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http://dx.doi.org/10.14773/cst.2019.18.4.138

Analysis on Formation of Corrosion Products in Secondary Steam-Water System of Nuclear Power Plant  

Lee, Kyunghee (Department of Chemical Engineering and Applied Chemistry, Chungnam National University)
Han, Hoseok (Central Research Institute, Korea Hydro & Nuclear Power Co., Ltd.)
Shin, Sungyong (Central Research Institute, Korea Hydro & Nuclear Power Co., Ltd.)
Sung, Kibang (Central Research Institute, Korea Hydro & Nuclear Power Co., Ltd.)
Rhee, Youngwoo (Department of Chemical Engineering and Applied Chemistry, Chungnam National University)
Publication Information
Corrosion Science and Technology / v.18, no.4, 2019 , pp. 138-147 More about this Journal
Abstract
Pipes and components of the secondary system in the pressurized water reactor (PWR) are mainly comprised of manufactured carbon steel. Thus, the generated carbon steel corrosion products are transported into the steam generator and deposited, thereby deteriorating the integrity of the steam generator. Environmental condition in the secondary system of the PWRs differs across different locations. So, the corrosion rate and types of corrosion products depend on specific locations in the secondary system. In this study, the quantity and chemical compositions of corrosion products generated in various locations that vary in different temperatures and chemistry conditions were investigated. As a result of evaluating the PWR "Unit A" that is in current operation, the amount of corrosion products generated in the section of high temperature feedwater system was identified as the largest source in the secondary system. Major components of corrosion products were iron oxides such as magnetite, hematite, and lepidocrocite.
Keywords
Carbon steel; Corrosion products; Iron oxides; Magnetite; Hematite;
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