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Capacitive Nondestructive Evaluation of Aged Cross-Linked Polyethylene (XLPE) Cable Insulation Material

  • Z. H. ShaoEmail author
  • N. Bowler
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

Cross-linked polyethylene (XLPE) is used widely as insulation material in low-voltage instrumentation cables deployed in nuclear power plants (NPPs). Suffering from degradation due to exposure to heat and radiation, the insulating properties of the material gradually degrade, which may imperil the safe operation of NPPs. In this paper, a new capacitive sensing method is introduced for nondestructive evaluation of aged instrumentation cable with XLPE insulation. The capacitive sensor is capable of measuring capacitance of cable materials and may potentially be employed to extract the dielectric properties of insulation material from those of the entire cable. Interdigital capacitive sensor designs are targeted that maximize sensitivity to changes in the dielectric values of the cable polymers.

Keywords

Capacitive sensor Nondestructive evaluation Nuclear cable Polymer degradation 

Notes

Acknowledgements

This work was funded by the United States Department of Energy under contract number DE-NE0008269.

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.Iowa State UniversityAmesUSA

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