Nondestructive Testing and Applications for Integrity Assessment of Power Plant Facilities by Acoustic Emission Technology - Part 1 : The Theory of Acoustic Emission Technology(I) -

발전설비 건전성평가를 위한 음향방출 비파괴검사 적용기술 - 제1편 : 음향방출 비파괴검사기술 이론(I) -

  • 이상국 (한전 전력연구원 원자력연구실)
  • Published : 2005.02.28

Abstract

Acoustic emission(AE) is defined as the transient elastic waves thar are generated by the rapid release of energy. The advantage of AE is that very early crack growth can be detected well before a highly stressed component may fail. At present, an exact diagnosis is the most reliable means for determining the soundness of structures during power plant operations. AE monitoring has been applied successfully in power plants to determine mechanical problems, pressure vessel integrity and external valves leaks, vacuum leaks, the onset of cavitation in pumps and valves, the presence of flow(or no flow) in piping and heat exchange equipment, etc. Acoustic emission(AE) technology has recently strengthened its application base, and practitioners' understanding of the technique's fundamentals. This paper introduces the methods of a survey and assessment on AE monitoring applications in nuclear, fossil and hydraulic power plant. The main objective of this paper was to obtain information on various applications of AE technology in power plant.

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