Simultaneous Thermal and Gamma Radiation Aging of Electrical Cable Polymers

  • Leonard S. FifieldEmail author
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)


Elevated temperature is the primary source of aging for nuclear power plant electrical cable insulation and jacketing, but gamma radiation is also a significant contributor to structural changes that result in loss of polymer mechanical and electrical properties in affected plant locations. Despite many years of research, the combined degradation effects of simultaneous exposure to thermal and radiation stresses are not well understood. As nuclear operators prepare for extended operation beyond initial license periods, a predictive understanding of exposure-based cable degradation is becoming an increasingly important input to safety, licensing, operations and economic decisions. We focus on carefully-controlled simultaneous thermal and gamma radiation aging and characterization of the most common nuclear cable polymers to understand relative contributions of temperature, time, dose and dose rate to changes in cable polymer material structure and properties. Improved understanding of cable performance in long term operation will help support continued sustainable nuclear power generation.


Cables Nuclear Polymers Thermal aging Gamma aging Simultaneous aging 



Funding for this work has been provided by the Materials Aging and Degradation Pathway of the U.S. Department of Energy Office of Nuclear Energy Light Water Reactor Sustainability Program and the Nuclear Energy University Program. Data described herein was obtained with the assistance of Birgit Schwenzer, Miguel Correa, Ian Childers, Shuaishuai Liu, Mark Murphy and Andy Zwoster. The Pacific Northwest National Laboratory is operated by Battelle for the United States Department of Energy under Contract DE-AC05-76RL01830.


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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.Pacific Northwest National LaboratoryRichlandUSA
  2. 2.Washington State UniversityPullmanUSA

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