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压水堆核电厂在负荷追随运行模式和计划停堆工况下，包壳疲劳是导致燃料棒发生破坏的原因之一，影响核电厂运行的安全性和经济性。利用上海核工程研究设计院提供的数据和ＦＥＭＡＸＩ－ＩＶ燃料元件性能分析程序计算燃料包壳的局部应力和应变；用自编ＦＡＴＩＧ－１程序计算疲
Under load follow-up operation mode and planned shutdown condition, the fatigue of the cladding is one of the causes of the destruction of the fuel rods, which affects the safety and economy of the operation of the NPP. The local stress and strain of the fuel cladding were calculated using the data provided by Shanghai Nuclear Engineering Research and Design Institute and the FEMAXI-IV fuel element performance analysis program. The FATIG-1 program was used to calculate the fatigue