Document: NUREG-0800
Document ID: 92d817ac-3ce3-4cf7-8d1a-627e8242fbf2
Document Type: srp
Title: PLANT DESIGN FOR PROTECTION AGAINST POSTULATED PIPING FAILURES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070312.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.6.1
CFR Part: 
CFR Title: 

Content:
and associated supports which determine the resulting loadings as a result of a postulated pipe break, including: (a) The locations and number of design basis breaks on which the dynamic analyses are based. (b) The postulated rupture orientation, such as a circumferential and/or longitudinal break(s), for each postulated design basis break location. (c) A description of the forcing functions used for the pipe whip dynamic analyses, including the direction, rise time, magnitude, duration, and initial conditions that adequately represent the jet stream dynamics and the system pressure difference. (d) Diagrams of mathematical models used for the dynamic analysis. (e) A summary of the analyses which demonstrates that unrestrained motion of ruptured lines will not damage to an unacceptable degree, structures, systems, or components important to safety, such as the control room. 5. A description should be provided of the measures, as applicable, to protect against pipe whip, blowdown jet and reactive forces, including: (a) Pipe restraint design to prevent whip impact; (b) Protective provisions for structures, systems, and components required for safety against pipe whip and blowdown jet and reactive forces; (c) Separation of redundant features; (d) Provisions to separate physically piping and other components of redundant features; and (e) A description of the typical pipe whip restraints and a summary of number and location of all restraints in each system. 6. The procedures that will be used to evaluate the structural adequacy of Category I structures and to design new seismic Category I structures should be provided, including: (a) The method of evaluating stresses, e.g., the working stress method and/or the ultimate strength method that will be used; (b) The allowable design stresses and/or strains; and (c) The load factors and the load combinations. DRAFT Rev. 3 - April 1996 3.6.1-22 7. The structural design loads, including the pressure and temperature transients,