16.10.2023
INFORMATION AND PUBLIC RELATIONS DEPARTMENT OF THE KURSK NPP
At the Kursk NPP-2, work on concreting the dome of the internal containment of the second power unit has been completed
In the reactor building of the second power unit, concreting of the dome of the internal containment (IC) has been completed. This is the final stage of construction of one of the physical barriers of defense in depth at nuclear power plants. In total, about 3,500 cubic meters of concrete mixture were laid into the structure of the dome part with a height of 19.4 meters and an internal diameter of the base of 44 meters. Upon completion of concreting, the top of the dome of the internal protective shell reached 61,700, the wall thickness was 1200 mm.
The internal containment is one of the main elements of the safety system of a nuclear power plant. It not only protects the reactor compartment, but also provides support for pipeline penetrations and the polar crane with which the nuclear reactor is serviced.
“The completion of concreting of the internal containment of the second power unit is one of the significant events at the Kursk NPP-2 construction site,” explained First Deputy Director for the Construction of New Units Andrey Osharin. “This gives a start to preparations for the next stage of work in the reactor building of the second power unit - the installation of a containment prestressing system, which greatly enhances the strength of the internal containment shell.”
Throughout the entire concreting process, laboratory quality control of the concrete mixture was performed. Only when the required technological characteristics were confirmed, the concrete mixture was allowed to be placed in structures.
“When concreting the dome of the internal containment of the second power unit, we used similar experience from work on power unit No. 1,” explained Oleg Shperle, vice-president and project director for the construction of the Kursk NPP of ASE JSC. This allowed us to optimize the work process. Concreting was carried out continuously in day and night shifts with the participation of about 80 contractor specialists.”
The Kursk NPP-2 construction project provides for two protective shells for the reactor buildings - internal and external, which serve as physical protection from man-made and natural influences.
The internal containment is one of the main elements of the safety system of a nuclear power plant. It not only protects the reactor compartment, but also provides support for pipeline penetrations and the polar crane with which the nuclear reactor is serviced.
“The completion of concreting of the internal containment of the second power unit is one of the significant events at the Kursk NPP-2 construction site,” explained First Deputy Director for the Construction of New Units Andrey Osharin. “This gives a start to preparations for the next stage of work in the reactor building of the second power unit - the installation of a containment prestressing system, which greatly enhances the strength of the internal containment shell.”
Throughout the entire concreting process, laboratory quality control of the concrete mixture was performed. Only when the required technological characteristics were confirmed, the concrete mixture was allowed to be placed in structures.
“When concreting the dome of the internal containment of the second power unit, we used similar experience from work on power unit No. 1,” explained Oleg Shperle, vice-president and project director for the construction of the Kursk NPP of ASE JSC. This allowed us to optimize the work process. Concreting was carried out continuously in day and night shifts with the participation of about 80 contractor specialists.”
The Kursk NPP-2 construction project provides for two protective shells for the reactor buildings - internal and external, which serve as physical protection from man-made and natural influences.
Energy is the basis for the progressive social and economic development of the country, the supply of industry and citizens. The Russian fuel and energy complex continues the implementation of new projects and the planned renewal of capacities. This work is performed taking into account modern trends in digitalization and the replacement of imported equipment. Rosatom and its enterprises take an active part in this work.
Power units No. 1 and No. 2 of the KuNPP-2 of generation “3+” are pilot ones, being built according to the PWR-TOI project (standard optimized informatized pressurized water power reactor). This is a new project created by Russian designers (JSC Atomenergoproekt) on the basis of technical solutions for the NPP project with VVER-1200. They have improved technical and economic indicators. Compared to other 3+ generation power units, the VVER-TOI project assumes a significant reduction in the cost of construction, terms, and operating costs. The capacity of each power unit increased by 25%, up to 1255 MW compared to the power units of the operating Kursk NPP.
Power units No. 1 and No. 2 of the KuNPP-2 of generation “3+” are pilot ones, being built according to the PWR-TOI project (standard optimized informatized pressurized water power reactor). This is a new project created by Russian designers (JSC Atomenergoproekt) on the basis of technical solutions for the NPP project with VVER-1200. They have improved technical and economic indicators. Compared to other 3+ generation power units, the VVER-TOI project assumes a significant reduction in the cost of construction, terms, and operating costs. The capacity of each power unit increased by 25%, up to 1255 MW compared to the power units of the operating Kursk NPP.
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