USNRC STANDARD REVIEW PLAN

structures, systems, and components important to safety be designed to withstand the effects of earthquakes without loss of capability to perform their safety functions. The earthquake for which these plant features are designed is defined as the safe shutdown earthquake (SSE) in 10 CFR Part 100, Appendix A. The SSE is based upon an evaluation of the maximum earthquake potential and is that earth-quake which produces the maximum vibratory ground motion for which structures, systems, and components important to safety are designed to remain functional. Those plant features that are designed to remain functional if an SSE occurs are designated seismic Category I in Regulatory Guide 1.29. The MEB reviews the seismic classification of those structures, systems, and components (including their foundations and supports) which are important to safety and are designed to withstand, without loss of function, the effects of a SSE and specified as seismic Category I by the applicant in his safety analysis report (SAR). This review which is coordinated with each branch that has primary review responsibility for these plant features is performed for both construction permit (CP) and operating license (OL) applications. The MEB review of seismi