Abstract
A steam generator is a bundle of tubes which transfer the heat of reactor to the turbine through the reactor cooling system. In the reactor cooling system, the steam generator tube is subject to inner pressure at reactor part and outer pressure at turbine part. The outer pressure has been often disregarded in the burst test of the steam generator tube, thus results may deviate from the real service condition. In this study, the burst properties of the steam generator tube in the real service condition were estimated. From the study, the following conclusions were obtained; (1) the burst pressure increase as the outer pressure increased (2) from the ring tensile test and the burst test, the fracture criterion of steam generator tube was proposed.
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