Document: NUREG-0800
Document ID: 1dabf375-d973-4499-a224-cf6b3b2a0de9
Document Type: srp
Title: INTERNALLY GENERATED MISSILES (OUTSIDE CONTAINMENT)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0703/ML070370569.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.1.1
CFR Part: 
CFR Title: 

Content:
Components within one train of a system with redundant trains need not be protected from missiles originating from the same train. Technical Rationale The technical rationale for application of these acceptance criteria to the areas of review addressed by this SRP section is discussed in the following paragraphs: 1. 10 CFR 50, Appendix A, GDC 4 establishes requirements for the protection of SSCs important to safety from dynamic effects, including those of internally-generated missiles. The failure of such internal facility equipment as pressurized components, high-energy piping, and rotating equipment outside the containment may generate missiles. An internally-generated missile is a dynamic effect of such failures and its impact on SSCs important to safety must be evaluated. RG 1.115 describes methods acceptable to the staff for protection of SSCs important to safety from the effects of missiles resulting from turbine failure. Cumulative failure data for conventional plants indicate that the protection of SSCs important to safety from the effects of missiles is an appropriate safety consideration. Protecting SSCs important to safety from the effects of internally-generated missiles ensures the integrity of the reactor coolant pressure boundary, the capability to shut down and maintain the reactor in a shutdown condition, and the capability to prevent significant uncontrolled release of radioactivity. 3.5.1.1-5 Revision 3 - March 2007 III. REVIEW PROCEDURES The reviewer will select material from the procedures described below, as may be appropriate for a particular case. These review procedures are based on the identified SRP acceptance criteria. For deviations from these acceptance criteria, the staff should review the applicant’s evaluation of how the proposed alternatives provide an acceptable method of complying with the relevant NRC requirements identified in Subsection II. 1. Review of the effects of internally-generated missiles on structures is a primary