September 22, 2022, Büyükeceli, Mersin Province, Türkiye. – The installation of the reactor pressure vessel (RPV), a key component of the Unit 2 reactor plant, has been completed at the Akkuyu NPP Construction Site.


Prior to the installation RPV delivered to the Akkuyu NPP construction site by sea in late December 2021, was carried from the temporary equipment storage site, where it had passed the incoming inspection procedure, to the installation area. RPV was installed into the design position in the reactor cavity using Liebherr LR 13 000 crawler crane. The installation operation took about 6 hours.


"The installation of the Unit 2 reactor pressure vessel is one of the main events of this year. I would like to note the impeccable work done by the installation team and lifting equipment operators. The vessel installation requires exceptional precision: the maximum permissible horizontal deviation does not exceed a tenth of a millimeter. I congratulate all installation personnel, crane operators and other specialists on successful completion of the Unit 2 RPV installation operation," noted First Deputy Chief Executive Officer of AKKUYU NUCLEAR JSC and Director of Akkuyu NPP under ConstructionSergei Butckikh.


During the previous construction stages of Unit 2 reactor building, the core catcher was installed; concrete-pouring of support and thrust trusses was performed; dry protection and thermal insulation of the cylindrical part of the reactor vessel were installed. The support ring which bears most of the vessel's weight, was installed prior to the RPV installation.


Unit 2 RPV installation was inspected by the committee comprising specialists of the vessel manufacturer, an independent inspection organization and the Nuclear Regulatory Authority (NRA) of Turkey.


RPV is one of the main LCP equipment of nuclear power plants. During the NPP operation, the reactor vessel contains the core. The core houses nuclear fuel, structural components for nuclear reaction and transfer of thermal energy to the coolant. The physical dimensions of the RPV are as follows: height – 11.45 meters, diameter – 5.6 meters, weight – 342.2 tons.


The manufacturing of RPV for Akkuyu NPP Unit 2 began in early March 2019. In the course of manufacturing, the whole set of tests was performed, including hydraulic tests and inspection assembly with reactor internals. Based on the test results, a special committee confirmed high quality of the equipment as well as the compliance with all design parameters.