Passive Security System Installation Completed at Akkuyu NPP 1st Power Unit

According to the statement made by Akkuyu Nükleer AŞ, experts at the Akkuyu NPP, built by the Russian State Nuclear Energy Corporation Rosatom, completed the phased assembly of components consisting of 90 equipment and structural elements, including deflectors, heat exchangers and electromagnetic devices. In the final stage of the installation, ventilation pipes were placed in the dome of the reactor building and concreting was carried out on the PHRS floor slabs. Thus, the 1st power unit was equipped with all the necessary security systems to carry out the preparation process for commissioning. Akkuyu NPP consists of four power units with 3+ generation VVER reactors, each with a capacity of 1200 megawatts. Modern NPP designs with VVER reactors are equipped with additional passive safety systems, including PHRS, in addition to traditional active safety systems. PHRS, an important element of the security systems of 3+ generation NPPs, was first installed in the new power units of Novovoronezh NPP in Russia, which is the reference power plant of Akkuyu NPP. Sergei Butckikh, General Manager of Akkuyu Nükleer AŞ, whose views were included in the statement, said: "We have completed the installation of passive heat removal system structures in the 1st Power Unit. This is the result of months of coordinated work by experts and is an important stage in the preparation for the commissioning of the power unit. PHRS is one of the many safety systems found in modern power units with VVER-1200 type reactors. The system works thanks to natural physical processes that do not require power supply or operator intervention."