Campus Units

Materials Science and Engineering, Center for Nondestructive Evaluation (CNDE)

Document Type

Conference Proceeding

Conference

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

Publication Version

Accepted Manuscript

Link to Published Version

https://doi.org/10.1109/CEIDP.2018.8544855

Publication Date

2018

Journal or Book Title

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

First Page

598

Last Page

601

DOI

10.1109/CEIDP.2018.8544855

Conference Title

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

Conference Date

October 21-24, 2018

City

Cancun, Mexico

Abstract

Power and instrumentation cables play a crucial role in the safe operation of Nuclear Power Plants (NPPs). Thermal and other stressors present in the reactor environment cause the cable materials to degrade. In this work, dielectric and mechanical properties of cable insulation and jacket materials are studied as they are thermally aged, supporting development of non-destructive evaluation sensors for monitoring cable aging. Materials selected for this study are found in certain types of single-core unshielded power cables. These utilize ethylene propylene rubber (EPR)-based insulation material and chlorinated polyethylene (CPE)-based jacket material. Flat mats of these materials were obtained from the cable manufacturer and thermally aged at 140 °C in an air-circulating oven. Elongation-at-break was measured on tensile specimens stamped from the aged mats, and dielectric properties were measured from 100 Hz to 100 kHz using a parallel plate capacitor and precision LCR meter. In the case of aged EPR-based materials, rapid decrease in elongation at break indicating end of useful life was accompanied by a significant increase in dissipation factor, D, measured at 100 kHz. Capacitive measurement of D shows promise, therefore, as a non-destructive indicator of corresponding mechanical property changes in thermally-aged EPR-based insulation materials.

Comments

This proceeding was published as Sriraman, Aishwarya, Nicola Bowler, S. W. Glass, and Leonard S. Fifield. "Dielectric and Mechanical Behavior of Thermally Aged EPR/CPE Cable Materials." In 2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), (2018): 598-601. DOI: 10.1109/CEIDP.2018.8544855. Posted with permission.

Rights

© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Copyright Owner

IEEE

Language

en

File Format

application/pdf

Published Version

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Article Location

 
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