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:
ate sections of the following Regulatory Guides are used by the staff for the identified acceptance criteria: Regulatory Guide 1.27 describes the applicable ultimate heat sink capabilities. Regulatory Guide 1.29 identifies seismic design bases for SSC important to safety. Regulatory Guide 1.59, as supplemented by best current practices, provides guidance for developing the hydrometeorological design bases. Regulatory Guide 1.102 describes acceptable flood protection to prevent the safety-related facilities from being adversely affected. 1. Flood Waves from Severe Breaching of an Upstream Dam: To meet the requirements of GDC 2, 10 CFR 52.17, 10 CFR Part 100, and 10 CFR 100.23(d), estimates of the following characteristics are needed, and should be based on conservative assumptions of hydrometeorological, geological, and seismic characteristics in the drainage area: (a) modes of assumed dam breaches or failures, (b) consideration of flood control reservoirs at full pool level, and (c) conservatism of coincident flow rates and water surface elevations. Flood waves produced by postulated dam failure scenarios should be routed to the proposed plant site to conservatively estimate the most severe flood water surface elevation that may affect SSC important to safety. 2. Domino-Type or Cascading Dam Failures: To meet the requirements of GDC 2, 10 CFR 52.17, 10 CFR Part 100, and 10 CFR 100.23(d), an appropriate configuration of the cascade of dam failures and its potential to produce the largest flood adjacent to the plant site is needed. Several possible cascading dam failures should be investigated, including those induced by seismic and hydrological failures. The failure modes should be conservatively chosen and the resulting flood waves should be conservatively routed to the proposed plant site to estimate the most severe flood water surface elevation that may affect SSC important to safety. 3. Dynamic Effects on Structures: To meet the requirements of GDC 2, 10 CFR