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On the progress of restoration work at the Sayano-Shushenskaya HPP as of 12.00 hours on 2 September, 2009

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


At this time 1750 people and 48 pieces of equipment are currently involved, round the clock, in restoration work.


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 2405 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 for the operating mode.  The level of the headrace is 537.34 metres (the normal level being 539 metres).  The level of the tailrace is 324.50 metres. The level of the headrace is 537.45 metres and that of the tailrace is 324.46 metres. The level of the water in the building of the Sayano-Shushenskaya HPP is at the 304.64 mark.  Pumping out of water is going on.


At the Mainskaya HPP, hydro-units 1, 2 and 3, with an aggregate capacity of 198 MW, are in operation, the headrace level being 323.45 metres and 4 of the spillway gates being opened.


Clearing of debris is continuing at the 310.00÷327.00 levels of the Sayano-Shushenskaya HPP, works are going on to repair the remaining roof of the turbine room and install metal structures.  An agreement has been concluded with the company Stalkonstruktsia (Krasnoyarsk) to supply metal structures for repairing the façade and roof in order to complete the work on creating the thermal contour of the turbine room by 15 October.


The rotor of hydro-generator 9 is being disassembled, as is hydro-generator 7, while work is going on to identify defects in equipment and restore the support column of the turbine room in the vicinity of hydro-generator 2.


Direct current cable No. 2 is under inspection in the turbine room and the 0.4 KW Н17 own needs board has been connected.  Connections have been prepared for the 6-KW outdoor switchgear (RT-21 and RT-23) to feed the 6 KW busbars.  Two 35/6 KW substations with a capacity of 10 MW and 3.125 MW have been installed and connected up for supplying the HPP’s own power supply needs.


Water has been brought up to hydro-generator 8 at the 320.00 mark for the fire-extinguishing system for the turbine room.


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