Research on Service Life of Main Step-up Transformer in AP1000 Nuclear Power Plant

The design life of the main step-up transformer in AP1000 Nuclear Power Plant is 60 years,which is significantly larger than in regular plants.The main focus of this paper is on the life expectancy of transformer.This paper shows the methods to detect the degree of aging in the transformers and then presents various factors that will affect the life expectancy of the transformer.Through analysis,the author proposes methods and steps to alleviate the aging problem and effectively prolong the life expectancy of the main transformer.