抄録
Intermediate heat exchangers (IHXs) are structural components of the very high temperature gas-cooled reactor (VHTR) which transfer the heat generated in high-temperature core to the secondary circulation loop. In this paper, the properties of Alloy 617, one of the candidate alloys as structural material for IHXs, were evaluated by finite element analysis (FEA) based on ANSYS platform under creep-fatigue interaction conditions. Life prediction approach based on damage mechanics was combined with ANSYS structural analysis. Results of the life prediction and damage calculation of structural component by this method will provide guidance for structural and operational design of IHX. Preliminary comparison between calculation and FEA results indicates that this method is feasible, but many experiments have to be conducted in future because the creep-fatigue experimental results are scarce.
