The results showed: (1) Under large perturbation such as accident conditions the void reactivity feedback caused by subcooled boiling is considerable, and, bigger difference exists between various subcooled boiling models.

• 结果表明:(1)在大扰动(如事故工况)下,过冷沸腾引起的空泡反应性反馈对系统稳定性影响显著,不同过冷沸腾模型之间存在较大差别;