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Electrical/Mechanical Diagnosis of Local Deterioration in 600V Shielded Twist Pair Cable in a Nuclear Power Plant

원전용 600V 차폐 꼬임쌍선 케이블의 국부열화에 대한 전기적/기계적 진단

  • Park, Myeongkoo (Dept. of Electronic and Computer Engineering, Sungkyunkwan University) ;
  • Kim, Kwangho (Dept. of Electronic and Computer Engineering, Sungkyunkwan University) ;
  • Lim, Chanwoo (Dept. of Mechanical Engineering, Ajou University) ;
  • Kim, TaeYoon (Dept. of Mechanical Engineering, Ajou University) ;
  • Kim, Hyunsu (Dept. of Mechanical Engineering, Ajou University) ;
  • Chai, Jangbom (Dept. of Mechanical Engineering, Ajou University) ;
  • Kim, Byungsung (Dept. of Electronic and Computer Engineering, Sungkyunkwan University) ;
  • Nah, Wansoo (Dept. of Electronic and Computer Engineering, Sungkyunkwan University)
  • Received : 2016.11.11
  • Accepted : 2016.12.01
  • Published : 2017.01.01

Abstract

In this paper, we propose a electrical/mechanical method to effectively diagnose the local deterioration of a 10m long power shielded twist pair cable defined by the American Wire Gauge (AWG) 14 specification using electrical/mechanical methods. The rapid deterioration of the cable proceeded by using the heating furnace, which is based on the Arrhenius equations proceeds from 0 to 35 years with the deteriorated equivalent model. In this paper, we introduce a method to diagnose the characteristics of locally deteriorated cable by using $S_{21}$ phase and frequency change rate measured by vector network analyzer which is the electrical diagnostic method. The measured $S_{21}$ phase and rate of change of frequency show a constant correlation with the number of years of locally deteriorated cable, thus it can be useful for diagnosing deteriorated cables. The change of modulus due to deterioration was measured by a modulus measuring device, which is defined by the ratio of deformation from the force externally applied to the cable, and the rate of modulus change also shows a constant correlation with the number of years of locally deteriorated cable. Finally, By combining the advantages of electrical/mechanical diagnostic methods, we can efficiently diagnose the local deterioration in the power shielded cable.

Keywords

References

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