Ivakhin S.V. National research nuclear university “MEPhI”IRT Research Reactor Burnup Calculation for the Analysis of Conversion to Low Enrichment Uranium Fuel 7/14/2012 2012 - #03 Fuel cycle and nuclear waste management Ivakhin S.V. Radaev A.I. Tikhomirov G.V. Shchurovskaya M.V.