基于GO法的船用反应堆设备冷却水系统DPSA研究

DPSA(dynamic PSA)与传统的PSA相比,能够很好的解决包含时间、过程变量以及人员操作行为等动态因素方面的问题。根据船用反应堆设备冷却水系统的原理和运行特点,基于GO法原理创建了操作符互备自投门,并导出互备自投门的可靠性参数随时间变化的状态转移方程,从而建立了设备冷却水系统的DPSA动态计算模型。分析结果表明:该模型可以合理地分析计算设备冷却水系统的不可用度随时间的变化。

DPSA Research of Component Cooling Water System in Marine Nuclear Reactor Based on GO Methodology

Comparing with conventional PSA（Probabilistic Safety Assessment） method,DPSA（Dynam-ic PSA） method can properly deal with the dynamic issues,such as time,process variables and activi-ties of operator.According to the principle and characteristics of marine reactor component cooling water system,the paper establishes a series of operation symbols of the gate which is mutually standby and au-tomatically devoted based on GO methodology,and educesstate transfer equation of the gate where relia-bility parameters are time-varying,and therefore establishes dynamic calculation model of DPSA with component cooling water system.The results show that this model can be used to analyze and calculate the unavailability of the time-varying cooling water system rationally.It also proves that the GO method-ology is effective and practical in use,which may promote the application and development of PSA tech-nique in marine nuclear power unit.