Document: NUREG-0800
Document ID: 49dad160-99d7-4356-a70a-18bb6f08d141
Document Type: srp
Title: SEISMIC CLASSIFICATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1422/ML14227A643.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.2.1
CFR Part: 
CFR Title: 

Content:
ng 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 QA requirements of 10 CFR Part 50, Appendix B should be applied to all activities affecting the safety functions of seismic Category I SSCs. The seismic classification review of SSCs important to safety and the review verifying that these plant features are constructed in accordance with a 10 CFR Part 50, Appendix B, QA Program is normally performed concurrently with the quality group classification review of SRP Section 3.2.2. 3.2.1-9 Draft Revision 3 – August 2015 a. Other SSCs that may be necessary for operation of the facility (excluding electrical features) need not be designed to seismic Category I provisions. Those SSCs of lower safety significance such that they need not be designed to seismic Category I provisions include those portions of seismic Category I systems such as vent lines, drain lines, fill lines and