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[[File:BN-800 construction.jpg|thumb|Construction of the BN-800 reactor]]
Construction started on the larger BN-800 fast breeder reactor in 1987. Protests halted progress in 1988, but work resumed in 1992 following an order by President [[Boris Yeltsin]]. Financial difficulties resulted in slow progress. Construction costs have been estimated at 1 trillion [[Russian ruble|rubles]] and the new reactor was expected to be finished in 2012–2015
On 27 June 2014, controlled nuclear fission started in the BN-800 fast breeder reactor. The newest reactor helps to close the nuclear fuel cycle and to achieve a fuel cycle without or with less nuclear waste. Russia was, at the date, the only country that operates fast neutron reactors for energy production.<ref>{{cite web
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