堆芯温度分布对压力容器液位测量影响分析

摘要

对堆芯温度不均匀分布而导致CPR1000核电站堆芯冷却监测系统CCMS压力容器液位测量误差进行了量化计算。结果表明，停堆后主泵保持运行，由该物理现象引入的误差可以忽略。对失去全部给水情形下引入较大的高估误差，结合状态导向法事故运行程序SOP，对该误差对操纵员安全重要操作的影响进行了分析。%The impact on Reactor vessel level monitoring of CCMS due to uneven distribution of the core temper-ature in CPR1000 nuclear power plant is analyzed,the result shows that the uncertainty induced by the physical phenomenon,with the reactor coolant pumps keep in service,can be ignored.The impact on operator actions in SOP due to over-estimated reactor vessel level under total loss of feed water accident is also analyzed,the con-clusion shows this over-estimation will not affect safety actions to be implemented in SOP.