Nuclear Techniques ›› 2014, Vol. 37 ›› Issue (07): 70603-070603.doi: 10.11889/j.0253-3219.2014.hjs.37.070603

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Nuclear grade cable thermal life model by time temperature superposition algorithm based on Matlab GUI

LU Yanyun GU Shenjie LOU Tianyang   

  1. (Shanghai Nuclear Engineering Research & Design Institute, Shanghai 200233, China)
  • Received:2014-03-11 Revised:2014-03-25 Online:2014-07-10 Published:2014-07-07

Abstract: Background: As nuclear grade cable must endure harsh environment within design life, it is critical to predict cable thermal life accurately owing to thermal aging, which is one of dominant factors of aging mechanism. Purpose: Using time temperature superposition (TTS) method, the aim is to construct nuclear grade cable thermal life model, predict cable residual life and develop life model interactive interface under Matlab GUI. Methods: According to TTS, nuclear grade cable thermal life model can be constructed by shifting data groups at various temperatures to preset reference temperature with translation factor which is determined by non-linear programming optimization. Interactive interface of cable thermal life model developed under Matlab GUI consists of superposition mode and standard mode which include features such as optimization of translation factor, calculation of activation energy, construction of thermal aging curve and analysis of aging mechanism. Results: With calculation result comparison between superposition and standard method, the result with TTS has better accuracy than that with standard method. Furthermore, confidence level of nuclear grade cable thermal life with TTS is higher than that with standard method. Conclusion: The results show that TTS methodology is applicable to thermal life prediction of nuclear grade cable. Interactive Interface under Matlab GUI achieves anticipated functionalities.

Key words: Nuclear grade cable, Thermal life model, Time temperature superposition, Elongation-at-break