高温气冷堆主氦风机预防性维修策略研究  

Preventive maintenance strategy of the helium circulator in the high-temperature gas-cooled reactor

作　　者：陈璞 童节娟[1] 刘涛[1] 张勤昭[1] 王宏[1] CHEN Pu;TONG Jiejuan;LIU Tao;ZHANG Qinzhao;WANG Hong(Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学核能与新能源技术研究院,北京100084

出　　处：《清华大学学报（自然科学版）》2023年第8期1219-1225,共7页Journal of Tsinghua University(Science and Technology)

摘　　要：高温气冷堆主氦风机是清华大学自主研发的先进核能核心装备之一,对于反应堆的正常运行至关重要。主氦风机停机会导致反应堆紧急停堆,直接影响核电厂的运行,并可能带来安全风险。因此,需要评估主氦风机的可靠性,并对主氦风机开展预防性维修策略研究,以保障高温气冷堆核电厂高质量运行。首先,该文使用故障模式、影响和危害性分析(failure mode, effects and criticality analysis, FMECA)方法识别主氦风机的关键重要部件;然后,基于各部件的通用数据评估得出主氦风机的故障率及各部件故障率占比,为提高主氦风机的运行可靠性提供参考依据;最后,使用以可靠性为中心的维修分析(reliability centered maintenance analysis, RCMA)对主氦风机的预防性维修策略进行规划,提出预防性维修方案建议。该文研究成果可为新研核能设备提升设计质量提供参考,为其他相关核能设施开展可靠性和维修性研究提供借鉴。[Objective]The helium circulator of the high-temperature gas-cooled reactor(HTGR)is advanced core equipment independently developed by Tsinghua University and is highly important for normal reactor operation.The shutdown of the helium circulator will lead to an emergency shutdown of the reactor,directly affecting the operation of the nuclear power plant and possibly causing safety problems.Therefore,it is necessary to evaluate the reliability of the helium circulator and study the preventive maintenance strategy to ensure the high-quality operation of the HTGR demonstration project(HTR-PM).[Methods]First,we used the failure mode,effects and criticality analysis(FMECA)method to analyze the failure modes,causes,effects,and degree of severity of the components of the helium circulator and list the usage guarantee recommendations.Since FMECA has not been performed on HTGR thus far,we referred to the national military standard to specify the severity degree of the helium circulator's failure consequences.Through FMECA,we can also identify its key components,the parts that must be emphasized during the design and maintenance of the circulator.Then,we used the general component data to determine the failure rate of the circulator and the failure rate proportion of each component.Finally,we used the reliability-centered maintenance analysis(RCMA)method to plan the preventive maintenance strategy of the circulator and put forward preventive maintenance plan suggestions.Preventive maintenance is mainly performed through condition monitoring,function test,etc.,which will not affect the normal operation of nuclear power plants.According to RCMA,the preventive maintenance measures of the helium circulator mainly include condition-based maintenance(CBM),usage inspection,function test,and so on.CBM can be performed online,and other preventive maintenance measures can be completed during the overhaul;thus,these measures can effectively improve system availability and reduce financial losses.In addition,the maintenance interval i

关 键 词：主氦风机 故障模式、影响和危害性分析 以可靠性为中心的维修分析 高温气冷堆 

分 类 号：TL413.1[核科学技术—核技术及应用]