Evaluation of the Ultrasonic Data Recording and Processing System (UDRPS). Final report

An evaluation of Dynacon Systems, Inc. Ultrasonic Data Recording and Processing System (UDRPS) was conducted by the EPRI NDE Center. One of the features of UDRPS is its automatic flaw detection software. This flaw detection capability was evaluated for near-surface and embedded defects and compared to results obtained by several inspection teams. Nine specimens were used for the evaluation. Six of these with almost ninety defects were for the near-surface defect evaluation, the remaining three specimens with over thirty defects were for embedded defect evaluation. With these sample sizes, defect detection probabilities of 0.95 for near-surface defects and 0.89 for embedded defects were obtained at 95% confidence level. For sizing of defects RMS errors of 0.12 inches for near-surface defects and 0.14 inches for embedded defects were obtained. This evaluation was limited to measuring the flaw detection and sizing capabilities of UDRPS with particular ultrasonic techniques. 14 refs., 30 figs.