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http://dx.doi.org/10.14773/cst.2015.14.6.325

Analysis of Pipe Wall-thinning Caused by Water Chemistry Change in Secondary System of Nuclear Power Plant  

Yun, Hun (KEPCO E&C)
Hwang, Kyeongmo (KEPCO E&C)
Moon, Seung-Jae (Mechanical Department, Hanyang University)
Publication Information
Corrosion Science and Technology / v.14, no.6, 2015 , pp. 325-330 More about this Journal
Abstract
Pipe wall-thinning by flow-accelerated corrosion (FAC) is a significant and costly damage of secondary system piping in nuclear power plants (NPPs). All NPPs have their management programs to ensure pipe integrity from wall-thinning. This study analyzed the pipe wall-thinning caused by changing the amine, which is used for adjusting the water chemistry in the secondary system of NPPs. The pH change was analyzed according to the addition of amine. Then, the wear rate calculated in two different amines was compared at the steam cycle in NPPs. As a result, increasing the pH at operating temperature (Hot pH) can reduce the rate of FAC damage significantly. Wall-thinning is affected by amine characteristics depending on temperature and quality of water.
Keywords
flow-accelerated corrosion; wall-thinning; water chemistry;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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