320MW压水反应堆无外加中子源启动分析

摘要

During startup of the reactor, reactor neutron flux varies greatly,Neutron flux from zero power to full power a lot of difference,However, at low neutron flux levels, statistical properties of the measuring instrument has a slow response characteristics, so if you do not maintain proper control the neutron flux, particularly during startup, an accident is likely to occur. Secondary neutron source assembly can be repalaced by certain burnup irradiated fuel assembly.%在反应堆的启动过程中，堆内中子通量的变化范围甚大，从零功率到满功率是一个包含每秒几个中子增长到每秒1013个中子的和裂变范围。然而在低中子通量水平，测量仪器的统计特性使仪器具有缓慢的响应特性，因此如果不保持适当的控制，特别是在反应堆启动过程中，很可能发生事故，二次中子源对换料堆芯的安全启动起着至关重要的作用，而且一定燃耗的已辐照燃料组件可以替代二次中子源组件，使源量程探测器获得有效计数。