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Eddy current testing of type-439 stainless steel tubing using magnetic saturation technique

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Abstract

The type-439 ferritic stainless steel tubing is typically used for a moisture separator reheater (MSR) in a nuclear power plant turbine system. MSR employ heavier wall tubing than that of other reheaters. Generally, service-induced damage can occur on the outside diameter surface of the type-439 ferritic stainless steel tubing, and the most typical damage mechanism is the vibration-induced tube-to-tube support plate (TSP) wear and the fatigue cracking. In this study, the optimized magnetic flux density of an eddy current probe for the inspection of type-439 stainless steel tubing has been analyzed, and a specific magnetic saturation probe was designed. We have successfully evaluated the capability of the magnetic saturation eddy current technique to detect and measure flaws in the type-439 stainless steel tubing of moisture separator reheater.

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References

  1. EPRI, Electromagnetic NDE guide for balance-of-plant heat exchangers, Rev. 2, TR-101772-R2, 3.2-21, 4.0-29~4.0-33 (1997).

  2. American Society for Metals, NDE and quality control, ASM Handbook, 17 (1997) 181–183.

  3. H. J. Lee, M. W. Nam and Y. S. Kim, Development of NDE technology for RCCA in PWR, TM0097001, Korea Electric Power Research Institute (1997).

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Authors and Affiliations

  1. KHNP Central Research Institute, 25-1, Jang-Dong, Yuseong-Gu, Daejeon, 305-343, Korea

    Hee Jong Lee, Chan Hee Cho, Min Woo Nam & Hyun Ju Yoo

  2. School of Mechanical Engineering, College of Engineering, Yeungnam University, 214-1 Dae-dong, Gyeongsan, 712-749, Korea

    Sung-Yull Hong

Authors
  1. Hee Jong Lee
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  2. Chan Hee Cho
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  3. Min Woo Nam
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  4. Hyun Ju Yoo
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  5. Sung-Yull Hong
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Corresponding author

Correspondence to Sung-Yull Hong.

Additional information

Recommended by Guest Editor Dong-Ho Bae

H. J. Lee is a Chief Researcher at KHNP Central Research Institute, responsible for NDE R&D. Since 1993, he has been involved in the NDE R&D section, field application of NDE technology for the past 18 years. In 2006, he was awarded for his contributions by the Ministry of Knowledge Economy (MKE).

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Lee, H.J., Cho, C.H., Nam, M.W. et al. Eddy current testing of type-439 stainless steel tubing using magnetic saturation technique. J Mech Sci Technol 26, 2081–2085 (2012). https://doi.org/10.1007/s12206-012-0519-z

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  • DOI: https://doi.org/10.1007/s12206-012-0519-z

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