지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 김원태
- 발행연도
- 2021
- 저작권
- 공주대학교 논문은 저작권에 의해 보호받습니다.
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이 논문의 연구 히스토리 (4)
2020
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초록· 키워드
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The nuclear power plant building is a very important structure as the last bastion to prevent radiation leakage to the outside in the event of a nuclear accident. Recently, concrete voids and CLP wall thinning defects have been discovered in domestic and overseas nuclear power plants, raising the issue of nuclear power plant safety, and interest in non-destructive inspection of nuclear power plants is increasing. Currently, the inspection methods used for inspection of nuclear power plants include acoustic emission test(AE), ultrasonic test(UT), visual test(VT), and comprehensive leakage rate test, but the inspection area is narrow, and the inspection time is long or the accuracy is poor. Therefore, the need to develop new non-destructive testing technology has increased.
Therefore, in this study, a study on the detection of CLP thinning defects was conducted through the development and experiment of FEA modeler for CLP thinning defects by applying Eddy Current Thergmoraphy (ECT) among infrared thermography non-destructive testing. In the eddy current thermography, simulations and experiments were performed for the excitation frequency of 60 kHz and the currents of 100 A and 200 A. In addition, static eddy current thermal imaging and dynamic eddy current thermal imaging were used, and defect detection experiments were performed using line scanning method (LSM) for dynamic eddy current thermography. For defects of different depths and sizes, current flow and current density in the defect area were analyzed through simulation, and temperature data analysis and image processing of the defect area and the sound area were performed through experiments.
Therefore, in this study, a study on the detection of CLP thinning defects was conducted through the development and experiment of FEA modeler for CLP thinning defects by applying Eddy Current Thergmoraphy (ECT) among infrared thermography non-destructive testing. In the eddy current thermography, simulations and experiments were performed for the excitation frequency of 60 kHz and the currents of 100 A and 200 A. In addition, static eddy current thermal imaging and dynamic eddy current thermal imaging were used, and defect detection experiments were performed using line scanning method (LSM) for dynamic eddy current thermography. For defects of different depths and sizes, current flow and current density in the defect area were analyzed through simulation, and temperature data analysis and image processing of the defect area and the sound area were performed through experiments.
목차
I. 서론 11.1 연구 배경 11.2 국내외 연구현황 21.3 연구 목적 41.4 연구 계획 4II. 이론적 배경 52.1 적외선열화상의 개요 52.2 적외선열화상 측정 원리 72.2.1 적외선열화상 카메라의 원리 72.2.2 적외선열화상 원리 92.3 적외선열화상 기술의 분류 132.3.1 수동 열화상(Passive thermography) 132.3.2 능동 열화상(Active thermography) 13III. 실험장치 및 방법 163.1 와전류열화상(ECT) 163.1.1 개요 163.1.2 이론 183.2 라인 스캐닝 기법(LSM) 233.3 특이값 분해(SVD) 253.4 실험장치 및 구성 273.4.1 시험편 273.4.2 실험장비 및 설정 303.5 유한요소해석(FEA) 313.5.1 모델링 313.5.2 시뮬레이션 조건 34IV. 결과 및 고찰 374.1 시뮬레이션 결과 384.2 실험 결과 44V. 결론 515.1 향후 연구 계획 525.1.1 가장자리 과열 이미지 처리 연구 525.1.2 콘크리트 공극 결함 검출 연구 52참고문헌 53Abstract 59
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