Kogan Isaak Ruvimovich Chief Technical Expert JSC «Atomenergoproekt» kogan_IR@aep.ruNPP operational reliability improvement based on the diversity principle 10/02/2017 2017 - #03 Global safety, reliability and diagnostics of nuclear power installations Andropov E.V. Kogan I.R. Povarov V.P. Pavlov L.P.