燃料组件错装载事故是Ⅲ类事故(稀有事故),可能导致堆芯功率分布的变化.装载过程中可能发生的燃料组件错位的情况几乎是无穷的,无法一一计算.事故分析中我们选取四种典型事故工况,针对堆芯设计采用合理的事故假设并开展模拟计算.基于对在线核心监测系统监测意外负荷能力的肯定,大多数错装载事故可以通过在线监测系统的堆芯监测功能检测出来.针对检测不到的组件错装载事故工况,模拟计算得到最大核焓升因子FΔH为1.66,在安全限值要求范围内.%Inadvertent loading error can occur in a reactor core. Peaking factors of the core could be increased significantly due to the misplaced fuel assemblies. This event is a Condition Ⅲ incident (an infrequent fault). Technically the cases of misplacing assembles is nearly infinite. Some typical cases need to be chosen for the incident analysis. The purpose of analysis is to affirm the ability of the online core monitoring system to detect the inadvertent loading. The method of the analysis is described in this paper. Most of the misloading can be detected by the online core monitoring system and eliminated by rearranging the core pattern. Some cases not detected still satisfy the safety requirements, which the nuclear enthalpy rise factor FΔHis less than the design limits.
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