Flow accelerated corrosion (FAC) is a major issue for aging of carbon steel piping system such as secondary sides of NPPs. An equipotential switching direct current potential drop (ES-DCPD) method was developed to monitor the thickness of piping that covers area instead of points unlike ultrasonic technique (UT). Hence it covers wide range of piping at one time and takes less monitoring time. In this paper, two accelerated FAC phenomenon; 23.7% thinning in 216.7 hrs and 51.4% thinning in 795 hrs are discussed. These were monitored by both ES-DCPD as well as UT. To accelerate FAC process water chemistry parameters were controlled and monitored. As sensitive factors on FAC, temperature and pH were changed during the test, the wall loss monitored results successfully reflected these changes. These results were also found in agreement with predication model.
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ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference
July 18–22, 2010
Bellevue, Washington, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-49255
PROCEEDINGS PAPER
Inspection of Piping Wall Loss With Flow Accelerated Corrosion Accelerated Simulation Test Available to Purchase
Kyung Ha Ryu,
Kyung Ha Ryu
Seoul National University, Seoul, Republic of Korea
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Ji Hak Kim,
Ji Hak Kim
Seoul National University, Seoul, Republic of Korea
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Il Soon Hwang
Il Soon Hwang
Seoul National University, Seoul, Republic of Korea
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Kyung Ha Ryu
Seoul National University, Seoul, Republic of Korea
Ji Hak Kim
Seoul National University, Seoul, Republic of Korea
Il Soon Hwang
Seoul National University, Seoul, Republic of Korea
Paper No:
PVP2010-25501, pp. 1233-1241; 9 pages
Published Online:
January 10, 2011
Citation
Ryu, KH, Kim, JH, & Hwang, IS. "Inspection of Piping Wall Loss With Flow Accelerated Corrosion Accelerated Simulation Test." Proceedings of the ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASME 2010 Pressure Vessels and Piping Conference: Volume 6, Parts A and B. Bellevue, Washington, USA. July 18–22, 2010. pp. 1233-1241. ASME. https://doi.org/10.1115/PVP2010-25501
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