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Title: Simultaneous Thermal and Gamma Radiation Aging of Electrical Cable Polymers

Abstract

The polymers used for insulation in nuclear power plant electrical cables are susceptible to aging during long term operation. Elevated temperature is the primary contributor to changes in polymer structure that result loss of mechanical and electrical properties, but gamma radiation is also a significant source of degradation for polymers used within relevant plant locations. Despite many years of polymer degradation research, the combined effects of simultaneous exposure to thermal and radiation stress are not well understood. As nuclear operators contemplate and prepare for extended operations beyond initial license periods, a predictive understanding of exposure-based cable material degradation is becoming an increasingly important input to safety, licensing, operations and economic decisions. We are focusing on carefully-controlled simultaneous thermal and gamma radiation accelerating aging and characterization of the most common nuclear cable polymers to understand the 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.

Authors:
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1433778
Report Number(s):
PNNL-SA-127562
830403000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors (EDM 2017), August 13-17, 2017, Portland, Oregon, 2:3-10
Country of Publication:
United States
Language:
English
Subject:
Cables; Nuclear; Polymers; Thermal aging; Gamma aging; Simultaneous aging

Citation Formats

Fifield, Leonard S. Simultaneous Thermal and Gamma Radiation Aging of Electrical Cable Polymers. United States: N. p., 2018. Web. doi:10.1007/978-3-319-68454-3_1.
Fifield, Leonard S. Simultaneous Thermal and Gamma Radiation Aging of Electrical Cable Polymers. United States. doi:10.1007/978-3-319-68454-3_1.
Fifield, Leonard S. Wed . "Simultaneous Thermal and Gamma Radiation Aging of Electrical Cable Polymers". United States. doi:10.1007/978-3-319-68454-3_1.
@article{osti_1433778,
title = {Simultaneous Thermal and Gamma Radiation Aging of Electrical Cable Polymers},
author = {Fifield, Leonard S.},
abstractNote = {The polymers used for insulation in nuclear power plant electrical cables are susceptible to aging during long term operation. Elevated temperature is the primary contributor to changes in polymer structure that result loss of mechanical and electrical properties, but gamma radiation is also a significant source of degradation for polymers used within relevant plant locations. Despite many years of polymer degradation research, the combined effects of simultaneous exposure to thermal and radiation stress are not well understood. As nuclear operators contemplate and prepare for extended operations beyond initial license periods, a predictive understanding of exposure-based cable material degradation is becoming an increasingly important input to safety, licensing, operations and economic decisions. We are focusing on carefully-controlled simultaneous thermal and gamma radiation accelerating aging and characterization of the most common nuclear cable polymers to understand the 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.},
doi = {10.1007/978-3-319-68454-3_1},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {4}
}

Conference:
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Works referenced in this record:

Characterisation and degradation studies of peroxide and silane crosslinked polyethylene
journal, January 1995