Applications of joint time-frequency domain reflectometry for health assessment of cable insulation integrity in nuclear power plants

David Coats, Jingjiang Wang, Yong June Shin, Roger A. Dougal, Thomas Koshy

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Defective cables in the electric power systems of nuclear power plants can cause failure of essential components in control and instrumentation or power distribution subsystems, resulting in potential safety concerns. Due to this problem, a nondestructive and non-intrusive condition assessment technique is highly desirable to evaluate cable status and to predict the remaining useful life of a cable. The capability of joint time-frequency domain reflectometry (JTFDR) as such a condition assessment technique is studied in this paper. The health status of four popular insulation types utilized in nuclear power plants for control and distribution is monitored using JTFDR in thermal accelerated aging test including: Cross-linked polyethylene (XLPE), tree retardant cross-linked polyethylene (TR-XLPE), ethylene propylene rubber (EPR), and silicone rubber (SIR). The experimental results show that JTFDR can successfully monitor the aging process of all four insulation types. Further, the results from JTFDR are compared with the results from Elongation-at-Break (EAB). These results show that JTFDR technique is comparable with EAB, in some cases providing more linear characteristics with respect to aging time, and has great potential as a non-destructive and non-intrusive condition assessment technique.

Original languageEnglish
Title of host publication7th International Topical Meeting on Nuclear Plant Instrumentation, Control, and Human-Machine Interface Technologies 2010, NPIC and HMIT 2010
Pages2032-2038
Number of pages7
Publication statusPublished - 2010 Dec 1
Event7th International Topical Meeting on Nuclear Plant Instrumentation, Control, and Human-Machine Interface Technologies 2010, NPIC and HMIT 2010 - Las Vegas, NV, United States
Duration: 2010 Nov 72010 Nov 11

Publication series

Name7th International Topical Meeting on Nuclear Plant Instrumentation, Control, and Human-Machine Interface Technologies 2010, NPIC and HMIT 2010
Volume3

Other

Other7th International Topical Meeting on Nuclear Plant Instrumentation, Control, and Human-Machine Interface Technologies 2010, NPIC and HMIT 2010
CountryUnited States
CityLas Vegas, NV
Period10/11/710/11/11

All Science Journal Classification (ASJC) codes

  • Human-Computer Interaction
  • Nuclear Energy and Engineering
  • Control and Systems Engineering

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  • Cite this

    Coats, D., Wang, J., Shin, Y. J., Dougal, R. A., & Koshy, T. (2010). Applications of joint time-frequency domain reflectometry for health assessment of cable insulation integrity in nuclear power plants. In 7th International Topical Meeting on Nuclear Plant Instrumentation, Control, and Human-Machine Interface Technologies 2010, NPIC and HMIT 2010 (pp. 2032-2038). (7th International Topical Meeting on Nuclear Plant Instrumentation, Control, and Human-Machine Interface Technologies 2010, NPIC and HMIT 2010; Vol. 3).