NDTnet 1998 Aug, Vol.3 No.8

Abstract

The AUGUR-family of portable computer-based nondestructive testing systems has been designed to solve wide range problems connected with the visualization and characterization of defects that have been preliminary detected by means of traditional flaw detection instruments.Reproduction of high-quality images of defects is provided by the use of powerful methods for coherent processing of echo-signals. High resolution permits more exact determination of defect coordinates, sizes and orientation both for pearlitic and austenitic type welds and, hence, guarantees well-grounded defect acceptability assessments.

The AUGUR 4.2 computer-based system, the tool for expert in-service inspection, since 1996 is used for examination of primary circuit weldments of Russian NPPs. Some results of inspections in 1996, including comparative analysis of AUGUR and manual inspection data, have been presented earlier [1, 2]. The systematization as well as new results are discussed.
In order to take advantages of AUGUR 4.2 potentialities in full measure advanced methods of defect assessments should be applied using computer modelling and software developments. Strength maintenance involving AUGUR-family data is based on special methodical adaptations to the specific objects (pearlitic piping with austenitic cladding, repaired area, or austenitic pipes), computer modelling of weldment stress state (including residual stress formation and redistribution), computer-based procedure of defect assessments using the precise data on defect geometry. The defect assessment software and necessary data are integrated with the AUGUR system to provide well-timed and well-grounded estimations, minimize subjective factor influence, prevent loss or corruption of input-output data.

References:
1. Arjaev A., Kiselyov V, Bougaenko S., Strelkov B., Badalian V, Vopilkin A. Safety significance of Augur-4.2 on-site application at RBMK NPPs. In: NDE Techniques Capability Demonstration and Inspection Qualification. Proc. of the Joint EC OECD IAEA Specialists Meeting, 1997: 251-259.
2. . Arjaev A., Kiselyov V, Badalian V, Vopilkin A., Strelkov B., Vanukov V, Aladinsky V, Makhanev V Field application of Augur ultrasonic system during R~ NPP unit ISI and its impact on pressure boundary integrity. In: Ageing of Materials and Methods for the Assessments of Lifetimes of Engineering Plant, Proc. of the 4th Int. Colloq., 1997:

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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