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Updated: Jan 22, 2026

High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition
Published on: June 27, 2025
Peak-to-peak standard deviation based bubble detection method in sodium flow with electromagnetic vortex flowmeter
Wei Xu1, Ke-Jun Xu1, Jian-Ping Wu1
1School of Electrical and Automation Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.
This study presents a novel signal processing method for detecting steam generator leakage in sodium-cooled fast reactors. The developed system accurately identifies small leaks using an electromagnetic vortex flowmeter, enhancing nuclear reactor safety.
Area of Science:
- Nuclear Engineering
- Materials Science
- Signal Processing
Background:
- Steam generators (SGs) in sodium-cooled fast reactors are critical heat exchange components.
- Leakage in SG transfer tubes can cause dangerous sodium-water reactions, compromising reactor safety.
- Early detection of sodium-water reactions is essential for operational safety.
Purpose of the Study:
- To develop and validate a signal processing method for detecting steam generator leakage using an electromagnetic vortex flowmeter (EVFM).
- To enhance the safety of sodium-cooled fast reactors by enabling real-time monitoring of SG integrity.
Main Methods:
- Hydraulic experiments were conducted using water to simulate liquid sodium, with gas injection to mimic leaks.
- Electromagnetic vortex flowmeter (EVFM) sensor output signals were collected and analyzed in the time domain.
- A real-time signal processing method based on peak-to-peak standard deviation was developed and implemented on a digital signal processor (DSP) system.
Main Results:
- The developed signal processing method effectively detects bubbles in liquid sodium, indicative of leaks.
- Experiments in liquid sodium confirmed the system's effectiveness in identifying leaks.
- The system achieved a minimum detectable water leakage rate of 0.1 g/s.
Conclusions:
- The proposed signal processing method and hardware system provide a reliable means for detecting steam generator leakage in sodium-cooled fast reactors.
- This technology significantly improves the safety monitoring capabilities for nuclear reactors.
- The real-time detection of small leaks enhances the overall safety and operational integrity of the reactor system.
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