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:
uide 1.59, as supplemented by best current practices, provides guidance for developing the hydrometeorological design bases. Regulatory Guide 1.102 describes acceptable flood protection to prevent the safety-related facilities from being adversely affected. 1. Interface of the Plant with the Hydrosphere: The application should provide a description of hydrology in the vicinity of the site and site regions and of how the plant interfaces with the hydrosphere. 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. Site topographic maps should be of good quality and of sufficient scale to allow independent analysis of pre- and post-construction drainage patterns. Flood maps that show the areas to be inundated by floods of difference magnitude and recurrence interval should be of appropriate scale and quality. All external plant structures and components should be identified on site maps. Data should be provided on surface water users, location with respect to the site, type of use, and quantity of surface water used. Tabulations of drainage areas, types of structures, appurtenances, ownership, seismic and spillway design criteria, elevation-storage relationships, and short and long-term storage allocations should be provided. The description of hydrologic characteristics should correspond to those of the United States Geological Survey (USGS), National Oceanic and Atmospheric Administration (NOAA), Natural Resources Conservation Service (NRCS), U.S. Army Corps of Engineers (USACE), or appropriate State and river basin agencies. Descriptions of all existing or proposed reservoirs and dams (both upstream and downstream) that could influence conditions at the site should be provided. These descriptions may be obtained from reports of the USGS, United States Bureau of Reclamation (USBR), USACE, and others. Generally, reservoir descriptions of a