Technicians at the Volgodonsk branch of JSC (AEM-technology) Atommash have begun work on the final stage of manufacturing of the reactor for Akkuyu NPP under construction in Turkey.
The company is a division of Atomenergomas, a machine-building subsidiary of Russian state-owned Rosatom.
The final stage involves check the assembly of the reactor vessel with internals and cover.
The purpose of the assembly check is to ensure the reactor cover, the reactor vessel and manufactured internals will allfit when assembled on site. The operation is carried out in a special underground bench-caisson.
A core barrel weighing 73 tons is placed inside the reactor vessel. Installation of the core baffle (38 tons), protective tube unit (68 tons) and reactor cover (90 tons) is carried out in turn. During assembly, the appropriate fastening keys will be installed to secure the device in order to properly center the reactor cover. The alignment of the holes in the nozzles of the protection control system of cover with the support elements of the core barrel and the flanges of the protective tube unit will be checked. In the future, the check assembly will significantly reduce the time required for the installation of the reactor with internals at the site of the NPP under construction.
The reactor is a vertical cylindrical vessel with an elliptical bottom, inside of which the active zone and internals are located. The top of the reactor is hermetically sealed by the cover with mechanism drives and controls and protection of reactors installed on it, as well as nozzles for outlet of sensor cables for in-core monitoring.
The Akkuyu Nuclear Power Plant will be the first commercial nuclear power plant in Turkey. Four VVER third generation VVER reactors with a total capacity of 4,800 MW are under construction.
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