Macroscopic high temperature structural analysis of PHE prototypes considering weld material properties

A process heat exchanger (PHE) in a nuclear hydrogen system is a key component that transfers the large amount of heat generated in a very high temperature reactor (VHTR) to a chemical reaction that yields a large quantity of hydrogen. A performance test on a small scale and a medium scale PHE prototype made of Hastelloy'R'-X is being conducted on in a small scale nitrogen gas loop at the Korea Atomic Energy Research Institute. Previous research on the macroscopic high temperature structural analysis of PHE prototypes had been performed using base material properties owing to a lack of weld material properties. In this study, macroscopic high temperature structural analyses considering the weld material properties were performed and the results were compared with those of a previous study