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Anomaly detection technique based on acoustic measurement for sodium-cooled fast reactor

Aizawa, Kosuke ; Ueki, Yoshitaka*

Early detection of an anomaly greatly enhances the safety of nuclear power plants. A detection system called an acoustic measurement has high responsiveness, because sound produced by the anomaly is transmitted from the place at which an anomaly has occurred to a measurement point at a speed of sound, and the acoustic measurement has the potential to directly detect the physical quantity of an anomaly at its occurrence point. For sodium-cooled fast reactors, we have been developing an anomaly detection technique using the acoustic measurement that offers these features. This paper clarifies issues in applying the acoustic measurement to a sodium-cooled fast reactor, how we solve the issues, and the current status of this research.

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