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:
cations reflect consideration of any identified unique conditions. These review procedures are based on the identified SRP acceptance criteria. For deviations from these acceptance criteria, the staff should review the applicant’s evaluation of how the proposed alternatives provide an acceptable method of complying with the relevant NRC requirements identified in Subsection II. 2.4.4-7 Revision 3 - March 2007 1. Flood Waves from Severe Breaching of an Upstream Dam: The location of dams and potentially “likely” or severe modes of failure are identified. Failure of a single upstream dam that has the most severe impact on the site should be evaluated using a conservative mode of dam failure, consideration of reservoir level at full pool, and appropriate combination of antecedent flows as described by ANSI/ANS-2.8-1992. Staff use currently accepted models of the U.S. Army Corps of Engineers (USACE) to route the flood wave resulting from the dam breach to the plant site. First-time use of another model will require complete model description and documentation. Acceptance of the model (and subsequent analyses) is based on the staff review of the model’s theory, available verification, and application. If other than instantaneous failure is assumed, the conservatism of the rate of failure and shape of the breach should be well documented. A determination of the peak flow rate and water surface elevation at the site should be presented, along with a description (and the bases) of all coefficients, parameters, and methods used. Instead of an independent analysis, the staff’s review may verify the applicant’s assumptions and methodology or may require consultation with State and Federal agencies that have the authority and the responsibility to carry out similar analyses. 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