Document: NUREG-0800
Document ID: 223f4b43-406b-4b45-903d-f3f8e31d0b7a
Document Type: srp
Title: POTENTIAL DAM FAILURES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070730417.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.4
CFR Part: 
CFR Title: 

Content:
yses. 2. Domino-Type or Cascading Dam Failures: The potential for multiple, seismically or hydrologically induced dam failures and the domino failure of a series of dams should be discussed. Plausible permutations of cascading failures should be described. A summary analysis (that substantiates the selected condition as the critical permutation) is presented. Appropriate antecedent flow conditions as described by ANSI/ANS-2.8- 1992 are considered, and the resulting flood is routed to the site using the currently accepted model of the USACE to estimate the peak flow rate and water surface elevation. A description and bases of all coefficients, parameters, and methods are presented. Instead of an independent analysis, the staff’s review may verify the applicant’s assumptions and methodology or require consultation with State and Federal agencies that have the authority and the responsibility to carry out similar analyses. 3. Dynamic Effects on Structures: Locations of SSC important to safety with respect to the worst flood caused by dam failure should be documented. Hydraulic characteristics of the flood that may be used to estimate dynamic effects of the flood waves include hydrodynamic forces and impact forces of waterborne debris and projectiles. These hydraulic characteristics may include velocities and momentum fluxes near or at SSC important to safety. 4. Loss of Water Supply Due to Failure of a Downstream Dam: The safety-related water supply to the plant that may be impacted by failure of a downstream dam should be identified. The reduction in capacity of the safety-related source of water after failure of the downstream dam should be estimated. It should be demonstrated that the reduced capacity after failure of the downstream dam is sufficient to meet the safety function of the source, or that an alternate source of safety-related water supply exists that is also not similarly affected. 5. Effects of Sediment Deposition and Erosion: Sediment deposition