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August 31, 2009

JSC RusHydro announces the most recent progress of restoration work at the Company’s Sayano-Shushenskaya HPP, as of 12:00 August 31st, 2009

More than 1,560 individuals are currently involved in accident and restoration work at JSC RusHydro’s (ticker symbol: HYDR, MICEX, RTS and LSE) Sayano-Shushenskaya HPP, including more than 357 RusHydro employees. In addition, 47 pieces of equipment are currently being used in operations.

Water inflow into the HPP’s dam is 2,700 cubic meters per second, and water is being released through the spillway at a rate of 1,430 cubic meters per second.  The level of the upper pool and the release of water through the power station’s hydro-engineering structures fully comply with the water release program recommended by the Angaro-Yenisei Basin Water Administration, adjusted for the operating mode.  At present, the level of the upper pool is 537.46 meters (compared with a normal level of 539 meters).  The level of the lower pool stands at 323.60 meters.

The water level in the HPP’s building is currently at the 304.62 mark.  The total volume of water pumped out of the building is 680 cubic meters per hour.  Two drainage pumps are operating at the 305.75 level, and an additional centrifugal pump is working.  Two pumps are at work drying out the wet gallery.  Oil collection is an ongoing process.

Work is continuing to create a thermal contour for the repair zone of the HPP’s turbine room and to clear debris at the 327.00÷310.00 levels.  A detailed inspection is currently being carried out on equipment, as well as the premises of the HPP building.   The transformer site has now been cleared of debris.  The damaged 1T transformer has been removed and is, at present, set up in the workshop.  The remains of the support column in the vicinity of hydro-generator 3 have been cleared away and preparations are under way to install a new support column.  Work is in progress to restore hydro-generators 5 and 6, as well as the support column that is located in the turbine room near hydro-generator 2. Metal structures in the turbine room are being dismantled and walls are being raised. 

Electric lighting has been restored at the 327.00 mark for the switchgear and control gears R1-R10, as well as at the 320.00 level of T-4.  The reserve substation RS-3 is now live.

Work teams are allowed access to the area in accordance with an established access control system, and the Company also exercises strict control over observing labor discipline.




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