Journal of the Korean Society for Nondestructive Testing (비파괴검사학회지)

The Korean Society for Nondestructive Testing (한국비파괴검사학회)
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Defect Detection of the Wall Thinning Pipe of the Nuclear Power Plant Using Infrared Thermography

적외선열화상을 이용한 원자력발전소 감육 배관의 결함 검출

  • 김경석 (조선대학교 기계설계공학과) ;
  • 장호섭 (조선대학교 레이저센터) ;
  • 홍동표 (전북대학교 기계시스템공학부) ;
  • 박찬주 (조선대학교 대학원 첨단부품소재공학과) ;
  • 나성원 (조선대학교 대학원 첨단부품소재공학과) ;
  • 김경수 (조선대학교 대학원 첨단부품소재공학과) ;
  • 정현철 (조선대학교 기계설계공학과)
  • Received : 2009.09.02
  • Accepted : 2010.04.16
  • Published : 2010.04.30
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Abstract

The infrared energy is emitted in the infrared wavelength range that corresponds to the surface temperature of a object which has temperature that is over the absolute the temperature(OK). The infrared thermography (IRT) is a non-destrnctive testing method that provides thermal video for the user in real-time by converting the infrared quantity that is detected by the infrared detector into temperature. The pipes of nuclear power plant(NPP) could be thinned by the corrosion and fatigue and the defect could lead to a big accident. For this reason, the effective non-destructive testing method is necessary. In this study, the relationship between the measured temperature and the defect depth or size of NPP pipes were recognized and that was applied to detect the wall thinning defects of NPP pipes.

절대온도(OK) 이상의 온도를 가지고 물체는 표면온도에 대응하는 적외선 파장대역에서 적외선 에너지를 방출하게 된다. 적외선열화상은 적외선 파장대역에 반응하는 검출기를 이용하여 검출된 적외선 량을 온도로 변환하고 사용자에게 적외선영상을 실시간으로 제공하는 비파괴검사 방법이다 원자력발전소의 배관은 부식, 피로 등으로 인해 두께가 얇아져 큰 사고로 이어질 수 있는 결함이 발생하므로 이를 위한 효율적인 비파괴검사 시스템이 요구되고 있다. 따라서 본 연구에서는 적외선열화상 카메라로 측정한 온도와 배관의 결함 깊이 및 크기와의 상관관계를 알아보고 이를 원자력발전소 배관에 적용하여 결함을 검출하는 연구를 수행하였다.

Keywords

Acknowledgement

Supported by : 조선대학교

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