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September 7, 2009

On the progress of restoration work at the Sayano-Shushenskaya HPP as of 18.00 hours on 7 September, 2009

Since the restoration work at the Sayano-Shushenskaya HPP was launched, 7500 cubic metres of metal and ferro-concrete structures have been cleared. Work is under way to restore the sewerage system in the HPP building and the heating system for the administrative technological building and steps are being taken to dismantle the 500 KW overhead crossing cables of blocks T4 and T5. 

Work goes on to reconnect the electricity supply to the facility (transformers T-89 and T-94 are now live) and to restore the electric power supply connections for the HPP's own needs. 

Over 2060 people are currently involved in the accident and restoration work at the Sayano-Shushenskaya HPP, plus 57 pieces of equipment.

Within the framework of preparations for the winter, the thermal contour for the turbine room of the Sayano-Shushenskaya HPP is being installed.  The plan is to complete this work by 11 November, 2009.

The rotor of hydro-generator 9 is being disassembled and hydro-generator 7 dismantled; work to identify defects and restore hydro-generator 6, hydro-generator 5 and hydro-generator 4 is in progress.  Installation of the metal structures of the support column in the turbine room near hydro-generator 2 has been completed and concrete is being laid.  Pump stations (artesian, drainage and sewage) have been started up, as has the hot water supply.  The smoke-removal system is also now in operation in the installation site block.  Preparations are under way to create additional entry routes to the construction zone of the turbine room of the right bank.

The inflow of water to the dam of the Sayano-Shushenskaya HPP is 2450 cubic metres per second, and the water is released through the spillway at a rate of 3055 cubic metres per second.  The level of the upper pool 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 537.09 metres (the normal level being 539 metres).  The level of the lower pool is 324.73 metres.

At the Mainskaya HPP, hydro-units 1, 2 and 3, with an aggregate capacity of 191 MW, are in operation, the upper pool level being 323.52 metres and with 4 of the spillway gates opened.

Constant control is being exercised over the state of the water in the Yenisei River.




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