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원자로 In-Core Flux Thimble 결함의 와전류 탐상 기술 개발
박광희,임창재,장윤영,박승식 한국비파괴검사학회 1990 한국비파괴검사학회지 Vol.10 No.2
Since in-core flux thimble tube wear the due to flow-induced vibration could degrade the integrity of nuclear reactor, the effective detection and interpretation of the wear is important. In order to establish an inspection technique for thimble tubes, an eddy current experiment was performed to determine the optimum test frequency, defect sensitivity and evaluation accuracy. Eddy current probes were designed and fabricated with a theory. Specimens with artificial defects were fabricated using electro discharge machining method. The results from inspection technique developed and on-site inspection showed good applicability.