Eddy Current Bobbin Probe Design for Steam Generator Tubes in NPPs

원전 증기발생기 전열관 와전류검사 보빈탐촉자 설계

  • 남민우 (한국전력공사 전력연구원) ;
  • 이희종 (한국전력공사 전력연구원) ;
  • 지동현 (한국전력공사 전력연구원) ;
  • 정지홍 (한국전력공사 전력연구원) ;
  • 김철기 (충남대학교 재료공학과)
  • Published : 2007.04.30


The bobbin probe examination is basic and the important method among other ECT techniques for the steam generator tube integrity assesment that is practiced during each plant outage. The bobbin probe is one of the essential components which consist of the whole ECT examination system, and provides us a decisive data for the evaluation of tube integrity in compliance with acceptance criteria described in specific procedures. The selection of examination probe is especially important because the quality of acquired ECT data is determined by the probe design characteristics, such as geometry and operation frequency, and has enormous effects on examination results. In this study, An optimal differential bobbin probe is designed for the steam generator tube inspection in nuclear power plants(NPPs). Based on the test results for electrical and ECT signal characteristics, the prototype bobbin probe satisfies all the criteria.


  1. ASNT, Nondestructive Testing Handbook. Vol. 4, Part 4, pp. 62, (1986)
  2. EPRI, Pressurized Water Reactor Steam Generator Examination Guidelines: Revision 6, pp 6-19, (2002)
  3. CGSB, Advanced Manual for : Eddy Current Test Method, pp. 74, (1986)
  4. Zetec Inc., Eddynet 98 Analysis User Guide, (2002)
  5. Zetec Inc., Eddynet 98 Acquisition Control Includes MIZ-70 & PM-3A User Guide, (2002)
  6. EPRI, Electromagnetic NDE Guide for Balance of-Plant heat Exchangers, Rev. 1, pp. 4-12, (1995)
  7. ASME Boiler and Pressure Vessel Code Sec. V, Article 8, pp. 165-169, (1995)
  8. ASME Boiler and Pressure Vessel Code Sec. XI App IV, pp. 303, (1995)
  9. EPRI, Eddy Current Data Quality Parameters for Inspection of Steam Generator Tubes, Vol. 1 : Bobbin Coil Probe, (2001)