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:
oundations and supports, are designated as seismic Category I and should be designed to withstand the effects of the SSE and remain functional. In addition, RG 1.29 recommends that systems, other than radioactive waste management systems, that contain, or may contain, radioactive material and whose postulated failure would result in potential offsite whole body (or equivalent) doses that are more than 0.005 Sv (0.5 rem), should also be classified as seismic Category I. Conformance with RG 1.29 assures that, by designing the SSCs identified in the guide to withstand the effects of an SSE, a designed-in safety margin is provided for bringing the reactor to a safe, shutdown condition, while also reducing potential offsite doses from seismic events. b. In addition, certain system-specific regulatory guides provide information on seismic classification of portions of those systems at a more precise level of detail than is provided in the general statements in RG 1.29. RG 1.151 provides guidance for the proper seismic classification of safety-related instrumentation sensing lines used to actuate or monitor safety-related systems. c. Compliance with the above requirements and guidance assures that the SSCs important to safety are properly classified as seismic Category I and will function during an SSE enabling accomplishment of the safety functions described above. 3. Compliance with GDC 60 requires, in part, that the nuclear power unit design include means to control suitably the release of radioactive materials in gaseous and liquid effluents. RG 1.143 provides acceptable methods and guidance relative to seismic design and classification for radioactive waste management SSCs. RG 1.143 also provides classification information and design criteria to assure that components and structures used in radioactive waste management systems are designed, constructed, installed and tested in a manner that protects the health and safety of the public and the plant operating