• 검색어에 아래의 연산자를 사용하시면 더 정확한 검색결과를 얻을 수 있습니다.
  • 검색연산자
검색연산자 기능 검색시 예
() 우선순위가 가장 높은 연산자 예1) (나노 (기계 | machine))
공백 두 개의 검색어(식)을 모두 포함하고 있는 문서 검색 예1) (나노 기계)
예2) 나노 장영실
| 두 개의 검색어(식) 중 하나 이상 포함하고 있는 문서 검색 예1) (줄기세포 | 면역)
예2) 줄기세포 | 장영실
! NOT 이후에 있는 검색어가 포함된 문서는 제외 예1) (황금 !백금)
예2) !image
* 검색어의 *란에 0개 이상의 임의의 문자가 포함된 문서 검색 예) semi*
"" 따옴표 내의 구문과 완전히 일치하는 문서만 검색 예) "Transform and Quantization"
쳇봇 이모티콘
ScienceON 챗봇입니다.
궁금한 것은 저에게 물어봐주세요.

논문 상세정보


Check valve failure is one of the worst problems in nuclear power plants. Recently, many researches have been based on new technology using accelerometers and ultrasonic and magnetic flux detection have been carried out. Here, we have suggested a method that uses acoustic emission sensors for detecting the failures of check valves through measuring and analyzing backward leakage flow, a system that works without disassembling the check valve. For validating the suggested acoustic emission sensor methodology, we designed a hydraulic test loop with a check valve. We have assumed in this study that check valve failure is caused by disk wear or by the insertion of a foreign object. In addition, we have developed diagnostic algorithms by using a neural network model to identify the type and size of the failure in the check valve. Our results show that the proposed diagnostic algorithm with acoustic emission sensors is a good solution for identifying check valve failure without necessitating any disassembly work.

참고문헌 (11)

  1. H.D. Haynes, 'Aging and Service Wear of Check Valves Used in Engineering SafetyFeature Systems of Nuclear Power Plants,' NUREG/CR-4302, Vol. 1, 'Operating Experience and Failure Identification', Oak Ridge, TN, April (1991) 
  2. J.I. Braverman, et. a!., 'Assessment of AgeRelated Degradation of Structure and Passive Components for US Nuclear Power Plant, 'NUREG/CR-6679, BNL-NUREG52587, NRC, August (2000) 
  3. M.S. Kalsi at aI, 'Prediction of Check Valve Performance and Degradation in Nuclear Power Plant Systems - Wear and Impact Tests,' NUREG/CR-5583, US NRC, Washington DC, (1990) 
  4. B.P. Brooks, 'Application Guidelines for Check Valves in Nuclear Power Plant Systems,' EPRI NP-5479, EPRI, Palo Alto, CA, (1988) 
  5. W.M. Suslick, H.F. Parker and B.A. Mcdermott, 'Acoustic Emission Monitoring of Check Valve Performance,' Proceedings of the EPRI Power Plant Valves Symposium, Charlotte, NC, October 11-12, (1988) 
  6. H.D. Haynes, 'Evaluation of Check Valve Monitoring Methods,' Proceedings of the 17th Water Reactor Safety Meeting, October 23-25, Rockville, MD, (1989) 
  7. M.K. Yang, 'Acoustic and Ultrasonic Signals as Diagnostic Tools for Check Valves,' J. of Reactor Vessel Technology, Vol. 115, pp135-141, May, (1993) 
  8. C. Sim, H. Choi and H.K Baik, 'The Development of a Non-Intrusive Test of Check Valve Using Acoustic and Magnets,' J. of Acoustic Society of Korea, Vol. 16 No. 1E, (1997) 
  9. R.E. Uhrig and L.H. Tsoukalas, 'Application of Neural Networks', EPRI/TR-I03443-P1-2, Knoxville, TN, January (1994) 
  10. A.V. Oppenheim and R.W. Schafer, Digital Signal Processing, Prentice Hall Inc., NJ, (1998) 
  11. J.M. Zurada, Artificial Neural Systems, West Publishing Co. (1992) 

이 논문을 인용한 문헌 (0)

  1. 이 논문을 인용한 문헌 없음


원문 PDF 다운로드

  • ScienceON :

원문 URL 링크

원문 PDF 파일 및 링크정보가 존재하지 않을 경우 KISTI DDS 시스템에서 제공하는 원문복사서비스를 사용할 수 있습니다. (원문복사서비스 안내 바로 가기)

상세조회 0건 원문조회 0건

DOI 인용 스타일