원자력발전소 2차측 습증기계통 주요지점별 부식 발생현황 분석
Analysis on Formation of Corrosion Products in Secondary Steam-Water System of Nuclear Power Plant
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Pipes and components of the secondary system in the pressurized water reactor (PWR) are mainly comprisedof manufactured carbon steel. Thus, the generated carbon steel corrosion products are transported into thesteam generator and deposited, thereby deteriorating the integrity of the steam generator. Environmentalcondition in the secondary system of the PWRs differs across different locations. So, the corrosion rateand types of corrosion products depend on specific locations in the secondary system. In this study, thequantity and chemical compositions of corrosion products generated in various locations that vary in differenttemperatures and chemistry conditions were investigated. As a result of evaluating the PWR “Unit A” thatis in current operation, the amount of corrosion products generated in the section of high temperature feedwatersystem was identified as the largest source in the secondary system. Major components of corrosion productswere iron oxides such as magnetite, hematite, and lepidocrocite.
Abstract
Pipes and components of the secondary system in the pressurized water reactor (PWR) are mainly comprisedof manufactured carbon steel. Thus, the generated carbon steel corrosion products are transported into thesteam generator and deposited, thereby deteriorating the integrity of the steam generator. Environmentalcondition in the secondary system of the PWRs differs across different locations. So, the corrosion rateand types of corrosion products depend on specific locations in the secondary system. In this study, thequantity and chemical compositions of corrosion products generated in various locations that vary in differenttemperatures and chemistry conditions were investigated. As a result of evaluating the PWR “Unit A” thatis in current operation, the amount of corrosion products generated in the section of high temperature feedwatersystem was identified as the largest source in the secondary system. Major components of corrosion productswere iron oxides such as magnetite, hematite, and lepidocrocite.
참고문헌 (6)
- Pressurized Water Reactor Secondary Water Chemistry Guidelines, Rev. 8, "K. Fruzzetti", Electric Power Research Institute, ~, pp.Product ID #3002010645 (2017)
- Flow-Accelerated Corrosion in Power Plants, Rev. 2, "R. Wolfe", Electric Power Research Institute, 6~11, pp.Product ID #3002008071 (2016)
- "ASTM D6301-13, Standard Practice for Collection of On-Line Composite Samples of Suspended Solids and Ionic Solids in Process Water", ~ (2013)
- U. Schwertmann, "The Iron Oxides in the Laboratory – Preparation and Characterization", pp.11~ (2000), WILEY-VCH
- K. Fruzzetti, , Proceedings: 2002 Workshop on Pressurized Water Reactor Elevated Feedwater Iron Transport (2002), Electric Power Research Institute
- R. M. Cornell, "The Iron Oxides –Structure, properties, Reactions, Occurences and Uses", pp.366~ (1996), WILEY-VCH