31.08.2009
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On the progress of restoration work at the Sayano-Shushenskaya HPP as of 18.00 hours on 31 August, 2009

The repair and restoration work at the Sayano-Shushenskaya HPP is proceeding according to plan.

Over 1520 people and 57 pieces of equipment are currently involved, round the clock, in restoration work at the Sayano-Shushenskaya HPP.

The inflow of water to the dam of the HPP is 2700 cubic metres per second, and the water is released through the spillway at a rate of 2665 cubic metres per second.   The level of the headrace and the release of water through the hydro-engineering structures of the power station comply with the water release regime recommended by the Water Administration of the Angaro-Yenisei Basin, adjusted in the operating mode.  The level of the upper pool is 537.45 metres (the normal level being 539 metres).  The level of the lower pool is 324.33 metres.

The level of the water in the building of the Sayano-Shushenskaya HPP is at the 304.46 mark.  The total volume of water pumped out amounts to 680 cubic metres and hour.  Two drainage pumps are operating at the 305.75 mark, plus one centrifugal pump.  Two pumps are working to dry out the wet gallery.  Oil collection is a continuous process.

Work is continuing on creating a thermal contour of the repair zone in the turbine room and clearing debris at the 327.00│─310.00 levels.  The equipment and premises of the HPP building are undergoing a detailed inspection.  The transformer site has been cleared of debris.  Damaged transformer 1└S has been pulled out and set up in the workshop.  The remains of the support column in the area of hydro-generator 3 have been cleared away and preparations are under way for installing a new one.  Work is in progress to restore hydro-generators 5 and 6, as well as the support column in the turbine room near hydro-generator 2.  The metal structures in the turbine room are being dismantled and walls raised.  Electric lighting has been restored at the 327.00 mark of switchgear and control gear R1-R10 and at the 320.00 level of T-4.  The off-switches of switchgear and control gear RT21 and R5 are being repaired.  Reserve substation RS-3 is now live.

The teams are allowed access to the work in accordance with the access control system and strict control is being exercised over observance of labour discipline.

 

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