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:
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 functions. The reviewer may use failure mode and effect analyses and the results of reviews by other branches in evaluating specific SSC and the origin of possible missiles, in identifying the SSC that require protection from internally generated missiles and the adequacy of the protection provided. Components within one train of a system containing redundant trains need not be protected from missiles originating from the same train. The reviewer determines that nonsafety-related SSC are protected from internally generated missiles if their failure by a missile impact could prevent a required safety function of the SSC. IV. EVALUATION FINDINGS The reviewer verifies that sufficient information has been provided to satisfy the requirements of this SRP section and that his evaluation is complete and adequate to support conclusions of the following type, to be included in the staff's safety evaluation report: The review of possible effects of internally generated missiles (outside containment) included structures, systems, and components whose failure could prevent safe shutdown of the plant or result in significant uncontrolled release of radioactivity. Based on the review of the applicant's design bases and criteria for essential structures, systems, and components necessary to maintain a safe plant shutdown, the staff concludes that the structures, systems, and components to be protected from internally generated missiles (outside containment) meet the requirements of General Design Criterion 4. This conclusion is based on our determination that the applicant has met the requirement of GDC 4 with respect to protection of safety-related SSC from internal missiles outside containment as the applicant: 1. Has met regulatory positions C.1 and C.3 of Regulatory Guide 1.115