원자력발전소 2차측 습증기계통 주요지점별 부식 발생현황 분석

• Published in: Corrosion science and technology Vol. 18; no. 4; pp. 138 - 147
• Main Authors: 이경희, Kyunghee Lee, 한호석, Hoseok Han, 신성용, Sungyong Shin, 성기방, Kibang Sung, 이영우, Youngwoo Rhee
• Format: Journal Article
• Language: Korean
• Published: 한국부식방식학회 31.08.2019
• Subjects: Carbon steel; Corrosion products; Hematite; Iron oxides; Magnetite; 금속공학; Hematite; Corrosion products; Carbon steel; Magnetite; Iron oxides
• ISSN: 1598-6462; 2288-6524
• DOI: 10.14773/cst.2019.18.4.138

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.