The total loss of AC power is an essential initiating event of PWR which can lead to a severe accident like Fukushima in Japan. For such improbable accidents, three cases of severe accidents of AP1000 induced by the station blackout (SBO) were simulated based on MAAP5 code. This particular analysis was conducted at 100% core power with different approaches. For the case with auto depressurization system (ADS), the primary system pressure appeared to uphold a low level for a longer duration and the external reactor vessel cooling (ERVC) system had sufficient capacity to eliminate the heat from the molten pool with a ratio of ex-vessel heat flux to critical heat flux (CHF) at about 0.49. For the case without ADS, the reactor pressure vessel (RPV) rupture will occur due to the creep effect inducing a sudden shock to the containment, and the peak pressure in the containment is still under the level at which the inelastic deformation may take place. The hydrogen production of the case without ADS in the core is 83% more than that of having ADS, while the hydrogen mole fraction in the upper containment is lower before the RPV failure. Overall, our findings are meaningful and significant for comprehending the detailed process of AP1000 severe accident induced by SBO, which is the basic standard for the development of the severe accident management guidelines (SAMG).

交流电源的全部损耗是压水堆的重要起爆事件，它可能导致日本福岛等严重事故。针对这种不太可能发生的事故，基于MAAP5代码模拟了3例由站点停电（SBO）引起的AP1000严重事故。使用不同的方法以100％的核心功率进行此特定分析。对于使用自动降压系统（ADS）的情况，主系统压力似乎会长时间保持较低水平，并且外部反应堆容器冷却（ERVC）系统具有足够的能力以比率为的比率从熔池中消除热量。容器外的热通量达到临界热通量（CHF）约为0.49。对于没有ADS的情况，反应堆压力容器（RPV）会由于蠕变效应而发生破裂，从而引起对安全壳的突然冲击，安全壳中的峰值压力仍低于可能发生非弹性变形的水平。在堆芯中没有ADS的情况下，氢的产生比具有ADS的情况下的氢产生高83％，而在RPV失效之前，上部安全壳中的氢摩尔分数较低。总体而言，我们的发现对于理解SBO引发的AP1000严重事故的详细过程具有重要意义和意义，SBO是制定严重事故管理指南（SAMG）的基本标准。