The former general director of the plant, Alexander Toloshinov, has said that the accident was most likely due to a "manufacturing defect" in a turbine.[16] According to Toloshinov, the construction of the turbine blades of this type of turbine is not very reliable and cracks are known to develop in them under some working conditions.[17]
On 11 September 2009, RusHydro refuted allegations that the dam overwhelmed the machinery hall leading to the destruction of turbine 2. According to RusHydro, displacements of the dam are seasonal and have been reduced in recent years. The maximum displacement (141.5 millimetres or 5.57 inches) was recorded in 2006, which was below the allowed maximum of 145.5 mm (5.73 in). According to RusHydro, the scope of displacement between the anchor legs and the machinery hall does not exceed 2.3 mm (0.091 in), which is less than the width between them (50 mm or 2.0 in), and therefore the dam cannot overwhelm the machinery hall.[18]
On 21 August 2009, a website supporting rebel groups in Chechnya claimed that they were responsible for the blast, part of a new "economic war" which they were declaring on Russia. These claims were dismissed by authorities as "idiotic
The former general director of the plant, Alexander Toloshinov, has said that the accident was most likely due to a "manufacturing defect" in a turbine.[16] According to Toloshinov, the construction of the turbine blades of this type of turbine is not very reliable and cracks are known to develop in them under some working conditions.[17]On 11 September 2009, RusHydro refuted allegations that the dam overwhelmed the machinery hall leading to the destruction of turbine 2. According to RusHydro, displacements of the dam are seasonal and have been reduced in recent years. The maximum displacement (141.5 millimetres or 5.57 inches) was recorded in 2006, which was below the allowed maximum of 145.5 mm (5.73 in). According to RusHydro, the scope of displacement between the anchor legs and the machinery hall does not exceed 2.3 mm (0.091 in), which is less than the width between them (50 mm or 2.0 in), and therefore the dam cannot overwhelm the machinery hall.[18]On 21 August 2009, a website supporting rebel groups in Chechnya claimed that they were responsible for the blast, part of a new "economic war" which they were declaring on Russia. These claims were dismissed by authorities as "idiotic
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