Abstract
This paper describes Thermal Stress concentration on tube sheet structures in Fast Breeder Reactor (FBR). Especially, the stress riser exists in the part with the complex structure, and it is important in the heat exchanger to know the thermal stress of the location in the design in detail. These objects are SUS304 perforated plates having different position. We calculated the Stress by FEM Analysis and measured the crack growth by a fatigue test under the elevated temperature.
