Modernisation of rotor hydraulic lift pump of steam turbine unit K-1200-6.8/50

Equipment of foreign manufacturers was widely used in the Russian industry in the recent past.
At the same time technical support for the operation of such complex equipment is currently significantly hampered or non-existent under the pressure of sanctions and system restrictions imposed on Russia. The Novovoronezh NPP staff is confronting successfully such challenges by developing technical solutions that enable the continued efficient operation of imported equipment under the new reality. One of the many examples of the efforts of the Novovoronezh NPP staff to ensure Russia's economic safety and technological sovereignty is given in this article. During operation of power units with VVER-1200 reactors, failures in operation of turbine unit rotor hydraulic lift pumps of Allweiler GmbH (Germany) were identified. As part of the programme of import substitution and improvement of equipment reliability on the basis of available documentation and comparative analysis of operation modes of turbine unit rotor hydraulic lift pumps pumps at Novovoronezh and Leningrad NPPs, the technology of turbine unit rotor hydraulic lift pumps repair with modernisation of internals by means of installation of bronze bushing and observance of precise clearances of pump internals is developed. Improved circuit solutions for the system of hydrostatic lifting of rotors are proposed which exclude damage to the turbine unit rotor hydraulic lift pumps during operation of the power unit at capacity and during scheduled preventive maintenance. The modernisation of equipment manufactured in Germany and its successful operation at Novovoronezh NPP is a vivid example of a scientifically sound technical response to the sanctions pressure of foreign countries and can be extended to other Russian enterprises as a positive practice.