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99353 RECENT DEVELOPMENTS IN MEASUREMENT AND EVALUATION OF FAC DAMAGE IN POWER PIANTS

Product Number: 51300-99353-SG
ISBN: 99353 1999 CP
Author: Yogendra S. Garud, Phil Besuner, and Marvin J. Cohn
Industry: Energy Generation
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This paper describes some recent developments in the measurement and evaluation of flow-accelerated corrosion (FAC) damage in power plants. The evaluation focuses on data checking and smoothing to account for gross errors, noise, and uncertainty in the wall thickness measurements from ultrasonic or pulsed eddy-current data. Also, the evaluation method utilizes advanced regression analysis for spatial and temporal evolution of the wall loss, providing statistically robust predictions of wear rates and associated uncertainty. Results of the application of these new tools are presented for several components in actual service. More importantly, the practical implications of using these advances are discussed in relation to the likely impact on the scope and effectiveness of FAC related inspection programs.
This paper describes some recent developments in the measurement and evaluation of flow-accelerated corrosion (FAC) damage in power plants. The evaluation focuses on data checking and smoothing to account for gross errors, noise, and uncertainty in the wall thickness measurements from ultrasonic or pulsed eddy-current data. Also, the evaluation method utilizes advanced regression analysis for spatial and temporal evolution of the wall loss, providing statistically robust predictions of wear rates and associated uncertainty. Results of the application of these new tools are presented for several components in actual service. More importantly, the practical implications of using these advances are discussed in relation to the likely impact on the scope and effectiveness of FAC related inspection programs.
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