액체금속로 고온배관의 미국 및 프랑스 설계지침을 따른 크리프-피로 손상평가

In the present paper, the evaluation procedures of creep-fatigue damage for the high temperature piping system of the liquid metal reactor(LMR) according to the design guidelines of ASME section Ⅲ subsection NH of US and RCC-MR of France are presented. The assessment of design integrity for the secondary piping of KALIMER(Korea Advanced Liquid Metal Reactor) has been carried out, which showed the present design of the KALIMER secondary piping satisfied the allowable limits of the two design guidelines for the creep-fatigue damage. The creep load condition is the steady state(511℃) during 30 years design lifetime at the secondary piping circuit with plant capacity factor of 85%. The number of refueling during the design lifetime is 20. The differences in evaluation procedures of ASME-NH, RCC-MR RB-3600 for the primary piping and RC-3600 for the secondary piping are presented.