14.11.2016  The Rostov NPP Information and Public Relations Administration

The new technological solution enabling more effective repair activities will be implemented at the Rostov NPP

A new technological solution has been elaborated at the Rostov NPP’s centralized repair workshop making the power blocks’ operations safer and more effective.

This project is related to updating the screw gun of the VVER-1000 reactor’s primary seal. Thanks to the new technological development, the process of running the screw gun will be fully automated, which, in turn, will cut the time required to compress and to decompress the reactor’s primary connectors during the planned maintenance works. As a result, the power block’s capability utilization index (CUI) – its key performance indicator - will be increased.


Alexander Redlich, the chief specialist of the Rostov NPP’s centralized repair workshop, noted: “This modern screw gun can rival the famous and technologically complex German screw gun having simultaneous reactor pin extraction capabilities”.

The strategy of increasing the CUI calls for new operational methods in the planned maintenance activities. This technological solution will cut the time required for flange connector compression and decompression two times, thus making the flange connector operation safer. Some of our personnel will be available for more important activities. Thanks to this introduction, the polar crane will be utilized on a lower scale, too”, Ivan Malakhov, the deputy head engineer of the Rostov NPP maintenance, commented on the efficiency of the new solution.


Specialists believe that this implementation will entail maintenance time reduction, which, in turn, will result into progressing CUI.

The local scientists hope to start working on the production and implementation of the new automated screw guns for VVER-1000 reactors compression early next year.

The Rostov NPP is an affiliate company for Rosenergoatom Concern OJSC. The plant is based at the Tsymlianskoe reservoir shore 13.5 km away from Volgodonsk. The NPP operates VVER-1000 reactors with the installed capacity of 1000 megawatts. The power block No.1 commenced commercial operations in 2001, with the second and the third power blocks to follow in 2010 and on September 17, 2015, respectively. The power block No. 4 is currently under construction.

The up-to-date information on the nuclear environment close to the Russian NOOs and other nuclear objects is available at www.russianatom.ru


The Rostov NPP Information and Public Relations Administration.



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