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Code Case N-931 and UNSM Technology for the Improving Service Life and Safety of Nuclear Power Plant
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- 통권
- Proceedings of THE 2nd INTERNATIONAL CONFERENCE OF HYOJEONG ACADEMY 2023 (2023.08)바로가기
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- 페이지
- pp.50-54
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- 저자
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- 언어
- 영어(ENG)
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- URL
- https://www.earticle.net/Article/A489215
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원문정보
초록
- 영어
- Following the inquiry “What requirements may be used for performance and qualification criteria of surface stress improvement processes (SSIP) to mitigate the potential for stress corrosion cracking (SCC) for Section III, Division 1 and 3 items?” The code case N-931 “Performance and Qualification Criteria for Mitigation of Stress Corrosion Cracking by Surface Stress Improvement: Section III, Division 1 and 3’ was developed since 2017 by the task group “Advanced Surface Stress Improvement Technology” in Korea International Working Group of ASME (American Society of Mechanical Engineers). This case provides performance and qualification criteria for the pre-service application of a surface stress improvement process (SSIP) to Section III Division 1 and 3 items potentially susceptible to SCC, as a means to prevent crack initiation. Mitigation of items to the requirements of this case does not modify or change the in-service inspection (ISI) requirements for those items. Items with base material potentially susceptible to SCC due to environmental conditions that have been identified in the design specification, as required by NCA-3211.19(b) (Division 1) or by WA-3351.2 (Division 3). Items with weld material potentially susceptible to SCC due to tensile residual stresses caused by weld repairs at the wetted surface. Paragraphs NB- 4451, NCD-4451, and NG-4451 prohibit weld repairs on the wetted surface of items susceptible to SCC unless a mitigation action is applied. This Code Case is to be used for surface stress improvement processes such as ultrasonic nanocrystal surface modification (UNSM), water jet peening, or laser peening that satisfy the performance criteria and qualification criteria defined in this case. Two major technical bases for this code case are PVP2022-85151 and EPRI Report 3002018458. Brief summary of UNSM technology and two technical bases is introduced.
목차
Abstract
1. Introduction
2. Surface Stress Improvement Processes
2.1. UNSM technology
2.2. Water Jet Peening technology
2.3. Laser Peening technology
3. Development of a Code Case for Application of SSIP
4. Conclusions
References
키워드
ASME Code Case SSIP (surface stress improvement process) UNSM (ultrasonic nanocrystal surface modification) SCC (stress corrosion cracking) SMR (small modular reactor)저자
간행물 정보
발행기관
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- 발행기관명
- 선문효정학술연구회 [Sun Moon Hyojeong Academy Society]
- 설립연도
- 2023
- 분야
- 복합학>학제간연구
- 소개
- Journal of Hyojeong Academia aims to serve as a global platform where researchers and scholars of various disciplines can contribute ideas for our sustainable global community of Co‐existence, Co‐prosperity, and Co‐righteousness. The journal is a multidisciplinary, open‐access, internationally peer‐reviewed academic journal, and it invites all areas of research conducted in the spirit of post materialism including studies centering on God, studies unifying religions and sciences, and studies on all aspects of Co‐existence, Co‐prosperity, and Co‐righteousness.
간행물
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- 간행물명
- 선문효정학술연구회 학술대회 프로시딩
- 간기
- 반년간
- 수록기간
- 2023~2026
- 십진분류
- KDC 238 DDC 289
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