Browse > Article
http://dx.doi.org/10.20466/KPVP.2016.12.1.030

Investigation on the Studies for Welding Residual Stresses in Nuclear Components  

Kim, Jong Sung (세종대학교 원자력공학과)
Publication Information
Transactions of the Korean Society of Pressure Vessels and Piping / v.12, no.1, 2016 , pp. 30-40 More about this Journal
Abstract
The paper investigates the previous studies about welding residual stresses in nuclear components. First, various residual stress measurement methods are reviewed in applicability. Second a finite element welding residual stress analysis technique, which was developed from the viewpoint of FFS (Fitness-For-Service) assessment, is explained. Third, characteristics of the welding residual stresses on J-groove welds and butt welds were presented via investigating the previous studies. Last, engineering formulae for residual stresses in the FFS assessment codes such as R6 and API 579/ASME FFS-1 Code is summarized.
Keywords
Nuclear Components; Welding Residual Stresses; Primary Water Stress Corrosion Cracking; Finite Element Analysis; Residual Stress Measurement; Stress Intensity Factor;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
연도 인용수 순위
1 USNRC, 2008, Davis-Besse Reactor Pressure Vessel Head Penetration: Overview, Lessons Learned, and NRC Actions Based on Lessons Learned, NUREG/BR-0353, Rev.1.
2 USNRC, 2005, U.S. Plant Experience with Alloy 600 Cracking and Boric Acid Corrosion of Light-Water Reactor Pressure Vessel Materials, NUREG-1823.
3 http://www.nrc.gov/reactors/operating/ops-experience/pressure-boundary-integrity/weld-issues/
4 KHNP, 2009, Structural Integrity Report for Dissimilar Metal Welds on SG Drain Nozzle of Y#4.
5 KHNP, 2011, Structural Integrity Report for Dissimilar Metal Welds on RPV Upper Head Vent Nozzle of Y#4.
6 Gubeljak, Nenad, et al., 2005, "Effect of residual stresses on the fatigue crack propagation in welded joints," J. of ASTM International, Vol. 2, No. 3.
7 Kim, J.S., Jin, T.E., Dong, P., Prager, M., 2003, "Development of residual stress analysis procedure for fitness-for-service assessment of welded structure," Trans. of KSME A, Vol. 27, No. 5, pp. 713-723.   DOI
8 Dong, P. and Hong, J.K., Recommendations for Determining Residual Stresses in Fitness-For-Service Assessment, WRC Bulletin 476, 2002.
9 Koppenhoefer, K.C. and Gordan, R., 2000, "IIW X-XV RSDP residual stress round-robin results-pahse 1," Presentation at IIW 2000 Annual Assembly, Florence, Italy, IIW-X- XV- RSDP-50-2000.
10 EPRI, TR-1009403, Material Reliability Program: Reactor Vessel Head Nozzle and Weld Safety Assessment for Westinghouse and Combustion Engineering Plants, (MRP-104), 2004.
11 EPRI, TR-103696, PWSCC of Alloy 600 Materials in PWR Primary System Penetrations, 1994.
12 Westinghouse, WCAP-16024-P, Structural Integrity Evaluation of Reactor Vessel Upper Head Penetrations to Support Continued Operation: K-1 Nuclear Power Station, 2003.
13 Kim, Jong Sung and Seo, Joong Hyun, 2012, "A study on welding residual stress analysis of a small bore nozzle with dissimilar metal welds," Int. J. of Pressure Vessels and Piping, Vol. 90-91, pp. 69-75.   DOI
14 Kim, Jong-Sung, et al., 2015, "Investigation of the effects of geometric variables on the residual stresses and PWSCC growth in the RPV BMI penetration Nozzles," J. of Mechanical Science and Technology, Vol. 29, No. 3, pp. 1049-1064.   DOI
15 Kang, Sung-Sik, et al., 2014, "The experience and analysis of vent pipe PWSCC (primary water stress corrosion cracking) in PWR vessel head penetration," Nuclear Engineering and Design, Vol. 269, pp. 291-298.   DOI
