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
- 학술저널
- 저자정보
- 발행연도
- 2016.1
- 수록면
- 182 - 188 (7page)
이용수
초록· 키워드
오류제보하기
Significant piping wall thinning caused by Flow-Accelerated Corrosion (FAC) and Erosion-Corrosion (EC)continues to occur, even after the Mihama Power Station unit 3 secondary pipe rupture in 2004, in whichworkers were seriously injured or died. Nuclear power plants in many countries have experienced FACand EC-related cases in steam cycle piping systems. Korea has also experienced piping wall thinning casesincluding thinning in the downstream straight pipe of a check valve in a feedwater pump line, the downstreamelbow of a control valve in a feedwater flow control line, and failure of the straight pipe downstreamof an orifice in an auxiliary steam return line. Cause analyses were performed by reviewing thickness datausing Ultrasonic Techniques (UT) and, Scanning Electron Microscope (SEM) images for the failed pipe,and numerical simulation results for FAC and EC cases in Korea Nuclear Power Plants. It was concludedthat the main cause of wall thinning for the downstream pipe of a check valve is FAC caused by watervortex flow due to the internal flow shape of a check valve, the main cause of wall thinning for the downstreamelbow of a control valve is FAC caused by a thickness difference with the upstream pipe, and the maincause of wall thinning for the downstream pipe of an orifice is FAC and EC caused by liquid dropletsand vortex flow. In order to investigate more cases, additional analyses were performed with the reviewof a lot of thickness data for inspected pipes. The results showed that pipe wall thinning was also affectedby the operating condition of upstream equipment. Management of FAC and EC based on these cases willfocus on the downstream piping of abnormal or unusual operated equipment.
목차
등록된 정보가 없습니다.
참고문헌 (5)
참고문헌 신청
2010 / Mentoring Guide for Flow-Accelerated Corrosion Engineers
S. K. Park / 2013 / Proceedings of the CSSK Annual Fall Meeting on A study on the wall thinning pipe at valve downstream :45
Y. S. Lee / 2014 / Proceedings of the CSSK Annual Spring Meeting on Cause analysis for abnormal wall thinning at a feedwater elbow of NPPs :30
황경모 / 2013 / 주증기계통 오리피스 후단 소구경 배관의 감육 및 누설 발생 / CORROSION SCIENCE AND TECHNOLOGY 12(5):227~232
Y. S. Lee / 2013 / Proceedings of the CSSK Annual Fall Meetings on Study of wall thinning experiences for carbon steel pipes at NPP steam cycle systems :53
S. K. Park / 2013 / Proceedings of the CSSK Annual Fall Meeting on A study on the wall thinning pipe at valve downstream :45
Y. S. Lee / 2014 / Proceedings of the CSSK Annual Spring Meeting on Cause analysis for abnormal wall thinning at a feedwater elbow of NPPs :30
황경모 / 2013 / 주증기계통 오리피스 후단 소구경 배관의 감육 및 누설 발생 / CORROSION SCIENCE AND TECHNOLOGY 12(5):227~232
Y. S. Lee / 2013 / Proceedings of the CSSK Annual Fall Meetings on Study of wall thinning experiences for carbon steel pipes at NPP steam cycle systems :53
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