Turkey's first nuclear power plant in Akkuyu NPP's second power unit is an important step more complete. The first tier was installed, with the process performed in the interior protection building of the unit.
In addition, the installation of the carrier beam, one of the most important elements of the reactor shaft equipment in the first power unit of the power plant, was also performed. With the passage of these two important stages, all processes foreseen for 2020 at the Akkuyu NGS construction site have been completely completed.
The assembly of the first layer of the inner guard building, which was performed using tower cranes, took 7 days. The sections consisting of a cladding plate and carcass designed to create structural rigidity were assembled individually. With these operations, a total of 5,7 compartments, each 7,5 meters high and about 10 tons in weight, were assembled. With the completion of the assembly, the height of the second power unit reactor shelter building increased to +4,950 meters. In the next step, the sections on the first layer will be fixed by welding together.
The inner guard building is one of the key elements of the reactor section security system. This structure ensures that the reactor building of the nuclear power plant is "sealed" in all operating conditions.
The work performed in the first power unit was the completion of the load-bearing beam, a 145-ton welded metal structure consisting of radial beams filled with specially compounded concrete. Liebherr LR 13000 heavy crawler crane was used in the assembly. The beam, with an outer diameter of 9,16 meters, was produced from carbon steel. The beam is designed to secure the reactor inside the concrete shaft. The beam assembly, which has the capacity to protect the reactor NGS from all kinds of heavy and seismic loads under all operating conditions, took a total of 6 weeks. In 3 weeks of this, the building site was assembled. In the next phase, it is planned to assemble the thrust beam designed for concrete pouring works up to +16,500 meters above the reactor shaft of the first power unit and to fix the reactor vessel from the top.
Making a statement on the subject, Akkuyu Nuclear A.Ş. Sergei Butckikh, First Deputy General Manager and NGS Construction Affairs Director, said:
“I am pleased to announce that we have completed all key processes planned in the Akkuyu NPP construction program this year. The assembly works of the first layer of the inner protection building in the 2nd power unit of the power plant and the carrier beam in the 1st power unit were carried out under the prescribed conditions. While there were no shortcomings regarding the work of the assembly staff, the quality of the works was accepted by a special commission that took the assembly works. I am sure that we will continue to progress without losing our pace next year. "