Document: NUREG-0800
Document ID: 496b5bd8-c9a2-4cf6-a703-e41c51e155ec
Document Type: srp
Title: CHANNEL MIGRATION OR DIVERSION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1819/ML18190A201.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.9
CFR Part: 
CFR Title: 

Content:
ink capabilities. • RG 1.29, “Seismic Design Classification,” identifies the seismic design bases for SSCs important to safety. • RG 1.59, “Flood Design Basis for Nuclear Power Plants,” as supplemented by best current practices, provides guidance for developing the hydro-meteorological design bases. • RG 1.102, “Flood Protection for Nuclear Power Plants,” describes acceptable flood protection measures intended to prevent the safety-related facilities from being adversely affected. These acceptance criteria should be addressed to the extent this flood-causing mechanism is found to be consequential at the power reactor site: 1. Historical Accounts of Channel Migration: To meet the requirements of GDC 2, GDC 44, 10 CFR 52.17, “Contents of applications; technical information,” and 10 CFR 52.79, “Contents of applications; technical information in final safety analysis report,” and 10 CFR Part 100, a complete history of channel migration or diversion at and in the vicinity of the site is needed. A thorough review and identification of the types of natural processes and other destructive phenomena (landslides, channel erosion, breached dikes, etc.), locations and durations of these events, and descriptions of hydrogeological/geomorphic characteristics accompanying these events (both currently and in the past) should be included. This description should be sufficient to establish the potential for channel migration or diversion in the vicinity of the site. This review includes the reactor site and adjacent watersheds displaying similar hydraulic characteristics. 2. Regional Topographic and Geologic Evidence of Channel Migration or Diversion: To meet the requirements of GDC 2, GDC 44, 10 CFR 52.17 and 52.79, and 10 CFR Part 100, a description of regional topographic evidence as it relates to the potential for channel migration or diversion is needed. This description should be accompanied by data where possible and should be sufficient to make an