Document: NUREG-0800
Document ID: d1de2ef3-6098-4e90-988e-9f6478b2ed47
Document Type: srp
Title: SITE PARAMETERS (Tier 1)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070656.pdf
Revision Date: 2023-06
Chapter: 14
Section ID: 14.3.1
CFR Part: 
CFR Title: 

Content:
s for Tier 1, and their acceptability. Site parameters should be specified for the following parameters: Maximum ground water level Maximum flood level Precipitation (rain and snowfall) Ambient Design Temperature Extreme Wind Tornado (maximum speed, pressure drop, missile spectra) 14.3.1-3 DRAFT Rev. 0 - April 1996 Soil Properties (minimum bearing capacity, minimum shear wave velocity, liquefaction potential) Seismology (SSE response spectra, using figures) Meterological Dispersion (Values at EAB and LPZ at appropriate time intervals for short and long term) The site parameters should include a requirement that liquefaction not occur underneath structures, systems, and components resulting from the site-specific SSE. In addition, although the design for the sites should be based on the 0.3g Regulatory Guide 1.60 spectra, the evaluation of the sites for liquefaction potential should use the site-specific SSE with acceptance criteria demonstrating adequate margin for no liquefaction. Site parameters for external missile spectra should be specified in Tier 1. Alternatively, the design basis for missiles may be specified in the DCD Tier 2, provided that external missiles are adequately addressed in the design for buildings and structures, and verified by appropriate ITAAC. An applicant for a combined license shall include a commitment in the site specific portion of the SAR for a facility to: (1) notify the staff immediately if previously unknown geologic features, such as faults, liquefiable soils, etc, are encountered during excavations at the site; (2) geologically map all excavations for Seismic Category I structures, as a minimum; and (3) notify the staff when the excavations are open for examination and evaluation. An applicant for a combined license must demonstrate that the site parameters in the design certification rule are met at a given site as part of an application and issuance of a combined license under Subpart C of 10 CFR Part 52. If the site cannot