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- W1519399366 abstract "This report documents work performed at Pacific Northwest Laboratory on the effect of frequency domain equipment interactions on the reliability of ultrasonic inservice inspection. The primary focus of this work is to provide information to the United States Nuclear Regulatory Commission on the acceptability of equipment parameter tolerances as given in the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code Section 11 Appendix 8. Mathematical models were developed for the entire ultrasonic inspection system including sound propagation through the inspection sample. The models were used to determine worst-case inspection scenarios for thin sections (piping), and these worst-case inspection scenarios were then used in sensitivity studies to determine the suitability of equipment parameter tolerances. Ultrasonics literature was reviewed to find worst-case inspection scenarios outside the scope of the model used, but none that were significantly worse were found. Experiments were performed to confirm the important modeling results. Methods for reducing parameter sensitivity such as the use of a phase insensitive receive were also investigated. The model predicted that ASME Code tolerances for equipment bandwidth are acceptable, but tolerances for center frequency are too broad to provide reliable inspection of worst-case defects using narrow band systems. Experiments confirmed themore » basic trends predicted by the model, but the model seems to be conservative in that it shows greater sensitivity than is found empirically.« less" @default.
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- W1519399366 date "1992-06-01" @default.
- W1519399366 modified "2023-09-23" @default.
- W1519399366 title "Development of equipment parameter tolerances for the ultrasonic inspection of steel components: Application to components up to 3 inches thick. Volume 1" @default.
- W1519399366 hasPublicationYear "1992" @default.
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