Implementation of Non-Destructive Condition Monitoring Techniques on Low-Voltage Nuclear Cables: II. Thermal Aging of EPR/CSPE Cables

Ehtasham Mustafa, Ramy S. A. Afia, Aamir Nawaz, Oumaima Nouini and Zoltán Ádám Tamus
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Ehtasham Mustafa: Department of Electrical Engineering, Gomal University, Dera Ismail Khan 29050, Pakistan
Ramy S. A. Afia: Department of Electric Power Engineering, Budapest University of Technology & Economics, H-1111 Budapest, Hungary
Aamir Nawaz: Department of Electrical Engineering, Gomal University, Dera Ismail Khan 29050, Pakistan
Oumaima Nouini: Department of Electric Power Engineering, Budapest University of Technology & Economics, H-1111 Budapest, Hungary
Zoltán Ádám Tamus: Department of Electric Power Engineering, Budapest University of Technology & Economics, H-1111 Budapest, Hungary

Energies, 2022, vol. 15, issue 9, 1-16

Abstract: Determining the aging state of low-voltage nuclear power plant cables using a nondestructive and reliable condition monitoring technique is highly desirable as the cables experience multiple aging stresses during the service period. This paper deals with the implementation and investigation of such nondestructive techniques, which can detect the overall aging state of low-voltage instrumentation and control (I&C) cables, which are subjected to accelerated thermal aging. The dielectric spectroscopy, extended voltage response, and polarization–depolarization current as nondestructive electrical aging techniques were used for the investigation purpose, while the elongation at break was also adopted as a mechanical measurement and for comparison. Prominent variations in the electrical parameters for the insulation and jacket were observed, whereas the elongation at break for both materials also decreased under thermal aging. Based on the electrical techniques, aging markers were selected that showed a strong correlation with the aging and elongation at break, proving the ability of the adopted electrical methods as a nondestructive condition monitoring technique.

Keywords: nuclear power plant; low-voltage cables; thermal aging; electrical aging markers; dielectric spectroscopy; extended voltage response; polarization–depolarization current; elongation at break (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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