Document: NUREG-0800
Document ID: a08d9554-4808-4bfa-a7ae-35542b0fea1f
Document Type: srp
Title: VIBRATORY GROUND MOTION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340591.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.5.2
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Structural and Geosciences Branch (ESGB) l Secondary - None I. AREAS OF REVIEW The Structural and Geosciences Branch review covers the seismological and geological investigations carried out to establish the acceleration for the safe shutdown earthquake (SSE) and the operating basis earthquake (OBE) for the site. The safe shutdown earthquake is that earthquake that is based upon an evaluation of the maximum earthquake potential considering the regional and local geology and seismology and specific characteristics of local subsurface material. It is that earthquake that produces the maximum vibratory ground motion for which safety-related structures, systems, and components are designed to remain functional. The operating basis earthquake is that earthquake that, considering the regional and local geology, seis- mology, and specific characteristics of local subsurface material, could reasonably be expected to affect the plant site during the operating life of the plant; it is that earthquake that produces the vibratory ground motion for which those features of the nuclear power plant necessary for continued operation without undue risk to the health and safety of the public are designed to remain functional. The principal regulation used by the staff in determining the scope and adequacy of the submitted seismologic and geologic information and attendant procedures and analyses is Appendix A, "Seismic and Geologic Siting Criteria for Nuclear Power Plants" to 10 CFR Part 100 (Ref. 1). Additional guidance (regulations, regulatory guides, and reports) is provided to the staff through References 2 through 8. Specific areas of review include seismicity (Subsection 2.5.2.1), geologic and tectonic characteristics of the site and region (Subsection 2.5.2.2), correlation of earthquake activity with geologic structure or tectonic Rev. 2 - August 1989 USNRC STANDARD REVIEW PLAN Standard review plans are prpared for the guidance of the Office of