This paper presents a reliability-based low-cycle fatigue design approach for class 2 and 3 nuclear pipes. Initially, the methodology and background for the design of the pipes according to the ASME Boiler and Pressure Vessel (B&PV) Code is presented. Then a probabilistic design methodology based on the ASME B&PV Code and focused on straight pipes with butt-welds is presented. The method ensures an acceptable reliability level for piping by keeping the failure probability within some upper threshold and accounting for the uncertainties of the design variables. In opposition, the current design may result in diverse and often unknown probabilities of failure for piping. A computational example illustrates the developed method.
Issue Section:Design and Analysis
Keywords:boilers, butt welding, design, failure (mechanical), fatigue, pipes, pressure vessels, probability, reliability, fatigue, piping, probabilistic design, nuclear, reliability
Topics:Design, Pipes, Reliability, Stress, Failure, Fatigue, Cycles, Probability, Low cycle fatigue
Rules for Construction of Nuclear Facility Components. Boiler and Pressure Vessel Code,
A. R. C., and
K. Y., 1952, “
Fatigue Tests of Piping Components,”
E. C., 1983, “
Comparison of ASME Code Fatigue Evaluation Methods for Nuclear Class 1 Piping With Class 2 and 3 Piping,” Paper No. NUREG/CR-3243.
T. S., and
P. C., 1998, “
Fatigue of Butt-Welded Pipe,” WRC Bulletin 433, Report No. 1.
U.S. Department of Energy, 2005, “
Background of SIFs and Stress Indices for Moment Loading of Piping Components,” Technical Report No. 1012078.
B. M., and
R. H., 2003,
Probability, Statistics and Reliability for Engineers and Scientists,
Boca Raton, FL.
A., 1924, “
The Service Life of Ball Bearings,”
Z. Ver. Dtsch. Ing.0341-7255,
A. M., 1945, “
Cumulative Damage in Fatigue,”
ASME J. Appl. Mech.0021-8936,
K. J., and
K. P., 1977, “
Cumulative Damage Laws for Fatigue Crack Initiation and Stage I Propagation,”
J. Strain Anal.0022-4758,
A., 1971, “
Cumulative Fatigue Under Strain Controlled Conditions,”
Criteria of the ASME Boiler and Pressure Vessel Code for Design by Analysis in Sections III and VIII, Div. 2,
ASME United Engineering Center,
Criteria of the ASME Boiler and Pressure Vessel Code for Design by Analysis in Sections III,
D. P., and
M. S., 2002, “
Reliability-Based Design Guidelines for Fatigue of Ship Structures,”
Nav. Eng. J.0028-1425,
EuroCode 1. Basis of Design and Actions on Structures—Part I,” Paper No. ENV 1991-1:1994.
G. J., and
B. M., 1992, “
Probability-Based Ship Design: Implementation of Design Guidelines,” NTIS, Washington, DC, Report No. SSC 392.
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