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일차수응력부식균열(PWSCC) 및 염화이온부식균열(CISCC) 저감용 표면개질기술 적용을 위한 코드케이스 개발
조성우,편영식,Nick Mohr,Jon Tatman,John Broussard,Jean Collin,이원근,오은종,장동현,구경회,황성식,최선웅,홍현욱 한국압력기기공학회 2019 한국압력기기공학회 논문집 Vol.15 No.1
In nuclear power plant operation and spent fuel canisters, it is necessary to provide a sound technical basis for the safety and security of long-term operation and storage respectively. Recently, the peening technology is being discussed and the technology will be adopted to ASME Section III, Division 1, Subsection NX (2019 Edition). The peening is prohibited in current edition, but it will be approved in 2019 Edition and adopted. However, Surface stress improvement techniques such as the peening is used to mitigate SCC susceptible in operating nuclear plants. Although the peening will be approved to ASME CODE, there are no performance criteria listed in the 2019 edition. The Korean International Working Group (KIWG) formed a new Task Group named “Advanced Surface Stress Improved Technology”. The task group will develop a CODE CASE to address PWSCC(Primary Water Stress Corrosion Cracking) and CISCC(Chloride Induced Stress Corrosion Cracking) for new ASME Section III components. TG-ASSIT was started to make peening performance criteria for ASME Section III (new fabrication) applications. The objective of TG-ASSIT is to gain consensus among the relevant Code groups that requirements/mitigation have been met.