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학술저널
저자정보
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제46권 제2호
발행연도
2014.1
수록면
225 - 234 (10page)

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Wall-thinned defects caused by accelerated corrosion due to fluid flow in the inner pipe appear in many structures of thesecondary systems in nuclear power plants (NPPs) and are a major factor in degrading the integrity of pipes. Wall-thinneddefects need to be managed not only when the NPP is under maintenance but also when the NPP is in normal operation. Tothis end, a test technique was developed in this study to detect such wall-thinned defects based on the temperature differenceon the surface of a hot pipe using infrared (IR) thermography and a cooling device. Finite element analysis (FEA) wasconducted to examine the tendency and experimental conditions for the cooling experiment. Based on the FEA results, theequipment was configured before the cooling experiment was conducted. The IR camera was then used to detect defects in theinner pipe of the pipe specimen that had artificially induced defects. The IR thermography developed in this study is expectedto help resolve the issues related to the limitations of non-destructive inspection techniques that are currently conducted forNPP secondary systems and is expected to be very useful on the NPPs site.

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