Document: NUREG-0800
Document ID: 92f9abb2-62e6-4930-b080-2b4641f466c2
Document Type: srp
Title: INTERNALLY GENERATED MISSILES (OUTSIDE CONTAINMENT)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340643.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.1.1
CFR Part: 
CFR Title: 

Content:
set forth in the final safety analysis report. The reviewer selects and emphasizes areas within the scope of this SRP section as may be appropriate in a particular case. The reviews of the effects of internally generated missiles on structures are performed by SEB as part of its primary responsibility for SRP Section 3.5.3. The objective in the review of the reactor facility, structures, systems and components, with regard to protection requirements for internally generated missiles, is to identify the SSC that are needed to perform a safety function. Some structures and systems are designed as safety-related in their entirety, others have portions that are safety-related, and others are classified as not needed for safety. In order to determine their safety category, the ASB evaluates 3.5.1.1-2 Rev. 2 - July 1981 the SSC with regard to their function in achieving and maintaining a safe reactor shutdown condition or in preventing accidents or mitigating the con- sequences of such accidents. The single failure criterion is used in the analysis. The safety functions to be performed by the SSC in the various plant designs are essentially the same. However, the location and arrangement of the SSC and the methods used vary from plant to plant depending upon the indi- vidual design. The review identifies variations in plant designs that must be evaluated on an individual case basis. SSC that perform a safety function, or which by virtue of their failure could have an adverse effect on a safety function, should be protected from the effects of internally generated missiles. The information provided in the SAR pertaining to SSC design bases and criteria, system descriptions and safety evaluations, piping and instrumentation diagrams, station layout drawings, and system and component characteristic and classifica- tion tables are reviewed to identify potential sources of missiles and to deter- mine the SSC that require protection in order to maintain their safety-related