运行核电厂堆芯吊篮壳型振动特性研究
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摘要
反应堆堆芯吊篮的振动反映了吊篮及相关堆内构件的振动情况与设备稳定性,是评估反应堆安全运行的重要依据。本文采用中子噪声技术和信号时频域分析方法,重点研究了堆芯吊篮壳型振动特性,通过分析某核电厂特定机组近几年的监测数据,获得堆芯吊篮壳型振动模态参数的变化趋势。结果表明,在每个燃料周期内,吊篮壳型振动频率有逐渐变小趋势,每经历一次大修后,振动中心频率基本恢复至上一个燃料循环的初始振动频率处。研究结果有助于了解堆芯吊篮在多个燃料循环周期内壳型振动的特性和成因,为堆芯吊篮早期故障诊断奠定基础。
The vibration of the reactor core barrel reflects the vibration condition and equipment stability of the core barrel and corresponding reactor internals. This paper mainly focuses on the vibration characteristics of the core barrel shell mode with neutron noise technique and time-frequency signal analysis, and the change trend of shell mode characteristic quantities are obtained. The result shows that the vibration frequency of the core barrel shell mode has a decreasing trend within each fuel cycle and the vibration frequency would be recovered to the initial vibration frequency of the beginning of the last fuel cycle. The research of this paper contributes to further understanding of the vibration characteristic quantities of the core barrel shell mode and its causes of formation in multi-fuel cycles. The study results lay the foundation for early fault diagnosis for the core barrel.
The vibration of the reactor core barrel reflects the vibration condition and equipment stability of the core barrel and corresponding reactor internals. This paper mainly focuses on the vibration characteristics of the core barrel shell mode with neutron noise technique and time-frequency signal analysis, and the change trend of shell mode characteristic quantities are obtained. The result shows that the vibration frequency of the core barrel shell mode has a decreasing trend within each fuel cycle and the vibration frequency would be recovered to the initial vibration frequency of the beginning of the last fuel cycle. The research of this paper contributes to further understanding of the vibration characteristic quantities of the core barrel shell mode and its causes of formation in multi-fuel cycles. The study results lay the foundation for early fault diagnosis for the core barrel.
引文
[1]刘才学,魏东,房成春,等.中子噪声在核反应堆堆芯吊篮振动监测中的应用研究[J].核动力工程,2006,27(1):30-33.
[2]杨泰波,刘才学,罗婷,等.基于中子噪声分析的某电厂堆芯吊篮梁型振动特征研究[J].核科学与工程,2017,37(1):42-47.
[3]罗婷,刘才学,杨泰波,等.宁德核电站1号机组堆芯吊篮梁型振动特性研究[J].科学技术与工程,2018,18(13):238-241.
[4]IEC.Nuclear power plants-pressurized water reactorsvibration monitoring of internal structures:IEC-61502[S].U.S.:International Electrotechnical Commission,1999:11.
[5]刘才学.基于中子噪声分析技术的核电站振动监测系统研制[J].核动力工程,2009,30(6):91-94.
[2]杨泰波,刘才学,罗婷,等.基于中子噪声分析的某电厂堆芯吊篮梁型振动特征研究[J].核科学与工程,2017,37(1):42-47.
[3]罗婷,刘才学,杨泰波,等.宁德核电站1号机组堆芯吊篮梁型振动特性研究[J].科学技术与工程,2018,18(13):238-241.
[4]IEC.Nuclear power plants-pressurized water reactorsvibration monitoring of internal structures:IEC-61502[S].U.S.:International Electrotechnical Commission,1999:11.
[5]刘才学.基于中子噪声分析技术的核电站振动监测系统研制[J].核动力工程,2009,30(6):91-94.