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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 이영우
- 발행연도
- 2020
- 저작권
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초록· 키워드
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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. The six points of the secondary system were selected for the PWR “Unit A” currently in operation, and the characteristics of corrosion products were analyzed by each point. The six points were Final feedwater(FW), Condensate polishing plant(CPP) outlet, Low pressure(LP) heater outlet, Heater drain tank(HDT) drain, Moisture separator&reheater(MSR) drain, and Steam generator(SG) blowdown. As a result of evaluating the PWR “Unit A”, 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.
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. The six points of the secondary system were selected for the PWR “Unit A” currently in operation, and the characteristics of corrosion products were analyzed by each point. The six points were Final feedwater(FW), Condensate polishing plant(CPP) outlet, Low pressure(LP) heater outlet, Heater drain tank(HDT) drain, Moisture separator&reheater(MSR) drain, and Steam generator(SG) blowdown. As a result of evaluating the PWR “Unit A”, 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.
목차
제1장 서론 1제2장 이론적 고찰 41. 2차계통 부식 영향인자 41-1. 수력학적 인자 71-2. 금속학적 인자 91-3. 수화학적 인자 112. 부식생성물 종류별 특성 162-1. 마그네타이트(Magnetite) 182-2. 헤머타이트(Hematite) 202-3. 괴타이트(Goethite) 212-4. 레피도크로사이트(Lepidocrocite) 22제3장 실험 251. 평가대상 발전소 252. 평가지점 선정 273. 평가시료 채취 및 분석 33제4장 결과 및 고찰 371. 2차계통 부식 발생현황 분석 371-1. 부식 발생량 분석 371-2. 부식생성물 물질수지 평가 402. 부식생성물 조성 분석 482-1. XRD 분석 482-2. SEM/EDS 분석 553. 수화학 관리인자 최적화 방법 633-1. pH 영향 643-2. 산화-환원전위 영향 66제5장 결론 67참고문헌 68Abstract 72
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