Novovoronezh NPP has successfully completed upgrades of Turbine Generator Set No. 14 (TG-14) at Unit 5. On the 28th of September 2017 the turbine was brought to full power.
To remind, TG-14 was shut down in June 2017 and the repair lasted 105 days. This division-wide project was implemented as part of introduction of the ROSATOM Production System (RPS) at the corporate enterprise and aimed at optimizing process operations.
The upgrades included repairs of high and medium pressure rotors. Following replacement of the blades and diaphragms with the modernized ones the turbine electric power capacity can increase in 15 MW.
This was a very complex technological operation. The turbine rotor was dismantled and, in a special transportation package, moved to Power Machines works in Saint-Petersburg. It was there where blades were changed. Specialists changed diaphragms and rotor blades in high and medium pressure sections. Then, it was delivered to the power unit where a set of adjustment and assembling works was done, Deputy Chief Engineer for Operations at Unit 5 Nikolay Stepin told about the work progress.
To note, the upgrading of Unit 5s turbine is a unique operation which was done in Russia for the first time. Such turbine is only in the country and we upgraded it by changing rotor blades, Chief Engineer of NPP Sergey Vitkovsky noted. Novovoronezh NPP, which is the flagship plant of Russia, traditionally, has to adopt most of innovations in nuclear power. We are the pilot site for construction of VVER units. First in the world, we upgraded a power unit to extend its service life and started copying this experience to foreign NPPs, he said.