Document: NUREG-0800
Document ID: 00d3733d-7b45-4276-8765-54fc5ae522d6
Document Type: srp
Title: .3-3
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0423/ML042390212.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.5
CFR Part: 
CFR Title: 

Content:
he detailed geological maps to be used by the staff while examining the excavations will be available. In addition, the staff should require that it be contacted immediately if a fault, not previously identified in the SAR or ESR, is found within 8 km (5 mi) of the plant. In 10 CFR Part 52, a licensing approach is described that may be used in lieu of the 10 CFR. Part 50 two-step procedure of requiring applicants to obtain a Construction Permit, followed several years later after the plant design bases have been approved by the staff, by application for an Operating License. This procedure, called combined licensing; could create a problem for the staff in that the SER will already have been written and the applicant will have a license before excavations are started. Therefore, faults discovered for the first time in the excavations will not have been evaluated by the staff. To alleviate this potential problem, there must be a commitment in the site-specific portion of the SAR for a facility to (1) notify the staff immediately if previously unknown geologic features that could represent a hazard to the plant are encountered in the excavation; (2) geologically map all excavations for Seismic Category I structures, as a minimum; and (3) notify the NRC staff when the excavations are open for examination and evaluation. When faults are identified in the site vicinity or site area, it must be demonstrated that the faults do not have the potential to cause near-surface ground displacement (capable tectonic source) at the site. This is accomplished by determining the ages of the latest displacement on the faults, preferably by stratigraphic methods, that is, identifying strata or a stratum of datable soil or rock overlying the fault that is undeformed by the fault. Other methods include correlating the last faulting event with regional 2.5.3-6 Rev. 3 - March 1997 tectonic activity of known ancient age, geomorphic evidence of age, and determining the relationship between