| Research Article |
|
|
|
|
|
Preventive maintenance strategy of the helium circulator in the high-temperature gas-cooled reactor |
| CHEN Pu, TONG Jiejuan, LIU Tao, ZHANG Qinzhao, WANG Hong |
| Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China |
|
|
|
|
Abstract [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 is mainly based on the severity degree and the proportion of the failure rate of components, as well as the corresponding maintenance measures. A more accurate maintenance interval must be updated after receiving the monitoring data feedback.[Results] The calculated failure rate of the helium circulator was 0.18 times/year, which met the design criteria that the helium circulator shut down due to failure should occur less than once a year. However, a more accurate failure rate evaluation needs to be further updated after accumulating actual operation data. The calculation results showed that the drive motor in the helium circulator exhibited the highest failure rate of 88.57%, while that of the frequency converter in the drive motor was 60.82%. Therefore, the reliability of these components should be increased to improve that of the helium circulator. The reliability prediction results can provide a reference for improving the design and then the operation reliability of the helium circulator.[Conclusions] The research process of this paper is significant as a reference for conducting reliability analysis, improving the design quality, and planning maintenance strategy of newly developed nuclear power equipment, and it can also provide insights for relevant analyses of equipment in other nuclear power plants.
|
| Keywords
helium circulator
failure mode, effects and criticality analysis (FMECA)
reliability-centered maintenance analysis (RCMA)
high-temperature gas-cooled reactor
|
|
Issue Date: 22 July 2023
|
|
|
[1] ZHAO G, YE P, WANG H, et al. Endurance test of full-scale mock-up helium circulator for HTR-PM[J]. Nuclear Engineering and Design, 2018, 329:20-24.
[2] 张作义, 吴宗鑫, 王大中, 等. 我国高温气冷堆发展战略研究[J]. 中国工程科学, 2019, 21(1):12-19. ZHANG Z Y, WU Z X, WANG D Z, et al. Development strategy of high temperature gas cooled reactor in China[J]. Strategic Study of CAE, 2019, 21(1):12-19. (in Chinese)
[3] 王捷, 王宏, 赵钢, 等. 高温气冷堆氦气透平压气机和主氦风机研究进展[J]. 清华大学学报(自然科学版), 2021, 61(4):350-360. WANG J, WANG H, ZHAO G, et al. Helium turbo-compressor and circulator for a high temperature gas-cooled reactor[J]. Journal of Tsinghua University (Science and Technology), 2021, 61(4):350-360. (in Chinese)
[4] ZHOU H Z, WANG J. Helium circulator design and testing[J]. Nuclear Engineering and Design, 2002, 218(1-3):189-198.
[5] SINGH J, SINGH S, SINGH A. Distribution transformer failure modes, effects and criticality analysis (FMECA)[J]. Engineering Failure Analysis, 2019, 99:180-191.
[6] CATELANI M, CIANI L, CRISTALDI L, et al. Electrical performances optimization of photovoltaic modules with FMECA approach[J]. Measurement, 2013, 46(10):3898-3909.
[7] 陈杰. 核电厂设备水热交换器可靠性分析[D]. 上海:上海交通大学, 2017. CHEN J. Reliability analysis of water heat exchanger in nuclear plant[D].Shanghai:Shanghai Jiao Tong University, 2017. (in Chinese)
[8] 宗树枫. 核电厂数字化反应堆控制系统可靠性分析[D]. 上海:上海交通大学, 2019. ZONG S F. Reliability analysis of digital nuclear power control system of nuclear power plant[D]. Shanghai:Shanghai Jiao Tong University, 2019. (in Chinese)
[9] 袁帅. 基于FMECA的机械密封系统失效分析[D]. 青岛:中国石油大学(华东), 2015. YUAN S. Failure analysis of the mechanical seal system based on FMECA[D]. Qingdao:China University of Petroleum (East China), 2015. (in Chinese)
[10] 孙黎. 军工企业型号产品关键件和重要件的识别方法[J]. 质量与认证, 2016(12):56-57. SUN L. The identification method of key parts and important parts of military enterprise model products[J].China Quality Certification, 2016(12):56-57. (in Chinese)
[11] 李瑞莹, 康锐, 党炜. 机械产品可靠性预计方法的比较与选择[J]. 工程机械, 2009, 40(5):53-57. LI R Y, KANG R, DANG W. Comparison and selection of prediction methods for mechanical products reliability[J].Construction Machinery and Equipment, 2009, 40(5):53-57. (in Chinese)
[12] 李晓明. 基于RCM的核电站维修优化研究与应用[D]. 武汉:华中科技大学, 2005. LI X M. A research and application of RCM in optimization of maintenance for nuclear power stations[D]. Wuhan:Huazhong University of Science and Technology, 2005. (in Chinese)
[13] 任晓伟, 王华吉, 樊晓晨, 等. 基于RCMA的运载火箭活动发射平台大修方法设计研究[J]. 导弹与航天运载技术, 2022(1):79-84. REN X W, WANG H J, FAN X C, et al. Research on capital repair method of launch vehicle launch pad based on RCMA[J]. Missiles and Space Vehicles, 2022(1):79-84. (in Chinese)
[14] 武禹陶, 贾希胜, 温亮, 等. 以可靠性为中心的维修(RCM)发展与应用综述[J]. 军械工程学院学报, 2016, 28(4):13-21. WU Y T, JIA X S, WEN L, et al. A review of reliability centered maintenance (RCM):Development and application[J]. Journal of Ordnance Engineering College, 2016, 28(4):13-21. (in Chinese)
[15] ENJAVIMADAR M H, RASTEGAR M. Optimal reliability-centered maintenance strategy based on the failure modes and effect analysis in power distribution systems[J]. Electric Power Systems Research, 2022, 203:107647.
[16] 陈宇, 朱卫海. 以可靠性为中心的维修技术在大亚湾核电站的应用[J]. 电力设备, 2008, 9(12):113-116. CHEN Y, ZHU W H. Application of RCM in Dayabay nuclear power station[J]. Electrical Equipment, 2008, 9(12):113-116. (in Chinese)
[17] MOKASHI A J, WANG J, VERMAR A K. A study ofreliability-centredmaintenance in maritime operations[J]. MarinePolicy, 2002, 26(5):325-335.
[18] 王文智. 以可靠性为中心的维修分析在装备寿命周期内的应用[J]. 航空维修与工程, 2021(12):23-27. WANG W Z. Application of reliability centered maintenance analysis in equipment life cycle[J]. Aviation Maintenance & Engineering, 2021(12):23-27. (in Chinese)
[19] 吕一农. 以可靠性为中心的维修(RCM)在电力系统中的应用研究[D]. 杭州:浙江大学, 2005. LV Y N. Research on application of reliability-centered maintenance (RCM) in power system[D]. Hangzhou:Zhejiang University, 2005. (in Chinese) |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
2023,
Vol. 63
