Document: NUREG-0800
Document ID: 8b98402f-b225-4b85-948c-c6f2a4cb5e09
Document Type: srp
Title: POTENTIAL DAM FAILURES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070242.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.4
CFR Part: 
CFR Title: 

Content:
tulated or arbitrarily assumed dam failure flood is the design basis flood for a stream, the areas of review consist of the following: 1. Conservatism of modes of assumed dam failure and deposition of debris downstream. 2. Consideration of flood control reservoirs at full pool level. 3. Conservatism of coincident flow rates and levels, depending on whether failure is postulated with an equivalent SSE coincident with a 25-year flood or an OBE coincident 7 with a standard project flood (SPF). An SPF is considered to be about forty percent of a PMF. 4. Flood wave attenuation to downstream dams or to the site, whichever would be encountered first. 5. Potential for multiple dam failures; flood wave effects and potential for failure of downstream dams. 6. Hydraulic failure as a result of overtopping for any reason. 7. Dynamic effects of possible bores on exposed plant facilities. 8. Conservative flow conditions for downstream dam failures that can influence safety-related water supplies. 9. Applicability and conservatism of models used to predict the effects of dam failure floods including breach shape and rate of failure. II. ACCEPTANCE CRITERIA Acceptance criteria for this SRP section are based on meeting the requirements of the following regulations: 1. General Design Criterion 2 (GDC 2) as it relates to structures, systems, and components important to safety being designed to withstand floods. 2. 10 CFR Part 100 as it relates to evaluating hydrologic features of the site. 3. 10 CFR Part 100, Appendix A, as it relates to establishing the design basis flood due to seismic dam failure. To meet the requirements of GDC 2; 10 CFR Part 100; and 10 CFR Part 100, Appendix A, as they relate to dam failures, the following specific criteria are used: 2.4.4-3 DRAFT Rev. 3 - April 1996 The staff will review the applicant's analyses and independently assess the coincident river flows at the site and at the dams being analyzed. ANSI N170 provides guidance on acceptable river 8 flow