16 KHNP, Guideline for Finite Element Welding Residual Stress Analysis of Dissimilar Weld in Nuclear Power Plants, 2012.
17 Bae, H.Y., Oh, C.Y., Kim, Y.J., Kim, K.H., Chae, S.W., Kim, J.H., 2013, "Sensitivity analysis of nozzle geometry variables for estimating residual stress in RPV CRDM penetration nozzle", Tans. of KSME A, Vol. 37, No. 3, pp. 387-395.   DOI
18 EPRI, TR-1009378, Material Reliability Program: Welding Residual and Operating Stresses in PWR Alloy 182 Butt Welds, (MRP-106), 2004.
19 EPRI, NP-4690-SR, Evaluation of Flaws in Austenitic Steel Piping, 1986.
20 EPRI, TR-1015400, Material Reliability Program: Advanced FEA Evaluation of Growth of Postulated Cir- cumferential PWSCC Flaws in Pressurizer Nozzle Dissimilar Metal Welds, (MRP-215), Rev.1, 2007.
21 EPRI, TR-1021014, Material Reliability Program: Technical Basis for Preemptive Weld Overlays for Alloy 82/182 Butt Welds in Pressurized Water Reactors (PWRs), (MRP-169), Rev.1-A, 2010.
22 UNRC, NUREG/CR-6837, The Battelle Integrity of Nuclear Piping (BINP), 2005.
23 $EMC^2$, Implication of Wolf Creek Indications - Final Report, 2007.
24 PVRC JIP Phase II, Prediction of Residual Stresses Effects of Welding, PWHT, Local PWHT, and Alternative Stress Improvement Techniques, 2007.
25 Kim, T.J., Jeong, W.H., Huh, N.S., 2015, "Stress distributions at the dissimilar metal weld of safety injection nozzles according to safe-end length and SMW thickness", Trans. of KSME A, Vol. 39, No. 10, pp. 979-984.   DOI
26 Lee, W.S., Huh, N.S., Kim, J.S., Lee, J.H., 2013, "Stress distribution in the dissimilar metal butt weld of nuclear reactor piping due to the simulation technique for the repair welding", Trans of KSME A, Vol. 37, No. 5, pp. 649-655.   DOI
27 Kim, J.S., Kim, J.H., Bae, H.Y., Oh, C.Y., Kim, Y.J., Lee, K.S., Song, T.K., 2012, "Welding residual stress distributions for dissimilar metal nozzle butt welds in pressurized water reactors", Trans. of KSME A, Vol. 36, No. 2, pp. 137-148.   DOI
28 EU, SINTAP: Structural Integrity Assessment Procedures for European Industry, 1998.
29 British Energy, R6: Assessment of the Integrity of Structures Containing Defects, Rev.4, 2001.
30 API and ASME, API 579/ASME FFS-1: Recommended Practice for Fitness for Service, 2008.
31 ASTM, E837-08e2, Standard Test Method for Determining Residual Stresses by the Hole-Drilling Strain-Gage Method.
32 ASTM, E2860-12, Standard Test Method for Residual Stress Measurement by X-Ray Diffraction for Bearing Steels.
33 Withers, P.J. and Bhadeshia, H.K.D.H, 2001, "Overview residual stress part 1 - measurement techniques," Material Science and Technology, Vol. 17, pp. 355-365.   DOI
34 http://www.veqter.co.uk/residual-stress-measurement
35 EPRI, PWSCC of Alloy 600 Materials in PWR Primary System Penetrations, EPRI TR-103696, 1994.
36 The Open Univeristy, 2011, Application of the Contour Method to Validate Residual Stress Predictions, Open Research Online.
37 Ueda, Y. and Yuan, M.G., 1992, "The characteristics of the source of welding residual stress (inherent strain) and its application to measurement and prediction," in Mechanical Effects of Welding, Springer, pp.105-121.
38 EPRI, TR-103696, PWSCC of Alloy 600 Materials in PWR Primary System Penetrations, 1994.