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Analysis of Wall-Thinning Effects Caused by Power Uprates in the Secondary System of a Nuclear Power Plant
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  • Journal title : Corrosion Science and Technology
  • Volume 15, Issue 3,  2016, pp.135-140
  • Publisher : The Corrosion Science Society of Korea
  • DOI : 10.14773/cst.2016.15.3.135
 Title & Authors
Analysis of Wall-Thinning Effects Caused by Power Uprates in the Secondary System of a Nuclear Power Plant
Yun, Hun; Hwang, Kyeongmo; Lee, Hyoseoung; Moon, Seung-Jae;
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 Abstract
Piping and equipment are degraded by flow-accelerated corrosion (FAC) in nuclear power plants. FAC causes numerous problems and nuclear utilities maintain programs to control FAC. The key parameters influencing FAC are hydrodynamic conditions, water chemistry, and effect of materials. Recently, a nuclear utility has planned slight power uprates in Korea. Operating conditions need to be changed in the secondary system according to power uprates. This study analyzed the effect of wall-thinning caused by power uprates. The change of operation data in the secondary cycle is reviewed, and wall-thinning rates are analyzed in the main lines. As a result, two phase (mixture of water and steam) lines have a greater impact than a water line under power uprate conditions. Also, the quality of steam is the most important factor for FAC in two phase lines.
 Keywords
flow-accelerated corrosion;wall-thinning;power uprates;
 Language
Korean
 Cited by
 References
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