Document: NUREG-0800
Document ID: 9ec109d9-dfac-443f-a128-99771d0f5c88
Document Type: srp
Title: FLOODS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0701/ML070100647.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.2
CFR Part: 
CFR Title: 

Content:
E coincident with a SPF and 2-year wind waves, from failure of one or multiple dams during other earthquakes of lesser intensity coincident with runoff, surge, or seiche flooding, and from breaches of water control structures that may be located above the site grade and sufficiently near safety- related SSC. 7. Flooding Caused by Landslides: The application should include the flooding hazard at the plant site from flood waves induced by landslides and backwater effects due to stream blockage from landslides. A thorough review of historical landslides and potential for landslides including any historical flooding caused by them in the vicinity of the site and site regions should be presented. The effects of landslide-induced flooding in the plant design bases should be considered. 8. Effects of Ice Formation in Water Bodies: The application should include information concerning potential flooding at the plant site due to flood waves resulting from the collapse of an ice dam or backwater effects due to stream blockage due to an ice dam or an ice jam downstream of the plant site. A thorough review of historical ice formation in the vicinity of the site and site regions should be presented and its effects should be appropriately accounted for in plant design bases. A thorough review of the history of frazil and anchor ice and an estimate of the flooding effects of these phenomena on plant design bases should be provided. 9. Combined Events Criteria: The application should include information concerning design basis flooding at the plant site, including consideration of appropriate combinations of individual flooding mechanisms in addition to the most severe effects from individual mechanisms themselves. The highest flood water surface elevation should be determined based on consideration of the worst combination of flooding mechanisms and is reported as a site characteristic in the staff’s SER. 10. Consideration of Other Site-Related Evaluation Criteria: The