The radial and axial power distributions of normal operation (category I or condition I) and abnormal operation (category II or condition II) are simulated by using neutronics calculation code.

• 利用中子学计算程序对换料堆芯正常运行工况(一类工况或工况I)和中等频率事故工况(二类工况或工况II)中可能的堆芯功率分布进行模拟。