Document: NUREG-0800
Document ID: 7d53889c-d236-4e84-9579-a2beb4716167
Document Type: srp
Title: SEISMIC CLASSIFICATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070296.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.2.1
CFR Part: 
CFR Title: 

Content:
and the guidance on seismic design and classification contained in Regulatory Guide 1.143 provides assurance that SSCs containing radioactivity will be properly classified and radiation exposures as a result of seismic events will be as low as reasonably achievable. III. REVIEW PROCEDURES Selection and emphasis of various aspects of the areas covered by this SRP section will be made by the reviewer on each case. The judgment on the areas to be given attention during the review is to be based on an inspection of the material presented, the similarity of the material to that recently reviewed on other plants, and whether items of special safety significance are involved. Regulatory Guide 1.29, which identifies structures, systems, and componentsSSCs of 37 light-water-cooled reactors on a functional basis, is the principal document used for identifying those plant features important to safety which, as a minimum, should be designed to seismic Category I requirements. Regulatory Guide 1.151 provides guidance for the seismic classification of safety-related instrument sensing lines. Regulatory Guide 1.29 also 38 recommends that systems, other than radioactive waste management systems, that contain, or may contain, radioactive material and whose postulated failure would result in conservatively calculated potential offsite whole body (or equivalent to any part of the body) doses that are DRAFT Rev. 2 - April 1996 3.2.1-6 more than 0.005 Sv (0.5 rem) , should also be classified as seismic Category I. Regulatory 39 Guide 1.143 provides seismic design requirements for radioactive waste management system SSCs. Those radioactive waste management systems requiring seismic design considerations should be clearly identified. 40 The staff review should establish whether the applicant has indicated compliance with Regulatory Guides 1.29, 1.143 and 1.151 in the SAR. Where there are differences with respect 41 to the Guides, these differences should be identified. For General