The ASME Boiler and Pressure Vessel Code provides rules for the construction of nuclear power plant components. This Code specifies fatigue design curves for structural materials. However, the effects of light water reactor (LWR) coolant environments are not explicitly addressed by the Code design curves. Existing fatigue strain-vs.-life (ε-N) data illustrate potentially significant effects of LWR coolant environments on the fatigue resistance of pressure vessel and piping steels. This report provides an overview of the existing fatigue ε-N data for carbon and low-alloy steels and wrought and cast austenitic SSs to define the effects of key material, loading, and environmental parameters on the fatigue lives of the steels. Experimental data are presented on the effects of surface roughness on the fatigue life of these steels in air and LWR environments. Statistical models are presented for estimating the fatigue ε-N curves as a function of the material, loading, and environmental parameters. Two methods for incorporating environmental effects into the ASME Code fatigue evaluations are discussed. Data available in the literature have been reviewed to evaluate the conservatism in the existing ASME Code fatigue evaluations. A critical review of the margins for the ASME Code fatigue design curve is presented.
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ASME 2003 Pressure Vessels and Piping Conference
July 20–24, 2003
Cleveland, Ohio, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
0-7918-1694-X
PROCEEDINGS PAPER
Margins for ASME Code Fatigue Design Curve: Effects of Surface Finish and Material Variability
O. K. Chopra,
O. K. Chopra
Argonne National Laboratory, Argonne, IL
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W. J. Shack
W. J. Shack
Argonne National Laboratory, Argonne, IL
Search for other works by this author on:
O. K. Chopra
Argonne National Laboratory, Argonne, IL
W. J. Shack
Argonne National Laboratory, Argonne, IL
Paper No:
PVP2003-1772, pp. 71-85; 15 pages
Published Online:
August 13, 2008
Citation
Chopra, OK, & Shack, WJ. "Margins for ASME Code Fatigue Design Curve: Effects of Surface Finish and Material Variability." Proceedings of the ASME 2003 Pressure Vessels and Piping Conference. Pressure Vessel and Piping Codes and Standards. Cleveland, Ohio, USA. July 20–24, 2003. pp. 71-85. ASME. https://doi.org/10.1115/PVP2003-1772
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