Document: NUREG-0800
Document ID: 73bfb001-838f-4b48-a387-d3ef2ee987b5
Document Type: srp
Title: SEISMIC CLASSIFICATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340616.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.2.1
CFR Part: 
CFR Title: 

Content:
ing and instrumentation diagrams in the SAR. Other structures, systems and components that may be required for operation of the facility (excluding electrical features) need not be designed to seismic Category I requirements. The structures, systems and components not required to be designed to seismic Category I include those portions of Category I systems such as vent lines, drain lines, fill lines and test lines on the downstream side of isolation valves and those portions of the systems which are not required to perform a safety function. The staff concludes that the structures, systems and components important to safety that are within the scope of the Mechanical Engineering Branch have been properly classified as seismic Category I items and meet the requirements of General Design Criteria 2, "Design Bases for Protection Against Natural Phenomena" and 10 CFR Part 100, Appendix A, "Seismic and Geologic Siting Criteria for Nuclear Power Plants." This conclusion is based on the applicant having met the requirements of General Design Criterion 2, and 10 CFR Part 100, Appendix A, by having properly classified their structures, systems and components (SSC) important to safety as seismic Category I items in accordance with the positions of Regulatory Guide 1.29, "Seismic Design Classification" and by our conclusion that the identified SSC are the plant features necessary to assure (1) the integrity of the reactor coolant pressure boundary, (2) the capability to shutdown the reactor and maintain it in a safe shutdown condition, and (3) the capability to prevent and mitigate the consequences of accidents which could result in potential offsite exposures comparable to the guideline exposures of 10 CFR Part 100. V. IMPLEMENTATION The following is intended to provide guidance to applicants and licensees regarding the NRC staff's plan for using this SRP Section. 3.2.1-4 Rev. 1 - July 1981 Except in those cases in which the applicant proposes an acceptable alternative