Eddy-Current Testing and Analysis of a Sample of Zircaloy Fuel Cladding for the OECD Halden 'Round-Robin' Exercise (Phase II)

摘要

Two samples of Zircaloy fuel cladding were supplied, one containing pre-measured defects of known type and size, and the other containing unknown defects. Eddy-current testing techniques were used to ascertain the nature of the unknown defects. By using a high resolution encircling coil and a probe coil and then processing digitally the data with specially prepared software, nine internal defects, of volume 0.18 to 0.86 mm sup 3 were located positively and identified, despite interference from heavily fluctuating background signals. (ERA citation 13:015764)