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. Abstract