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:
provides seismic design provisions for radioactive waste management system SSCs. Those radioactive waste management systems needing seismic design considerations should be clearly identified. RG 1.189 provides guidance for seismic classification and analysis of fire protection systems SSCs. Those portions of fire protection systems needing seismic design considerations should be clearly identified. a. The staff review should determine whether the applicant has indicated conformance with RGs 1.29, 1.143, 1.151, and 1.189 in the SAR. Where there are differences with respect to the Guides, these differences should be identified and the staff’s evaluation of whether they are acceptable (after requesting additional information from the applicant, if necessary) should be documented in the safety evaluation report. 2. The information in the SAR identifying seismic Category I SSCs and other SSCs with specific seismic design requirements 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 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