Class 2 and 3 nuclear piping is designed according to the allowable stress design (ASD) method used in the ASME Boiler and Pressure Vessel (B&PV) code, Sec. III, Division 1, NC and ND-3600 according to which safety factors applied to the strength of steel (resistance) provide acceptable safety margins for the piping design. This paper describes the development of design equations according to the load and resistance factor design (LRFD) method for loads that cause primary stress such as sustained weight, internal pressure, and earthquake for different levels of piping operation. The LRFD method differs from the ASD since multiple factors, applied separately to each load and the strength of steel, provide safety margins that correspond to a known and acceptable probability of failure for the piping. Load combinations are provided, statistical properties for the variables under consideration are presented and the partial safety factors are moreover illustrated for different values of the target reliability index.
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e-mail: clioavr@yahoo.com
e-mail: ba@umd.edu
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April 2010
Research Papers
Load and Resistance Factor Design (LRFD) of Nuclear Straight Pipes for Loads That Cause Primary Stress
Kleio Avrithi,
Kleio Avrithi
Department of Civil and Environmental Engineering,
e-mail: clioavr@yahoo.com
University of Maryland
, College Park, MD 20742
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Bilal M. Ayyub, PE
Bilal M. Ayyub, PE
Professor and Director
Department of Civil and Environmental Engineering, Center of Technology and Systems Management,
e-mail: ba@umd.edu
University of Maryland
, College Park, MD 20742
Search for other works by this author on:
Kleio Avrithi
Department of Civil and Environmental Engineering,
University of Maryland
, College Park, MD 20742e-mail: clioavr@yahoo.com
Bilal M. Ayyub, PE
Professor and Director
Department of Civil and Environmental Engineering, Center of Technology and Systems Management,
University of Maryland
, College Park, MD 20742e-mail: ba@umd.edu
J. Pressure Vessel Technol. Apr 2010, 132(2): 021101 (14 pages)
Published Online: March 31, 2010
Article history
Received:
November 15, 2009
Revised:
December 28, 2009
Online:
March 31, 2010
Published:
March 31, 2010
Citation
Avrithi, K., and Ayyub, B. M. (March 31, 2010). "Load and Resistance Factor Design (LRFD) of Nuclear Straight Pipes for Loads That Cause Primary Stress." ASME. J. Pressure Vessel Technol. April 2010; 132(2): 021101. https://doi.org/10.1115/1.4000976
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