냉각수 배관 용접부 평가를 위한 유도초음파 기술의 적용

Application of Guided Ultrasonic Wave Technology for Evaluation of Welding Part in Cooling Water Pipe

  • 길두송 (전력연구원 원자력발전연구소) ;
  • 안연식 (전력연구원 원자력발전연구소) ;
  • 박상기 (전력연구원 원자력발전연구소)
  • 투고 : 2010.07.13
  • 심사 : 2010.09.24
  • 발행 : 2010.10.31

초록

The ultrasonic guided wave propagates along with the given structure's wall direction. Because of this specific character, the ultrasonic guided waves arc used in many other fields. Especially, it can be readily utilized for nondestructive inspection of various structures that are made up of gas pipes, heat exchanger tubes, and thin plates. Further, the guided wave technology can be readily utilized when inspecting pipes or thin plates which pose high risk of the accident but for which the nondestructive inspection itself is impossible because it is difficult to get to them since they are coated or buried underground. In the other hand, conventional ultrasonic testing such as thickness gauging uses bulk waves and only tests the region of structure immediately below the transducer. As a result of the application about inlet and outlet cooling water line using guided wave test, we conformed that the overall corrosions were in the lower side of the 304.8 mm inlet valve and these corrosions were engaged in not locally but through the lower side of the valve line. In the near future, we can expect that the detectable defect size is smaller than before along with the development of the sensing technology.

키워드

참고문헌

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