of all technical processes”.
The MCP is 160 meters long and the walls are made of special steel 7 cm thick.During the operation of the nuclear power plant, the primary coolant will circulate in the MCP – deeply demineralized water at a temperature of up to 330 degrees Celsius at a pressure of 160 atmospheres.This remains separate from the seawater in the secondary loop.The thermal energy generated in the reactor is transferred from the primary circuit to the secondary circuit through the heat exchange tubes of the steam generator to generate saturated steam, which is sent to the turbine to generate electricity.
Image: Rosatom has completed the welding of the main circulation piping for Akkuyu NPP Unit 1 (Source: Akkuyu Nuclear)