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

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

O - Ostatní výsledky

CEP obor

JF - Jaderná energetika

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů