Preliminary Analysis of AP1000 PCCS and Its Enhanced Performance
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摘要: 为分析先进非能动型压水堆(AP1000)非能动安全壳冷却系统(PCCS)的运行特征,建立单体积模型来计算安全壳内部气体混合物的传热,并结合前期已开发的安全壳外部水膜蒸发冷却的多体积程序,对冷却剂丧失事故(LOCA)下的安全壳运行压力进行计算,计算结果与WGOTHIC以及相关文献的结果吻合良好。通过讨论安全壳的运行特性,分析安全壳的排热能力。最后提出抑压方案来提高PCCS的性能,新的方案能够抑制大约10%的安全壳压力,降低PCCS的工程投资和难度。
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关键词:
- 先进非能动型压水堆(AP1000) /
- 安全壳 /
- 运行性能 /
- 冷却剂丧失事故(LOCA) /
- 传热
Abstract: To analyze the operation features of the Passive Containment Cooling System(PCCS) for the Advanced Passive Pressurized Water Reactor,the one-volume model was developed to calculate the heat transfer of the containment inner gas mixture.The previous multi-volume code for the containment external cooling by evaporation was adopted and accordingly the coupled code was used to calculate the LOCA accident.The simulation results fitted well with WGOTHIC and another reference one.By discussing the containment operation performances,the containment output performance was concluded.Finally,a suppression scheme was provided to improve the PCCS output performances.A new scheme is proposed which can suppress about 10% of the containment pressure and can reduce the engineering investments and difficulties for PCCS.-
Key words:
- AP1000 /
- Containment /
- Operation performance /
- LOCA /
- Heat transfer
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