Transactions of the Korean Society of Pressure Vessels and Piping (한국압력기기공학회 논문집)

Korean Society of Pressure Vessels and Piping (한국압력기기공학회)
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Guided Wave Characterization Assessment for PWSCC Detection of Pressurizer Heater Sleeve Weld

가압기 히터슬리브 용접부 PWSCC 검출을 위한 유도초음파 특성 평가

  • 주경문 (한국수력원자력(주) 원자력발전기술원) ;
  • 문용식 (한국수력원자력(주) 원자력발전기술원) ;
  • 정우근 (한국수력원자력(주) 원자력발전기술원)
  • Received : 2011.03.22
  • Accepted : 2011.04.30
  • Published : 2011.06.01
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Abstract

Although many defects in PZR heater sleeve have been reported continually from operating experiences in oversea nuclear power plant, utilities get into difficulties in finding appropriate methods for diagnostics of the components due to the limited access or high radiation problems. Recently, as an alternative, diagnostics using Guided Wave Testing(GWT) are proposed and the attention of the methods has been growing gradually because of their long range inspection capability. This study is to investigate the effectiveness of GWT to detect PWSCC in welding points of PZR heater sleeve. Moreover, mode sensitivity analysis of GWT and optimal frequency for the diagnostics of PWSCC are presented by testing the mock-ups specimens that contain artificial flaws.

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