Investigation of ageing of fast neutron reactor pipelines after long-term operation

The purpose of this work is the substantiation of efficiency of austenitic pipelines metal of fast neutron reactor for overdesigned 15-years of operation. Since the main damaging factor for this type of NPPs is the high temperature and stress, in the frames of this work there were conducted comprehensive laboratory investigations of metal pipelines ageing in condition of modeling of long thermo-force ageing and creep, also developed and implemented in practice the methodic of full-scale monitoring of creep by use long-term hardness method. (author)