Time-Frequency Localization of Loose Parts in Nuclear Power Plants Based on Comparison with Lamb Waves

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F11%3A43898233" target="_blank" >RIV/49777513:23520/11:43898233 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Time-Frequency Localization of Loose Parts in Nuclear Power Plants Based on Comparison with Lamb Waves
Original language description
A fundamental monitoring system in nuclear power plants is the so called loose part monitoring system (LPMS). Its primary goal is the detection of loose parts (such as rivets, nuts, ...), that can drift along the coolant flow and cause damage to the coolant system components, leading to power plant failure. One of the main tasks is the localization of the loose part impacts in order to identify the loose part and trace its motion in the system. Current methods based on vibration signal processing in thetime domain are relatively inaccurate in localizing weaker impacts. In this paper, Lamb surface waves are reconstructed from measured vibration signals and used for impact localization. Wave propagation in component materials has a dispersive character,which is detectable in the time-frequency representation of the signal. Therefore, time-frequency analysis is used to compute the stress wave propagation.
Czech name
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Czech description
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Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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