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:
REVIEW RESPONSIBILITIES Primary - Organization responsible for the review plant design for protection of structures, systems, and components from internal and external hazards Secondary - None I. AREAS OF REVIEW All structures, systems, and components (SSCs) ( outside containment) are to be protected from internally-generated missiles to ensure compliance with 10 CFR 50, Appendix A, General Design Criterion (GDC) 4 requirements. The review includes internally-generated missiles from component overspeed failures, missiles that could originate from high-energy fluid systems failures, and missiles caused by or as a consequence of gravitational effects. The review includes functional operations and performance requirements for all SSCs outside containment, identification of SSCs necessary for the safe shutdown of the reactor facility and the failure of SSCs that could cause a significant release of radioactivity. The review also includes adequacy of methods of protection from internally-generated missiles for all SSCs necessary to perform functions required to attain and maintain a safe shutdown or to mitigate the consequences of an accident. The specific areas of review are as follows: 3.5.1.1-2 Revision 3 - March 2007 1. Protection from internally-generated missiles (outside containment) including identification of structures, systems or portions of systems, components and the methods of protection provided. Determination of the potential of pressurized components and systems for generating missiles such as valve bonnets and hardware-retaining bolts, relief valve parts, turbine blades, and instrument wells. Determination of the potential of high-speed rotating machinery for generating missiles from component overspeed or such failures as the pump itself (from seizure), pump or component parts, and rotating segments (e.g., impellers and fan blades). 2. Internal missile effects on nonsafety-related SSCs in areas with safety-related SSCs if the failure of the