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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.4
- 수록면
- 34 - 39 (6page)
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Nickel-based austenitic alloys such as Alloy 82 and 182 had been employed as the weld metals in nuclear power plants (NPPs) due to their high corrosion resistance as well as good mechanical properties. However, since the 2000s, the occurrence of primary water stress corrosion cracking has been reported in conjunction with these alloys in domestic and oversea NPPs. In the present work, we assumed an imaginary crack at the inner surface of a surge nozzle weld that had previously experienced the outside repair welding, and constructed its finite element model. Finite element analysis was performed with respect to the heat transfer, and then to the residual stress for obtaining the total applied stress distributions. These stress distributions were finally converted to the stress intensity factors for estimating crack growth rate. From the comparison of crack growth rate curves for the cases of no repair welding and outside repair welding, it was found that the outside repair welding did not exhibit negative effect on the crack growth for the surge nozzle under consideration in this work; in both cases, the cracks stopped growing before they became the through-wall cracks.
목차
Abstract
1. 서론
2. 평가 방법
3. 평가 결과
4. 결론
참고문헌
참고문헌 (17)
참고문헌 신청
1. [기타자료] - Materials Reliability Program / 2004 / Alloy 82/182 Pipe Butt Weld Safety Assessment for U.S. PWR Plant Designs(MRP-113) / EPRI, Palo Alto, CA : 1009804 ~
2. [기타자료] - / 2004 / Materials Reliability Program : Evaluation of the Effect of Weld Repairs on Dissimilar Metal Butt Welds(MRP-114) / EPRI, Palo Alto, CA : 1009559 ~
3. [기타자료] - USNRC / 2008 / Regulatory Approach for PWSCC of Dissimilar Metal Welds in Pressurized Water Reactor Primary Coolant System Piping / Regulatory Issue Summary 2008-25
4. [학술지(정기간행물)] - S.C. Kim / 1987 / The Application of Forman Equation for Fatigue Crack Propagation in Welding Residual Stress Region / Journal of the KWS 5 (1) : 42 ~ 48
5. [학술지(정기간행물)] - Y. B. Lee / 1995 / Redistribution of Welding Stress and Its Effects on Fatigue Crack Propagation / Journal of the KWS 13 (4) : 155 ~ 162
2. [기타자료] - / 2004 / Materials Reliability Program : Evaluation of the Effect of Weld Repairs on Dissimilar Metal Butt Welds(MRP-114) / EPRI, Palo Alto, CA : 1009559 ~
3. [기타자료] - USNRC / 2008 / Regulatory Approach for PWSCC of Dissimilar Metal Welds in Pressurized Water Reactor Primary Coolant System Piping / Regulatory Issue Summary 2008-25
4. [학술지(정기간행물)] - S.C. Kim / 1987 / The Application of Forman Equation for Fatigue Crack Propagation in Welding Residual Stress Region / Journal of the KWS 5 (1) : 42 ~ 48
5. [학술지(정기간행물)] - Y. B. Lee / 1995 / Redistribution of Welding Stress and Its Effects on Fatigue Crack Propagation / Journal of the KWS 13 (4) : 155 ~ 162
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UCI(KEPA) : I410-ECN-0101-2012-581-004485797