Signal processing method of bubble detection in sodium flow based on inverse Fourier transform to calculate energy ratio

Nuclear Engineering and Technology

Ya Huang¹  Xin-Long Yu²  Wei Xu³  Wen-Kai Wu³  Ke-Jun Xu³ 

[1] Corresponding author. School of Electrical and Automation Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, 230009, PR China.;Engineering Technology Research Center of Industrial Automation, Anhui Province, Hefei, 230009, PR China;School of Electrical and Automation Engineering, Hefei University of Technology, Hefei, 230009, PR China;

关键词: Sodium-cooled fast reactor;    Steam generator;    Leak detection;    Electromagnetic vortex flowmeter;    Signal processing method;   

DOI  :  

来源: DOAJ

【 摘 要 】

Electromagnetic vortex flowmeter is a new type of instrument for detecting leakage of steam generator, and the signal processing method based on the envelope to calculate energy ratio can effectively detect bubbles in sodium flow. The signal processing method is not affected by changes in the amplitude of the sensor output signal, which is caused by changes in magnetic field strength and other factors. However, the detection sensitivity of the electromagnetic vortex flowmeter is reduced. To this end, a signal processing method based on inverse Fourier transform to calculate energy ratio is proposed. According to the difference between the frequency band of the bubble noise signal and the flow signal, only the amplitude in the frequency band of the flow signal is retained in the frequency domain, and then the flow signal is obtained by the inverse Fourier transform method, thereby calculating the energy ratio. Using this method to process the experimental data, the results show that it can detect 0.1 g/s leak rate of water in the steam generator, and its performance is significantly better than that of the signal processing method based on the envelope to calculate energy ratio.

【 授权许可】

Unknown