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ANS 58.9

81st Edition, January 1, 2002

Complete Document

Single failure criteria for light water reactor safety-related fluid systems

Includes all amendments and changes through Reaffirmation Notice , February 12, 2015


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Product Details:

  • Revision: 81st Edition, January 1, 2002
  • Published Date: February 12, 2015
  • Status: Active, Most Current
  • Document Language: English
  • Published By: American Nuclear Society (ANS)
  • Page Count: 16
  • ANSI Approved: Yes
  • DoD Adopted: No

Description / Abstract:

This standard provides criteria for the designer which interpret the requirements of Title 10, Code of Federal regulations, part 50 "Licening of Production and Utilization Facilies," Appendix A, "General Design Criteria for Nuclear Power Plants," with respect to design against single failures in safety-related Light Water reactor (LWR) fluid systems [1]2. Means of treating both active and passive failures are addressed for safety-related fluid systems following various intiating events. Current acceptable practics is used as a basis for these criteria.

Failure criteria for the electric power systems and the protection systems are provided in ieee std 308-1980 "IEEE Standard Criteria for Class 1E Power Systems for Nuclear Power Generating Stations", IEEE Std 279-1971 "IEEE Standard Criteria for Protection Systems for Nuclear Power Generating Stations" (N42.7-1972), IEEEE std 379-1977 "IEEE Standard for Application of the Single-Failure Criterion to Nuclear power Generating Station Class IE Systems", and IEEE Std 603-1980 "Standard Criteria for Safety Systems for Nuclear Power Generating Stations."[2,3,4,5] Failures of structural components, such as braces, supports, or restrains, as well as occurrences involving common mode failures, are excluded.