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

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


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.


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


  1. C. Lee, G. Y. Kim, and P. H. Kang, J. KSIEC, Applied Chemistry, 10, 13 (2006).
  2. Irradiation Effects on Polymers (D. W. Clegg and A. A. Collyer, United Kingdom, 1991) p. 360.
  3. ASTM D 2307, Standard Test Method for Tensile Properties of Organic Coatings
  4. N. R. Mann and K. W. Fertig, Technometrics, 17, 361 (1975). [DOI:]
  5. A. Broido, J. Polymer Science part A-2, 7, 1761 (1969). [DOI:]
  6. E. S. Kim, Activation Energy and Adhesion of Silicone Rubber/Clay Nanocomposites, Inha University, Incheon (2006).
  7. C. Lee, G. Y. Kim, B. H. Ryu, and K. J. Lim, J. Korean Society of Safety, 18, 50 (2003).
  8. V. Placek, J. Thermal Analysis and Calorimetry, 80, 525 (2005). [DOI:]
  9. K. S. Kang, J. Journal of the Electric World / Monthly Magazine, 46 (2014).
  10. K. H. Park, Study on Vulcanization and Degradation Reaction of Modified NR Rubber Compound Using DSC, TGA and TMA, Keimyung University, Daegu (2009).
  11. M. J. Starink, Thermochimica Acta, 404, 163 (2003). [DOI:]
  12. K. J. Bang, A Stduy on the Analysis of Activation Energy for Class 1E Cable in Nuclear Power Plant, Chosun University, Gwangju (2011).
  13. Y. N. Gupta, S. M. Abbas, R. B. Sharma, and D. K. Setua,, J. Therm. Anal. Calorim., 119, 1393 (2015). [DOI:]
  14. S. J. Jung, H. S. Kwon, and D. S. Hong, Proc. of the Korean Inst. Electr. Engineers, Annual Summer Conf. (2013).
  15. J. Y. Kim and D. H. Park, Proc. of the IEEE Electr. Insula. Conf. (IEEE EIC, Seattle, USA, 2015) p. 5.
  16. IEEE Std. 1205-2000, IEEE Guide for Assessing, Monitoring, and Mitigating Aging Effects on Class 1E Equipment Used in Nuclear Power Generating Stations.
  17. EPRI TR-106370, Reduction of Oxidation Induction Time Testing to Practice as a Life Assessment Technique for Cable Insulation (1996).
  18. K. Y. Kim, H. G. Kang, C. Lee, and B. H. Ryu, Journal of the KIIS, 18, 57 (2003).


Supported by : 원광대학교