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:
e with, environmental conditions associated with normal operations, maintenance, testing, and postulated accidents, including loss-of-coolant accidents. These structures, systems, and components shall be appropriately protected against dynamic effects (including those of missiles, pipe whipping, and discharge fluids) that may result from equipment failures and from events outside the nuclear power unit. However, dynamic effects associated with postulated pipe ruptures in nuclear power units may be excluded from the design basis when analyses reviewed and approved by the Commission demonstrate that the probability of fluid system piping rupture is extremely low under conditions consistent with the design basis for piping. GDC 4 applies to this SRP section because the reviewer verifies that a suitable and controlled operating environment will be provided for structures, systems, and components during normal operations, during anticipated operational occurrences, and during and after postulated accidents, including loss-of-coolant accidents. In the case of SRP Section 3.6.1, these requirements are imposed to ensure (a) that piping failures in fluid systems outside the containment will not cause the loss of needed function in safety-related systems and (b) that the plant could be safely shut down in the event of such a failure. Meeting the requirements of GDC 4 provides assurance that structures, systems, and components will not fail to operate as designed, thereby providing protection against loss of core cooling and loss of containment integrity.15 3.6.1-5 DRAFT Rev. 3 - April 1996 III. REVIEW PROCEDURES All the systems of concern in this section have been reviewed under other SRP sections with respect to design functions for normal operation and for the prevention or mitigation of accidents. The review under this SRP section does not deal with individual system design requirements necessary to assureensure that each system performs as intended, but rather considers