Document: NUREG-0800
Document ID: cbcf5b42-aac8-43cf-a267-4f72f2392f37
Document Type: srp
Title: HYDROLOGIC DESCRIPTION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0701/ML070100646.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.1
CFR Part: 
CFR Title: 

Content:
re regions, the regional and local ground water environments, and existing or proposed water control structures (located both upstream and downstream; characteristics such as location, size, capacity, type, seismic design criteria, and operational details). The review procedure consists of evaluating the completeness of the information and data by sequential comparison with information available from references. An important facet of the review procedure for this and other SRP sections in hydrological areas is the site visit. The site visit provides the technical reviewers with independent confirmation of hydrological characteristics of the site and adjacent environs. The site visit is discussed in Appendix A to this SRP section. A site audit may also be scheduled during the site visit to support the staff’s review by detailed discussions of the applicant’s data, methods, and conclusions. 2. Hydrological Causal Mechanisms: The staff reviews hydrology in the vicinity of the site and site regions to identify various feasible flooding mechanisms. Subsequent sections of the SRP review these mechanisms with respect to specification of site characteristics related to flood water elevation and specification of design bases of safety-related SSC. Historical flooding conditions can be ascertained using streamflow data available from the USGS. The description and elevations of safety-related structures, facilities, and accesses thereto should be sufficiently complete to allow evaluation of the impact of flood design bases. The staff reviews historical hydrometeorological data to determine the frequency of low- water conditions, such as those during droughts. Streamflow data for rivers and streams in the vicinity of the site may be obtained from the USGS. Meteorological data included in the SAR may be obtained from NOAA’s National Climatic Data Center, Regional Climate Centers, or State Climate Offices. The USACE Cold Regions Research and Engineering Laboratory holds