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U.S. Department of Energy
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Comparative evaluation of acoustic holography systems: Topical report

Technical Report ·
OSTI ID:6582453
The Sigma Research, Inc. SDL-1000 Acoustic Holography Imaging System developed under RP 606 was evaluated by the EPRI NDE Center. A preliminary evaluation completed in early 1986 included measuring the system performance for unclad surface inspections of the Program for the Inspection of Steel Components-II (PISC-II) Plate No. 2 and the Combustion Engineering (CE) plate and comparing it with the results of multifrequency holography system. Based on the preliminary investigation, a cooperative project between EPRI and the Babcock and Wilcox (B and W) Owners' Group was initiated to provide direction for possible future development efforts in acoustical holography. The project included the evaluation of the Sigma Research's SDL-1000 and the B and W's acoustical holography system. The project tasks were: an evaluation of the B and W Relative Partial Sums (RPS) procedure for setting the plotting threshold for reconstructed holographic images; re-analysis of the available 2 MHz data using the RPS procedure; collection of 5 MHz holographic data on the flaws in the CE slab; analysis of the 5 MHz data using the RPS procedure; and destructive sectioning of flaws in the CE plate to validate the RPS procedure for setting the image threshold and to compare acoustical holography system performance.
Research Organization:
EPRI Nondestructive Evaluation Center, Charlotte, NC (USA); Electric Power Research Inst., Palo Alto, CA (USA)
OSTI ID:
6582453
Report Number(s):
EPRI-NP-5130; ON: TI87920415
Country of Publication:
United States
Language:
English