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논문 기본 정보

자료유형
학술대회자료
저자정보
정인철 (두산중공업) 김용재 (두산중공업) 심덕남 (두산중공업)
저널정보
대한용접·접합학회 대한용접학회 특별강연 및 학술발표대회 개요집 대한용접접합학회 2010년도 춘계 학술발표대회 초록집 제53권
발행연도
2010.5
수록면
43 - 46 (4page)

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As the nuclear power plant has been constructed continuously for several decades in Korea, the welding technology for components manufacturing and installation has been improved largely. Standardization for weld test and qualification was also established systematically according to the concerned code. The welding for the main components requires the high reliability to keep the constant quality level, which means the repeatability of weld quality. Therefore the weld process qualified by thorough test and evaluation is able to be applied for manufacturing. Narrow gap SAW and GTAW process are usually applied for girth seam welding of pressure vessel like Reactor vessel, steam generator, and etc. For the surface cladding with stainless steel and Inconel material, strip welding process is mainly used. Inside cladding of nozzles is additionally applied with Hot wire GTAW and semi-auto welding process. Especially the weld joint having elliptical weld line on curved surface needs a specialized weld system which is automatically rotating with adjusting position of the head torch. The small sized pipe, tube, and internal parts of reactor vessel requests precise weld processes like an automatic GTAW and electron beam welding. Welding of dissimilar materials including Inconel690 material has high possibility of weld defects like a lack of fusion, various types of crack. To avoid these kinds of problem, optimum weld parameters and sequence should be set up through the many tests. As the life extension of nuclear power plant is general trend, weld technologies having higher reliability is required gradually. More development of specialized welding systems, weld part analysis and evaluation, and life prediction for main components should be taken into a consideration extensively.

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Abstract
1. 서론
2. 주요 용접공정
3. 수명향상 용접기술
4. 결론

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UCI(KEPA) : I410-ECN-0101-2010-581-002948802