Document: NUREG-0800
Document ID: 1e026b4f-5a81-43c8-9dd3-fef9bb4f9c3d
Document Type: srp
Title: INTERNALLY GENERATED MISSILES (INSIDE CONTAINMENT)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070372.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.1.2
CFR Part: 
CFR Title: 

Content:
design information on protection of structures and essential systems and componentsSSC important to safety from internally generated missiles, as presented in the 16 applicant's safety analysis report (SAR), is based on General Design Criterion 4. An additional basis for determining acceptability is the degree of similarity of the design to that of previously approved plants. The design of structures, systems, and componentsSSC is acceptable if the integrated design 17 affords missile protection in accordance with General Design Criterion 4, as it relates to structures housing essential systems and to the systemsSSC important to safety being capable 18 of withstanding the effects of internally generated missiles. A statement in the SAR that essential structures, systems, and componentsSSC important to safety will be afforded 19 3.5.1.2-3 DRAFT Rev. 3 - April 1996 protection by locating the systems or components in individual missile-proof structures, physically separating redundant systems or components of the system, or providing special localized protective shields or barriers, is an acceptable method for meeting this criterion at the construction permit stage for providing protection from internally generated missiles (inside containment). 20 Technical Rationale:21 The technical rationale for application of the above acceptance criterion to internally generated missiles (inside containment) is discussed in the following paragraph. GDC 4 establishes requirements regarding the ability of SSC important to safety to be protected from dynamic effects, including the effects of internally generated missiles. Equipment inside containment such as pressurized components, high-energy piping and rotating equipment all have a potential for generating credible missiles. The initiation of an internally generated missile is a dynamic effect and the impact of those missiles on SSC important to safety must be evaluated to ensure that the SSC important to safety are adequately