In this section
@article{Clarkson:2024:10.58286/29600,
author = {Clarkson, L and Zhang, Y and Cegla, F},
doi = {10.58286/29600},
journal = {11th European Workshop on Structural Health Monitoring Ewshm 2024},
title = {Development of a Real-Time Ultrasonic Monitoring Tool for High-Cycle Thermal Fatigue},
url = {http://dx.doi.org/10.58286/29600},
year = {2024}
}
TY - JOUR
AB - Pipe networks within nuclear power plants (NPPs) are susceptible to high-cycle thermal fatigue (HCTF) failures, especially in so-called mixing zones where fluids with different thermal and hydraulic properties interact. The 1998 incident at Civaux 1 NPP is a good example of such a failure and its potential consequences. Given the critical impact on the safety of these NPP components, a non-invasive method for HCTF progression monitoring in real-time is expected to be of great use. Previous ultrasonic monitoring work showed that it is possible to predict the through-thickness temperature distribution and its temporal evolution of a mild steel block to within ±2 °C, relative to a resistance temperature detector. These predictions were achieved using time-of-flight measurements from an ultrasonic transducer placed on the accessible surface with the so-called inverse thermal model (ITM) to invert the data. However, experiments to date have been limited to slow (10-minute) thermal transients at low temperatures (T < 100 °C). Given that HCTF is driven by thermal gradients, the ITM method seems promising to monitor its progression. In this work the performance of the ITM method was investigated under more realistic conditions: faster (1-minute) thermal transients at higher temperatures (≈ 250-300 °C). A special high-temperature electromagnetic acoustic transducer (EMAT) and a fast acquisition and inversion methodology were created to collect the data. The measurement set-up and the collected data will be presented in this paper.
AU - Clarkson,L
AU - Zhang,Y
AU - Cegla,F
DO - 10.58286/29600
PY - 2024///
TI - Development of a Real-Time Ultrasonic Monitoring Tool for High-Cycle Thermal Fatigue
T2 - 11th European Workshop on Structural Health Monitoring Ewshm 2024
UR - http://dx.doi.org/10.58286/29600
ER -