秦山一期核电站燃料组件加深燃耗后的燃料棒包壳应力、应变分析

Analysis of the Stress and Strain in the Cladding for Qinshan PWR Fuel Assembly in Extended Burnup

秦山一期核电站第九循环燃料组件加深燃耗后考验组件卸料燃耗预计达到40000MWD／TU，其中热棒的平均燃耗将达到46083MWD/TU，热棒中热点燃耗将达到54175．9MWD／TU。为了确保核电站的安全运行，首先要保证燃料棒包壳的完整性，因此包壳的应力、应变分析十分重要。计算结果表明加深燃耗后的燃料棒应力、应变仍满足设计准则的要求。

The average burnup of Qinshan PWR target assembly in the extended burnup will reach 40000MWD/TU,and the average burnup of the most spent rod will reach 46083MWD/TU, and the burnup of hot point will reach 54175.9MWD/TU. In order to ensure the safety of the nuclear power plant, first we should ensure that the cladding is integrative, so the analyses of the stress and strain in the cladding become very important. The analytic results show that the fuel rod performances meet the design criterion.