快堆燃料组件六角形外套管截面在冷却剂压差的作用下会产生弹性变形,在温度场和中子场的作用下会产生热膨胀、辐照肿胀和辐照蠕变,这些变形关系到多根组件之间接触状态的正确判断,是整个燃料组件变形计算方法研究的重要基础性工作.本文目的在于探讨确定考虑温度和辐照因素影响的燃料组件六角形截面的变形计算方法,本文最终得到了变形计算公式,其中弹性变形计算公式与有限元结果进行比较验证后结果吻合,本文的研究成果为后续研究提供了依据和基础,具有重要意义.%The cross section deformation of hexagonal fuel-assembly duct in fast reactor, including elastic deformation due to the coolant pressure, the expansion of temperature growth and the creep and swelling deformation of neutron irradiation, is associated with the correct judgment of contact between different fuel-assemblies. It is a fundamental work to further determine the entire deformation of all fuel-assemblies. The purpose of this paper is to study the calculation method of the deformation, which is caused by temperature and irradiation. Based on theoretical analysis, a formula to calculate the deformation is developed, whose elastic part is compared with and verified by those of finite element method. The yielded results will pave the way for the future further study.
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