Berezovskaya GRES started a large-scale repair campaign which will involve all power units of the power plant. It includes scheduled repairs of Units No. 3 and No. 2, as well as major overhaul of Unit No. 1.
Repairs at Power Unit No. 3 started on 1 March. It includes a standard scope of work, such as inspection and fault detection of the main and auxiliary equipment, elimination of defects, and replacement of worn-out parts. The exception is work at the turbine generator, where an above-standard repair will be carried out with the rotor taken out for a comprehensive diagnostic inspection. Completion of the repairs is scheduled for 5 May.
On 7 May, Power Unit No. 2 will be removed out of service for scheduled repairs. The following standard works are scheduled: cleaning of convection heating surfaces and furnace of the boiler unit, repair of the boiler, turbine, electrical and instrumentation equipment, metal preparation and inspection as part of the program to improve the reliability of heating surfaces of boiler P-67. The unit will be shut down till 16 July.
The final stage will be the overhaul of Power Unit No. 1, which is combined with the implementation of three major retooling and modernization projects. The thyristor excitation system of the turbine generator will be upgraded; the hot reheat pipelines will be replaced (293 tons); the project to replace the convention reheater will be continued (344 tons).
The list of main tasks includes overhaul of K-800-240-5 turbine and auxiliary equipment; opening of HPC (high pressure cylinder), IPC (intermediate pressure cylinder), LPC-1,2,3 (low pressure cylinders); works to control the condition of metal, elements of turbine unit for extension of operating life. It is planned to carry out industrial safety expertise of Group A high pressure heaters. In addition, large-scale repair of boiler P-67 and auxiliary equipment will be conducted. The overhaul will be performed from 16 July to 14 November.
More than 500 specialists of contractors and own staff will be involved in the work.