Development and Strength Evaluation of Material for Thermal Striping in Sodium

Abstract

In order to develop a material for thermal striping in sodium, cold rolling materials with slits were manufactured, and thermal striping tests in sodium and stress analyses were conducted. Decrease of surface cracks was confirmed, because the stress was decreased by slits, and the materials strength was increased by cold rolling. The effect of stress decrease was evaluated by finite element method. By decreasing slit interval, the stress in the plane center and slit tip decreased to about 35% and 10%, respectively. The prospect of application of the materials to FBR was obtained.