Document: NUREG-0800
Document ID: 7d53889c-d236-4e84-9579-a2beb4716167
Document Type: srp
Title: SEISMIC CLASSIFICATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070296.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.2.1
CFR Part: 
CFR Title: 

Content:
are 60 important to safety and that are required to withstand the effects of a safe shutdown earthquake and remain functional have been classified as seismic Category I items and have been identified in an acceptable manner in Tables 3.X.X and 3.X.X, and on system piping and instrumentation diagrams in the SAR. Other structures, systems and componentsSSCs that may be required for operation of the facility (excluding electrical 61 features) need not be designed tonot identified as seismic Category I requirements, but whose failure could reduce the functioning of any seismic Category I feature to an unacceptable safety level or injure control room personnel, are identified for analysis to assure the SSE will not cause such failures. The structures, systems and components not required to be designed to seismic Category I include those portions of Category I systems such as vent lines, drain lines, fill lines and test lines on the downstream side of isolation valves and those portions of the systems which are not required to perform a safety function.62 The staff concludes that the structures, systems and componentsSSCs important to 63 safety that are within the scope of the Mechanical Engineering Branchthis review have been properly classified, are within the scope of the applicant's Quality Assurance Program, as seismic Category I items and thus meet the relevant requirements of General Design Criteria 1, 2, "Design Bases for Protection Against Natural Phenomena" and 61, 10 CFR Part 50, Appendix B, and 10 CFR Part 100, Appendix A, "Seismic and Geologic Siting Criteria for Nuclear Power Plants."64 This conclusion is based on: 1. The applicant having met the requirements of General Design Criterion 1 by providing a commitment in the SAR that seismic Category I SSCs will be designed, constructed and operated under a Quality Assurance Program, in compliance with the requirements of 10 CFR Part 50, Appendix B.65 2. The applicant having met the requirements of General