Document: NUREG-0800
Document ID: 21a62ef6-c280-44b1-8107-aa1888bd76a7
Document Type: srp
Title: Probabilistic Seismic Hazard Analysis and Controlling Earthquakes.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0529/ML052910327.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.5.2.4
CFR Part: 
CFR Title: 

Content:
For the CEUS sites relying on LLNL or EPRI methods and data bases, the staff will review the applicant's PSHA, including the underlying assumptions and how the results of the site investigations are used to update the existing sources in the PSHA, how they are used to develop additional sources, or how they are used to develop a new data base. 2.5.2-5 Rev. 3 - March 1997 The staff will review the controlling earthquakes and associated ground motions at the site derived from the applicant's PSHA to be sure that they are consistent with the controlling earthquakes and ground motions used in licensing (a) other licensed facilities at the site, (b) nearby plants, or (c) plants licensed in similar seismogenic regions, or to be sure the reasons they are not consistent are understood. For the CEUS, a comparison of the PSHA results can be made with the information included as Table 1, which is a very general representation based on technical information developed over the past two decades of licensing nuclear power plants. Table 1 Magnitudes and Distances Within Seismogenic Source Regions of the CEUS Used to Estimate the SSE SEISMIC SOURCES MAGNITUDE DISTANCE TO SITE I (KM) Northern New England 5.8 mb 15 Piedmont - New England 5.6 mb 15 Southern Valley and Ridge 5.7 mb 15 Atlantic Coastal Plain 5.5 mb 15 Gulf Coast 5.4 mb 15 Central Stable Region 5.5 mb 15 Charleston 7.5 Ms Site-specific New Madrid 8.5 Ms Site-specific The applicant's probabilistic analysis, including the derivation of controlling earthquakes, is considered acceptable if it follows the procedures in Regulatory Guide 1.165 and its Appendix C (Ref. 9). Incorporating the results of site investigations into the probabilistic analysis is considered acceptable if it follows the procedure outlined in Appendix E of Regulatory Guide 1.165 and is consistent with the review findings of Sections 2.5.2.2 and 2.5.2.3. In addition to the above reviews for CEUS sites where applicants did not use the LLNL or EPRI methods