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针对失水事故(LOCA)后防止低压安注泵或安全壳喷淋泵功能完全失效(H4)的超设计基准事故,设计了H4管线,在H4工况时,利用仍然可用的低压安注泵或安全壳喷淋泵实现堆芯长期冷却的功能。对H4工况下安全注入系统(RIS)与安全壳喷淋系统(EAS)的备用进行试验,通过选取低特性与高特性的低压安注泵和低特性的安全壳喷淋泵,验证了各项性能参数在事故工况时仍能满足要求,同时验证了向反应堆冷却剂系统(RCP)系统冷、热段注入时,泵的出口流量满足秦山核电厂扩建项目(方家山核电工程)调试大纲中的安全准则。
The H4 pipeline was designed for over-design basis accidents that prevent complete failure of low-pressure safety pump or containment spray pump after LOCA (H4), and still use the low-pressure safety pump Or containment spray pump core long-term cooling function. The H4 working condition safety injection system (RIS) and containment spray system (EAS) spare test were carried out. The low-pressure safety pump with low-characteristic and high-characteristic and the low-pressure safety pump with sprinkler were selected, Term performance parameters can meet the requirements in the accident conditions, while verifying the reactor coolant system (RCP) system cold and hot section injection, the pump outlet flow to meet Qinshan Nuclear Power Plant Expansion Project (Fang Shan Nuclear Power Project) Commissioning Outline In the safety guidelines.