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Summary and Comparision of Significant Historical Changes in the Design Requirements for Safety Class 2 and 3 Piping Systems in the ASME Boiler and Pressure Vessel Code, Section III, Division 1

[+] Author Affiliations
Timothy M. Adams, Charles A. Papadelis

Stevenson and Associates, Independence, OH

Paper No. ICONE20-POWER2012-54243, pp. 63-76; 14 pages
doi:10.1115/ICONE20-POWER2012-54243
From:
  • 2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference
  • Volume 4: Codes, Standards, Licensing, and Regulatory Issues; Fuel Cycle, Radioactive Waste Management and Decommissioning; Computational Fluid Dynamics (CFD) and Coupled Codes; Instrumentation and Controls; Fuels and Combustion, Materials Handling, Emissions; Advanced Energy Systems and Renewables (Wind, Solar, Geothermal); Performance Testing and Performance Test Codes
  • Anaheim, California, USA, July 30–August 3, 2012
  • Conference Sponsors: Nuclear Engineering Division, Power Division
  • ISBN: 978-0-7918-4498-4
  • Copyright © 2012 by ASME

abstract

Design rules for Safety Related Class 2 and 3 piping systems were first incorporated in the ASME Boiler and Pressure Vessel Code, Section III, Division 1 in the 1971 Edition. Since that time, the rules have evolved. The most significant changes were (a) implementation of the use of B’s stress indices for primary stresses, (b) reduction in the factor of safety for base pressure design from 4 to 3.5, and (c) implementation of new criteria for reversing dynamic loads. Each of these changes is discussed and the sequential and cumulative effect of changes on design margin is presented. In addition, the general history of the evolution of Class 2/3 designs in Section III of the ASME Boiler and Pressure Vessel Code is provided.

Copyright © 2012 by ASME

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