Proceedings of the ... International Conference on Nuclear Engineering. Book of abstracts : ICONE
Online ISSN : 2424-2934
セッションID: ICONE19-43189
会議情報
ICONE19-43189 Thermal Fatigue Analysis for Pressurizer Surge Line Subjected to Thermal Stratification Using CFD Calculation Result
Dong-Gu KangMyung-Jo JhungKwang-Won Seul
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会議録・要旨集 フリー

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Fluid-Structure Interactions (FSIs) occurring inevitably in operating reactor component systems can cause excessive force or stress to the structures resulting in mechanical damages that may eventually threaten the structural integrity of components. In particular, thermal stratification in the pressurizer surge line has been addressed as one of the significant FSI phenomena in reactor systems. In this study, a thermal-stress simulation is performed using ANSYS FSI. The 3-dimensional transient temperature distributions in the wall of an actual PWR pressurizer surge line subjected to thermal stratification is calculated by CFD analysis either during out-surge or in-surge operation. The thermal loads from CFD analysis using ANSYS CFX are transferred to structural analysis code, ANSYS Multiphysics. From this information, thermal stresses are determined and ultimately a fatigue analysis is performed, all within the ANSYS environment. In addition, the thermal stress and fatigue analysis results obtained by applying the realistic temperature distributions from CFD analysis are compared with those by assuming the simplified temperature distributions to identify some requirements for a realistic and conservative thermal stress analysis from a safety point of view.
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© 2011 一般社団法人 日本機械学会
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