In nuclear power plants, the structural components that are in contact with coolant are susceptible to thermal loads due to the change in the fluid temperature. If the heating and cooling processes are cyclic, the structure will endure thermal fatigue that may lead to failure. Thermal stratification is one of the main loads that can lead to high cycle thermal fatigue damage. The Japan Society of Mechanical Engineers, (JSME) have published the evaluation guideline for high cycle thermal fatigue. It treat...
英字タイトル:
Stress Generation Mechanism of Elbow Pipes Due to Thermal Stratification

In nuclear power plants, a lot of failure cases by high cycle thermal fatigue are reported, which is induced by temperature fluctuation of the coolant. To ensure the safety of nuclear power plants, thermal fatigue should be evaluated adequately. To evaluate thermal fatigue, frequency response functions were developed by Kasahara et al... These functions were derived theoretically to calculate thermal stress caused by thermal striping and thermal stratification oscillation, which are main causes of high...
英字タイトル:
Development of thermal stress evaluation method and fatigue damage evaluation method for thermal stratification oscillation

In nuclear power plants, a lot of failure cases by high cycle thermal fatigue have been reported, which is induced by temperature fluctuation of the coolant. To ensure the safety of the nuclear power plants, the thermal fatigue failure should be prevented adequately. Thus The Japan Society of Mechanical Engineers (JSME) published the high cycle thermal fatigue evaluation guideline. In the guideline, it is proposed that the structural integrity can be judged by the location of thermal stratification, which...
英字タイトル:
Study on the mechanism of stress generation of straight pipe and elbow pipe which has thermal stratification