In accordance with the approved schedule, the Branch planned to carry out intermediate maintenance of CCGT-400 Power Units N 1 and 3, and current repairs of Power Units N 2, 4, 5, 6 and 7 in 2022. Currently, the repair of the turbine unit (including turbine diagnostics) of Power Unit No. 1 is nearing completion. The turbine cutoff valve has been replaced. In regard to the boiler equipment of the Power Unit, the plant’s specialists completed the repair of boilers, and replacement of the bends of steam supply pipes, the air preheater cubes and the exhausters’ impellers.
The repair of Power Unit No. 3 starts on August 29. The following activities are scheduled: turbine diagnostics, auxiliary equipment repair, and expert assessment of industrial safety of the boiler, steam supply pipes and reheater pipelines.
Current repairs of turbine and boiler equipment of Power Units Nos. 2 and 5 have already been completed. Standard current repairs of the main and auxiliary equipment are virtually completed at the Power Unit No. 6. Repair of CCGT-400 Power Unit No. 4 will start in August, and Power Unit No. 7 – in late September.
The maintenance campaign in ongoing in the city’s heat power network as well. The plan provides for replacement of about 3.7 km of pipelines, and for repair of thermal insulation of pipelines with the total length of about 800 linear metres before the start of the heating season.
It should also be noted that the maintenance campaign at Shaturskaya GRES is running on schedule. The purpose of this campaign is to improve reliability and efficiency of the equipment, and ensure that Shaturskaya GRES is ready to take up the load for the winter season.