M310改进型核电机组年换料堆芯装料操作方案研究

Research on Fuel Loading Operation Scheme for Annual Refueling Core of M310 Advanced Nuclear Power Plant

M310改进型核电机组年换料堆芯在装料操作过程中存在困难,通过M310改进型核电机组年换料堆芯的布置、燃料组件变形形式和装载措施的研究,福清核电厂1号机组第2次大修堆芯装料操作方案为例,基于对燃料组件变形特性的分析和装载基本假设,对现有的"蛇形"装料法进行深入分析,提出修正最后3排燃料组件的装载次序的优化改进方案。经实际装料验证,优化后的年换料堆芯装料操作方案是可行的,能显著提高装料的安全性与效率。

This paper discusses the difficulties of the loading operation process for the annual refueling core of M310 improved nuclear power unit, and studies the arrangement of the annual refueling core, the deformation form of the fuel assembly and the loading measures of the M310 improved nuclear power unit. Taking the loading operation scheme of the second overhaul core of Unit 1 of Fuqing Nuclear Power Plant as an example, based on the analysis and loading assumptions of the deformation characteristics of the fuel assemblys, the existing "snake" loading method is analyzed in depth and an optimization improvement scheme for correcting the loading order of the last three rows of fuel assemblies is proposed. After the verification, the optimized annual refueling core loading operation scheme is feasible, which can significantly improve the safety and efficiency of the loading operation.