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RESEARCH PAPERS

The Impact of NDE Unreliability on Pressure Vessel Fracture Predictions

[+] Author and Article Information
F. A. Simonen

Pacific Northwest Laboratory, Richland, Wash. 99352

J. Pressure Vessel Technol 107(1), 18-24 (Feb 01, 1985) (7 pages) doi:10.1115/1.3264395 History: Received August 30, 1984; Online November 05, 2009

Abstract

This paper reviews the significant variables of flaw depth, length, location and orientation required for fracture mechanics evaluations of pressure vessel integrity. Results of calculations emphasize pressurized thermal shock (PTS) and the significance of flaws located at or near the inside surface of the vessel. For PTS conditions, previous studies have shown that vessel failure probability is relatively insensitive to flaw depth. In this study the impact of flaw length is also evaluated. Results of other evaluation show the importance of accurately locating flaws by NDE. The influence of vessel cladding is emphasized, with the relative significance of flaws through the clad and at various depths below the clad being addressed.

Copyright © 1985 by ASME
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