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          NRC Library  Document Collections  NUREG-Series Publications  Publications Prepared by NRC ContractorsA Comparison of Three Round Robin Studies on ISI Reliability of Wrought Stainless Steel Piping (NUREG/CR-6795)

On this page: Publication Information AbstractDownload complete document NUREG/CR-6795 (PDF - 3.36 MB)Publication Information **Manuscript Completed:** September 2002**Date Published:** February 2003 **Prepared by:** P. G. Heasler, S. R. Doctor Pacific Northwest National Laboratory Richland, WA 99352 D. A. Jackson, NRC Project Manager NRC Job Code Y6604 **Prepared for**: Division of Engineering Technology Office of Nuclear Regulatory Research U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Availability Notice Abstract The Pacific Northwest National Laboratory (PNNL) is conducting a multi-year program sponsored by the Nuclear Regulatory Commission (NRC) to address issues related to the reliability of ultrasonic testing (UT) and the development of improved programs for inservice inspection (ISI). This includes establishing the accuracy and reliability of UT methods for ISI of light water reactor components. From 1981 through 1990, three major round robin studies were conducted to quantify the capability of ISI inspectors to detect cracks in wrought stainless steel, and their accuracy in crack sizing. This report concentrates on analysis techniques to estimate comparable ISI detection and sizing statistics from the three round robins. This analysis provides a tool for evaluating the effect of technological advances in UT capability during the 1980s, and to assess combining the data from the three studies to form a better overview of inspection performance. 
      
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