Abstract
This paper is devoted to issues of creating the reactors that ensure high efficiency of natural raw use for fuel materials of reactors, possibility to enhance the pace of atomic energy development in the nearest future. Methods and stages for achieving these goals are shown including the example of work of the staff of NNC RK. Technical solutions used at the initial stage, are based on reduction of neutron losses in thermal reactors, use of 233U as fission material. The solution of the problem of nuclide activity reduction in 232U chain lead to possibility to increase fission proportions on fast neutrons in the fuel of thermal reactor. Created advanced type of fast thermal reactor ensures increasing of fission proportion on fast neutrons up to 30%, at small amount of fission materials typical for thermal reactor.