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논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2015.11
- 수록면
- 3,402 - 3,406 (5page)
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As operating period of older vintage nuclear power plants increases, many multiple cracks have been found in steam generator tubes made of Alloy600MA, thus a robust predictive model for either burst pressure or coalescence pressure of these multiple cracks in steam generator tubes is highly required. Nothing that steam generator tubes are typically failed by plastic collapse, the crack alignment and combination rules considering this material characteristic of steam generator tubes should be suggested.
The objective of this paper is to predict the plastic collapse pressures of non-aligned dual cracks and to propose coalescence criterion based on detailed 3-dimensional (3D) elastic-plastic finite element (FE) analyses. The geometric variables of non-aligned multiple crack in steam generator tubes affecting burst or coalescence pressure, i.e. circumferential and longitudinal distances between two cracks and crack length of each crack, are systematically varied. Using the present FE results, the crack interaction effect of non-aligned multiple cracks are assessed and new alignment and combination criteria of non-aligned multiple cracks of steam generator tubes are also proposed.
The objective of this paper is to predict the plastic collapse pressures of non-aligned dual cracks and to propose coalescence criterion based on detailed 3-dimensional (3D) elastic-plastic finite element (FE) analyses. The geometric variables of non-aligned multiple crack in steam generator tubes affecting burst or coalescence pressure, i.e. circumferential and longitudinal distances between two cracks and crack length of each crack, are systematically varied. Using the present FE results, the crack interaction effect of non-aligned multiple cracks are assessed and new alignment and combination criteria of non-aligned multiple cracks of steam generator tubes are also proposed.
목차
Abstract
1. 서론
2. 평가 방법론
3. 3차원 유한요소 해석
4. 해석 결과
5. 결론
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UCI(KEPA) : I410-ECN-0101-2016-550-002168861