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http://dx.doi.org/10.3795/KSME-A.2008.32.8.660

Evaluation of Thermal Stratification and Primary Water Environment Effects on Fatigue Life of Austenitic Piping  

Choi, Shin-Beom (성균관대학교 기계공학부)
Woo, Seung-Wan (성균관대학교 기계공학부)
Chang, Yoon-Suk (성균관대학교 기계공학부)
Choi, Jae-Boong (성균관대학교 기계공학부)
Kim, Young-Jin (성균관대학교 기계공학부)
Lee, Jin-Ho (한국원자력안전기술원 기계해석실)
Chung, Hae-Dong (한국원자력안전기술원 기계해석실)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.32, no.8, 2008 , pp. 660-667 More about this Journal
Abstract
During the last two decades, lots of efforts have been devoted to resolve thermal stratification phenomenon and primary water environment issues. While several effective methods were proposed especially in related to thermally stratified flow analyses and corrosive material resistance experiments, however, lack of details on specific stress and fatigue evaluation make it difficult to quantify structural behaviors. In the present work, effects of the thermal stratification and primary water are numerically examined from a structural integrity point of view. First, a representative austenitic nuclear piping is selected and its stress components at critical locations are calculated in use of four stratified temperature inputs and eight transient conditions. Subsequently, both metal and environmental fatigue usage factors of the piping are determined by manipulating the stress components in accordance with NUREG/CR-5704 as well as ASME B&PV Codes. Key findings from the fatigue evaluation with applicability of pipe and three-dimensional solid finite elements are fully discussed and a recommendation for realistic evaluation is suggested.
Keywords
Environmental Fatigue; Global Stress Analysis; Local Stress Analysis; Metal Fatigue; Thermal Stratification;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By SCOPUS : 0
연도 인용수 순위
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