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:
ojectiles that accompany anticipated flood-generated currents; and the effects of sediment erosion and deposition caused by flooding that may result in blockage or loss of function. For any diversion, migration, or realignment events identified, historical water-flow variations should be noted, as well as the volume of any debris-blocking materials with respect to the channel geometry. 4. Alternate Water Supply Sources: Should channel migration or diversion be found to be consequential at a site, consideration should be given to evaluating alternate safety- related water supplies to the plant. Assessment of alternate water supply sources and operating procedures is addressed in, and should be coordinated with SRP Section 2.4.11 “Low Water Considerations” where the staff reviews availability of 9 FEMA has an extensive flood inundation mapping program. See https://www.fema.gov/guidelines-and-standards-flood-risk- analysis-and-mapping for information on FEMA’s latest inundation mapping standard. 2.4.9-13 Draft Revision 4 – September 2018 alternate sources of safety-related water supply to the plant according to recommendations of RG 1.27. 5. Consideration of Other Site-Related Evaluation Criteria: 10 CFR Part 100 describes site-related proximity, seismic, and non-seismic evaluation criteria for power reactor applications. Subpart A to 10 CFR Part 100 addresses the requirements for applications before January 10, 1997, and Subpart B is for applications on or after January 10, 1997. If the channel migration or diversion flood-causing mechanism is determined to be consequential to defining the design basis flood elevation, the staff’s review should include evaluation of pertinent information to determine if these criteria are appropriately used in postulation of worst-case diversion, migration, or realignment scenario at the proposed plant site. 6. Review Procedures Specific to 10 CFR Part 52 Application Type A. Early Site Permit Reviews Subpart A to 10 CFR Part