A.This standard provides:(i)criteria and guidelines for selecting an SSC Limit State based on its safety and performance requirements and (ii)criteria for selecting the Seismic Design Category (SDC) for nuclear facility structures, systems, and components (SSCs) for the purpose of designing SSCs to withstand earthquakes using methods specified in ASCE XX. B. The standard outlines the essential facility data and safety analyses necessary to support the seismic design categorization process.