[en] The Steam Generator Group Project (SGGP) is using the retired-from-service Surry 2A pressurized water reactor steam generator as a test bed to investigate the reliability and effectiveness of inservice nondestructive eddy current inspection equipment and procedures. The information developed will provide the technical basis for updating the Regulatory Guides governing inservice inspection and tube plugging criteria of steam generators. This report describes Task 9 of the multi-task project. The objective of Task 9 was to plan, perform and analyze results of four round robin nondestructive examinations on a subset of tubes from the Surry generator. A description of the objectives, conduct and analysis of results for each round robin is presented. Validation of inspection results will be provided by removal of specimens from the generator for destructive and out-of-generator characterization (in progress). Preliminary comparisons of the inspection results in terms of agreement among teams of defect detection and sizing are given for each round robin. The majority of indications were reported at the hot leg top of the tube sheet. The best results on detection agreement ranged between 70 and 90 percent, but reported defect sizes varied significantly between teams for all round robins. The variability in detection and sizing appears to be due to analyst interpretation of the complex eddy current signals rather than differences in inspection equipment. 5 refs., 20 figs., 33 tabs