Journal of the Korean Society for Nondestructive Testing (비파괴검사학회지)

The Korean Society for Nondestructive Testing (한국비파괴검사학회)
권호 표지

Leak Evaluation for Power Plant Valve Using Multi-Measuring Method

  • Published : 2008.12.30
Download PDF
⟨ Previous Next ⟩

Abstract

Condition based maintenance(CBM) for the preventive diagnosis of important equipments related to safety or accident in power plant is essential by using the suitable methods based on actual power plant conditions. To improve the reliability and accuracy of the measured value at the minute leak situation, and also to monitor continuously internal leak condition of power plant valve, the development of a diagnosis and monitoring technique using multi-measuring method should be performed urgently. This study was conducted to estimate the feasibility of multi-measuring method using three different methods such as acoustic emission(AE) method, thermal image measurement and temperature difference$({\Delta}T)$ measurement that are applicable to internal leak diagnosis for the power plant valve. From the experimental results, it was suggested that the multi-measuring method could be an effective way to precisely diagnose and evaluate internal leak situation of valve.

Keywords

References

  1. Anon, (1986) Acoustic Emission for Detection of Leakage in Pipelines, Noise & Vibration Control World-wide, Vol. 17, No. 2, pp. 66-67
  2. Au-Yang, M. K. (1993) Acoustic and Ultrasonic Signals as Diagnostic Tools for Check Valves, Journal of Pressure Vessel Technology, Vol. 115, Issue 2, pp. 135-141 https://doi.org/10.1115/1.2929507
  3. Bently, P. G. (1981) A Review of Acoustic Emission for Pressurized Water Reactor Applications, NDT International, Vol. 14, Issue 6, pp. 329-335 https://doi.org/10.1016/0308-9126(81)90112-7
  4. Dimmick, Joseph G. et al., (1979) Shipboard, Water and Oil, High Performance Flowmeter Needs in the United States Navy, Naval Eng. Journal, No. 91, pp. 71-83 https://doi.org/10.1111/j.1559-3584.1979.tb03866.x
  5. Hong, Jaeil and Yoo, Juhyun, Lee Kabsoo, Lee Sangguk, and Song Hyunseon (2008) Characteristics of Acoustic Emission Sensor Using Lead-Free (LiNaK)(NaTaSb)O3 Ceramics for Fluid Leak Detection at Power Plant Valves, Japanese Journal of Applied Physics, Vol. 47, No. 4, pp. 2192-2194 https://doi.org/10.1143/JJAP.47.2192
  6. Pollock, A. A. and HSU, S. Y. S. (1982) Listening to Leaks, Noise & Vibration Control Worldwide, Vol. 13, No. 9, pp. 374-376
  7. Wichmann, H. and Phillips, D. (1984) Acoustic Emission Techniques for Locating Internal Leakage of Redundant Components, Journal of Spacecraft, Vol. 21, No. 1, pp. 36-40 https://doi.org/10.2514/3.8604
  8. Wood, B. R. A. and Harris, R. W. (1984) Pipeline Leak Detection with Acoustic Emission, AWR Doc., pp. 97-9-84