CAJ | 학술논문

核动力装置运行状态的诊断关系到装置运行的安全性和可靠性。针对核动力装置系统复杂，难以建立数学模型的特点，本文将基于定性模型的符号有向图（SDG ）方法应用于核动力装置中进行故障诊断，并以核动力装置主冷却剂系统为研究对象，提出了相应的建模方法并建立了SDG模型，根据所建立的模型开发了基于 SDG 方法的核动力装置故障诊断系统，并以蒸汽发生器传热管破裂（SGTR）事故和弹棒事故为例对该系统的诊断推理过程进行了分析。仿真结果表明，基于SDG的方法在核动力装置中能有效诊断故障，并能提供故障传播路径，具有良好的解释性，可为运行人员决策提供帮助。
핵동력장치운행상태적진단관계도장치운행적안전성화가고성。침대핵동력장치계통복잡，난이건립수학모형적특점，본문장기우정성모형적부호유향도（SDG ）방법응용우핵동력장치중진행고장진단，병이핵동력장치주냉각제계통위연구대상，제출료상응적건모방법병건립료SDG모형，근거소건립적모형개발료기우 SDG 방법적핵동력장치고장진단계통，병이증기발생기전열관파렬（SGTR）사고화탄봉사고위례대해계통적진단추리과정진행료분석。방진결과표명，기우SDG적방법재핵동력장치중능유효진단고장，병능제공고장전파로경，구유량호적해석성，가위운행인원결책제공방조。
The diagnosis of the operational state of a nuclear power plant (NPP) plays an important role for the safety and reliability of NPP operation .In this paper ,the qual-itative method for fault diagnosis based on signed directed graph (SDG) was applied in a complex NPP system because the mathematical model of NPP is difficult to be built . The reactor coolant system (RCS) was taken as the diagnostic object ,and the approach of building SDG model was presented and the SDG model of the RCS was built .Based on the SDG model ,a fault diagnosis system of RCS was developed ,and the steam gen-erator tube rupture (SGTR) and rod ejection accidents were taken as example to analyze the process of diagnosis inference .The simulation results show that the method based on SDG can effectively diagnose the fault in RCS ,and it can also provide good explana-tion for the fault propagation paths .T herefore ,this method can help operators to make correct decisions .