基于SPND跳堆功能研究

Study on SPND Based Reactor Trip Function

反应堆保护系统的功能是保护三大核安全屏障（即燃料包壳、一回路压力边界和安全壳）的完整性。在发生设计基准工况DBC2～4工况下，反应堆保护系统自动启动，执行跳堆功能，使反应堆达到可控状态。目前在建的EPR反应堆跳堆功能，偏离泡核沸腾比低（LDNBR）和线功率密度高（HLPD）均是基于自给能中子通量探测器（SPND）测量的中子通量计算的结果。本文对EPR核电厂基于SPND跳堆功能进行了研究，进一步分析和研究反应堆保护功能的要求，以分析此设计是否满足标准法规对核电厂安全运行和审评的要求。分析结果表明，现有设计能满足标准法规的要求。

The function of protection system is to protect the integration of three nuclear safety barriers .In case of DBC2‐4 ,the reactor protection system will be initiated auto‐matically to perform the reactor trip function in order to reach control state .Under the construction EPR NPP ,reactor trip function is LDNBR and HLPD .LDNBR and HLPD are based on SPND measurement .The SPND based reactor trip function was analyzed , and the protection system function requirement was further analyzed .The results show that the current design can satisfy the standard requirement .