The Sayano-Shushenskaya hydropower plant's accident was caused by faults in its exploitation and maintenance and failure of its safety system, head of the Russian Federal Service of Environmental, Technological and Nuclear Supervision (Rostekhnadzor) Nikolai Kutyin has said according to Itar-Tass.
The service head believes it is necessary to work out a new project at the HPP site, Prime-Tass quoted Kutyin.