Document: NUREG-0800
Document ID: 1c54f5f9-dd57-4543-a00d-1597061af2e0
Document Type: srp
Title: SEISMIC CLASSIFICATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1608/ML16084A812.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.2.1
CFR Part: 
CFR Title: 

Content:
ompleteness 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 as seismic Category I, the boundary limits of that portion of the system designed to seismic Category I provisions are reviewed on the piping and instrumentation diagrams. For fluid systems that are partially seismic Category I, the seismic 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 Category I portion of the system. At the physical 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 nonseismic system or to a sufficient distance in the nonseismic 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 seismic Category I provisions are identified on the plant arrangement drawings. The interfaces between components and associated support structures designed to seismic Category I provisions are then checked to assure compatibility. a. The reviewer verifies that the seismic classification of safety-related instrumentation sensing lines is in accordance with the guidance in RG 1.151. 3. SSCs that are classified as seismic Category I and other SSCs with specific seismic design requirements are also reviewed to determine appropriate inclusion of plant features that 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 accordance with RG 1.29, the pertinent