NDTnet 1998 Aug, Vol.3 No.8

Full-Text - Abstract

This paper presents a new method for in-service inspection in nuclear power plants, based on a new digital, X-ray camera system. The system called DART (Digital Advanced Radiographic Testing) is built upon new detection technique. In combination with the manipulator that is programmed to scan the volume of interest. The reconstruction is done by an algorithm (linear, filtered x-ray tomosynthesis). The technique is optimised for detection, characterization and sizing of IGSCC in piping systems. The detection technique has proved to have superior performance. The image quality is far beyond what is possible to reach by conventional filmbased technique. By making exposures from different orientations around the defect and then using the reconstruction algorithm to create a 3-D representation, the information from the crack is increased. The presentation of the result can be as traditional x-ray images, but it is also possible to present "B-scans" and "C-scans" of the crack similar to the presentation of ultrasonic data.

References
1. Hua Shoa et al., IEEE Transactions on Nuclear Science, Vol. 38, No. 2, April 1991, p. 845857.
2. Pavan P. Et al., Nuclear Instruments and Methods in Physics Research, A327 (1993), p. 600-604.
3. Hammar L., Proc. of the Joint CEC OECD IAEA Specialist Meeting, Petten, The Netherlands, 1997, p. 185-189.

Abstract Source:
Book of Abstracts, 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN: 87-986898-0-00

Full-Text Source:
Proceedings of the 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN:

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