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Thermal Analysis and Equivalent Lifetime Prediction of Insulation Material for Nuclear Power Cable

원전 케이블용 절연재료의 열분석과 등가수명

Kim, Ji-Yeon;Yang, Jong-Suk;Park, Kyeung-Heum;Seong, Baek-Yong;Bang, Jeong-Hwan;Park, Dae-Hee
김지연;양종석;박경흠;성백용;방정환;박대희

  • Received : 2015.11.25
  • Accepted : 2015.12.21
  • Published : 2016.01.01

Abstract

The activation energy of a material is an important factor that significantly affects the lifetime and can be used to develop a degradation model. In this study, a thermal analysis was carried out to evaluate and collect quantitative data on the degradation of insulation materials like EPR and CSP used for nuclear power plant cables. The activation energy was determined from the relationship between log ${\beta}$ and 1/T based on the Flynn.Wall.Ozawa method, by a TGA test. The activation energy was also derived from the relationship between ln(t) and 1/T based on isothermal analysis, by an OIT test. The activation energy of EPR derived from thermal analysis was used to calculate the accelerated aging time corresponding to the number of years of use, employing the Arrhenius equation, and determine the elongation corresponding to the accelerated aging time.

Keywords

Insulation material;Thermal analysis;Arrhenius;Activation energy;Lifetime

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Acknowledgement

Supported by : 원광대학교