Document: NUREG-0800
Document ID: 2ff4b7bf-0033-46ea-abe0-313b6bff2ac6
Document Type: srp
Title: SEISMIC CLASSIFICATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0631/ML063190002.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.2.1
CFR Part: 
CFR Title: 

Content:
espect to the Guides, these differences should be identified. 2. The information in the SAR identifying Seismic Category I SSCs is reviewed for completeness and to assure there is sufficient detail to permit identification of specific items. This may include a review of the SAR text, tables, plot plans, general arrangement drawings, structural drawings, and piping and instrumentation diagrams, as appropriate. Where portions of a system are classified Seismic Category I, the boundary limits of that portion of the system designed to Category I requirements are reviewed on the piping and instrumentation diagrams. For fluid systems that are partially Seismic Category I, the Category I portion of the system should extend to the first seismic restraint beyond the isolation valves that isolate the part that is Seismic Category I from the non-seismic portion of the system. At the interface between Seismic and non-Seismic Category I piping systems, the Seismic Category I dynamic analysis will be extended to either the first anchor point in the non-seismic system or to a sufficient distance in the non-seismic system so as not to degrade the validity of the Seismic Category I analysis. In addition, where portions of a structure are classified Seismic Category I, those portions of the building foundations and supports designed to Category I requirements are identified on the plant arrangement drawings. The interfaces between components and associated support structures designed to Seismic Category I requirements are then checked to assure compatibility. The reviewer verifies that the seismic classification of safety-related instrumentation sensing lines is in accordance with the guidance in RG 1.151 positions C.2 and C.3. 3. SSCs that are classified Seismic Category I are also reviewed to assure that these plant features are within the scope of an applicant's QA Program. This QA Program should be in compliance with the pertinent QA requirements of 10 CFR Part 50, Appendix B. In