원전 고온 1차수 환경에서 응력부식균열의 실시간 마이크로 스케일 관찰 방법 개발
Development of Method for In-situ Micro-Scale Observation of Stress Corrosion Cracking in High-Temperature Primary Water Environment
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
The aim of this study was to develop a new in-situ observation method and instrument in micro-scale to investigate the mechanism of stress corrosion cracking (SCC) initiation of Ni-base alloys in a high temperature water environment of pressurized water reactors (PWRs). A laser confocal microscope (LCM), an autoclave with diamond window view port, and a slow strain-rate tester with primary water circulation loop system were components of the instrument. Diamond window, one of the core components of the instrument, was selected based on its optical, chemical, and mechanical properties. LCM was used to observe the specimen in micro-scale, considering the experimental condition of a high-temperature primary water environment. Using in-situ method and instrument, it is possible to observe oxidation and deformation of specimen surface in micro-scale through the diamond window in a high-temperature primary water in real-time. The in-situ method and instrument developed in this work can be utilized to investigate effects of various factors on SCC initiation in a high-temperature water environment.
Abstract
The aim of this study was to develop a new in-situ observation method and instrument in micro-scale to investigate the mechanism of stress corrosion cracking (SCC) initiation of Ni-base alloys in a high temperature water environment of pressurized water reactors (PWRs). A laser confocal microscope (LCM), an autoclave with diamond window view port, and a slow strain-rate tester with primary water circulation loop system were components of the instrument. Diamond window, one of the core components of the instrument, was selected based on its optical, chemical, and mechanical properties. LCM was used to observe the specimen in micro-scale, considering the experimental condition of a high-temperature primary water environment. Using in-situ method and instrument, it is possible to observe oxidation and deformation of specimen surface in micro-scale through the diamond window in a high-temperature primary water in real-time. The in-situ method and instrument developed in this work can be utilized to investigate effects of various factors on SCC initiation in a high-temperature water environment.
참고문헌 (14)
- D. Feron, "Stress Corrosion Cracking of Nickel Based Alloys in Water-cooled Nuclear Reactors:The Coriou Effect", pp.3~24 (2016), Woodhead Publishing
- P. L. Andresen, "Detection of SCC initiation in BWR environment by electrochemical noise", 8th Interntaional Conference on Environmental Degradation of Materials in Nuclear Power Systems–Water Reactors (1998)
- Ziqing Zhai, "Stress corrosion crack initiation of alloy 600 in PWR primary water", Corrosion Science, 123, pp.76~87 (2017), Elsevier BV[DOI]
- Danbi Song, "In Situ Investigation of Intergranular Stress Corrosion Cracking Initiation and Coalescence and Effects of Geometric and Microstructural Characteristics", CORROSION, 74(12), pp.1385~1394 (2018), Association for Materials Protection and Performance (AMPP)[DOI]
- 전건우, "New test method for real-time measurement of SCC initiation of thin disk specimen in high-temperature primary water environment", Nuclear Engineering and Technology, 54(12), pp.4481~4490 (2022), 한국원자력학회[DOI]
- 김태영, "고온 고압 응력부식균열 개시 시험용 디스크 시편의 응력과 변형에 대한 유한요소 해석", CORROSION SCIENCE AND TECHNOLOGY, 22(1), pp.44~54 (2023), 한국부식방식학회[DOI]
- "SSRT facility for in-situ observation of irradiated materials in high temperature water" (2003)[URL]
- Takuya FUKUMURA, "Development of an autoclave with zirconia windows for in-situ observation of sample surface under the primary water conditions of pressurized water reactors", Journal of nuclear science and technology, 39(3), pp.276~278 (2002), Informa UK Limited[DOI]
- Ji Hyun Kim, "Development of an in situ Raman spectroscopic system for surface oxide films on metals and alloys in high temperature water", Nuclear Engineering and Design, 235(9), pp.1029~1040 (2005), Elsevier BV[DOI]
- Robin M. Pope, "Absorption spectrum (380–700 nm) of pure water II Integrating cavity measurements", Applied Optics, 36(33), pp.8710~ (1997), Optica Publishing Group[DOI]
- "Diamond Materials GmbH Inc"[URL]
- Claude A. Klein, "Young's modulus and Poisson's ratio of CVD diamond", Diamond and Related Materials, 2(5-7), pp.918~923 (1993), Elsevier BV[DOI]
- "Esco Optics Inc"[URL]
- M. Dhondt, "Characterization of intergranular stress corrosion cracking behavior of a FSW Al-Cu-Li 2050 nugget", Mechanics & Industry, 16(4), pp.401~ (2015), EDP Sciences[DOI]