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:
stimate of local intense precipitation or local probable maximum precipitation (PMP) and a determination of the capacity of site drainage facilities (including drainage from the roofs of buildings and site ponding). Conclusions relating to the potential for any adverse effects of blockage of site drainage facilities by debris, ice, or snow should be based upon conservative assumptions of storm and vegetation conditions likely to exist during storm periods. If a potential hazard does exist (e.g., the elevation of ponding exceeds the elevation of plant access openings), the applicant should document and justify the design bases of affected facilities. 2. Stream Flooding: The application should include documentation of the potential sources of flood and flood response characteristics. Depending on the hydrology in the watershed where the proposed site is located, estimates of tributary contributing area, PMF, coincident wind-induced waves, floods produced due to dam failures, and combinations of less severe river floods with coincident surges and seiches should be provided. 3. Surges: The application should include the complete history of storm surges in the vicinity of the site. Depending on the location of the proposed site, estimates of PMH for coastal areas, PMH winds translated to inland locations, probable maximum windstorm, storm surges and waves resulting from these winds, and combinations of less severe storm surges with runoff floods should be provided. 4. Seiches: The application should include the complete history of seiches in the vicinity of the site. Depending on the location of the proposed site and hydrologic and hydraulic characteristics of nearby water bodies, estimates of meteorologically induced seiches in inland lakes, coastal harbors, and embayments, seismically induced seiches in inland lakes, seiches induced by tsunamis, and a combination of less severe seiches coincident with runoff floods should be provided. 5. Tsunami: The application should