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Vol.5 No.1 previous AA SP9 (59-60-61-62-63-64-65-66)-67-NT 56 -57

Academic Articles
Regular Paper Vol.5No.2 (2013) p.101 - p.112
 

Determination of High-Risk Zones for Local Wall Thinning due to Flow-Accelerated Corrosion

 
Shunsuke UCHIDA 1,*, Masanori NAITOH1, Hidetoshi OKADA1, Hiroaki SUZUKI1, Yoshiyuki TSUJI2, Seiichi KOSHIDUKA3 and Derek H.LISTER4
 
1Institute of Applied Energy, 1-14-2 Nishi-Shimbashi, Minato-ku, Tokyo 105-0003, Japan
2Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
3University of Tokyo7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
4University of New Brunswick, PO Box 4400, Fredericton, NB, Canada, E3B 5A3
 
Abstract
Thousands of flow-accelerated corrosion (FAC)-possible zones cause long and costly inspection procedures for nuclear power plants as well as fossil power plants. In order to narrow down the number of inspection zones, a speedy and easy-to-handle tool for determination of FAC risk zones, a 1D FAC code, was developed. FAC risk was defined as the mathematical product of the possibility of wall thinning occurrence and its hazard scale. The local maximum thinning rate could be predicted with accuracy within a factor of 2 with the 1D FAC code. High FAC risk zones and high priority locations for thinning monitoring along entire cooling systems and the effects of countermeasures on mitigating the risks could be evaluated within a small amount of computer time. The fusion of prediction and monitoring might go well to improve plant performance.
 
Keywords
FAC, wall thinning, monitoring, mass transfer coefficient, temperature, pH, O2, risk analysis
 
Full Paper: PDF EJAM Vol.5No.2 pp.101-112 "Determination of High-Risk Zones for Local Wall Thinning due to Flow-Accelerated Corrosion "
















Article Information
Article history:
Received 5 November 2012
Accepted 3 June 2013