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- W2799896261 abstract "Pressure tube fabrication and installment challenges combined with natural sagging over time can produce issues with probe alignment for pressure tube inspection of the primary circuit of CANDU reactors. The ability to extract accurate defect depth information from poorly focused ultrasonic signals would reduce additional inspection procedures, which leads to a significant time and cost saving. Currently, the defect depth measurement protocol is to simply calculate the time difference between the peaks of the echo signals from the tube surface and the defect from a single element probe focused at the back-wall depth. When alignment issues are present, incorrect focusing results in interference within the returning echo signal. This paper proposes a novel wavelet analysis method that employs the Haar wavelet to decompose the original poorly focused A-scan signal and reconstruct detailed information based on a selected high frequency component range within the bandwidth of the transducer. Compared to the original signal, the wavelet analysis method provides additional characteristic defect information and an improved estimate of defect depth with errors less than 5%." @default.
- W2799896261 created "2018-05-17" @default.
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- W2799896261 date "2018-01-01" @default.
- W2799896261 modified "2023-09-23" @default.
- W2799896261 title "Wavelet analysis of poorly-focused ultrasonic signal of pressure tube inspection in nuclear industry" @default.
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- W2799896261 doi "https://doi.org/10.1063/1.5031628" @default.
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