A Fracture Mechanics Interpretation Model for Acoustic Emission Signals Caused by Thermal Fatigue Shocking on a Reactor Pressure Vessel Nozzle

A Fracture Mechanics Interpretation Model for Acoustic Emission Signals Caused by Thermal Fatigue Shocking on a Reactor Pressure Vessel Nozzle

The analysis of acoustic emission measurements during cyclic thermal-shock tests on a pressure vessel nozzle (HDR) with cracks indicated a time-dependent emission of signals that partially contradicts the usual fracture mechanics approach (according to Paris). If one assumes a time-dependent corrosi...

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Veröffentlicht in:Nuclear engineering and design 1985-08, Vol.94 (3), p.357-363
Hauptverfasser: Neubrech, G E, Deuster, G, Walte, F, Jansky, J, Schmitt, W
Format: Artikel
Sprache:eng
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Zusammenfassung:The analysis of acoustic emission measurements during cyclic thermal-shock tests on a pressure vessel nozzle (HDR) with cracks indicated a time-dependent emission of signals that partially contradicts the usual fracture mechanics approach (according to Paris). If one assumes a time-dependent corrosion crack growth (normally of secondary importance) as the dominating factor of influence, a qualitatively good agreement between acoustic emission and fracture mechanics is achieved. 5 ref.--AA
ISSN:0029-5493