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:
REVIEW RESPONSIBILITIES Primary - Hydrologic and Geotechnical Engineering Branch (HGEB) Civil Engineering and Geosciences Branch (ECGB)1 Secondary - None I. AREAS OF REVIEW In this section of the safety analysis report (SAR) the hydrogeologic design basis is developed to assure ensure consideration in plant design of any potential hazard to the safety-related facilities 2 due to the failure of upstream and downstream water control structures. The areas of review include consideration of flood waves (bores) from severe breaching of upstream dams and the potential loss of water supply due to failure of a downstream dam, domino-type failures of dams, landslides, and effects of sediment deposition and erosion. When data are provided to show that seismic events will not cause failures of upstream dams that could produce the governing flood at the plant, this section may contain additional data and other information to support a contention that the dams are equivalent to seismic Category I structures and will survive a local equivalent of the safe shutdown earthquake (SSE) or will survive the operating basis earthquake (OBE). In such cases, the Geotechnical Engineering 3 Section (GES) of HGEB, the Geosciences Branch (GB), and Structural Engineering Branch (SEB), as necessary, ECGB will evaluate the data necessary to justify such a classification. 4 GES, GB, and SEB ECGB review procedures are outlined in the appropriate geosciences and 5 structural SRP Standard Review Plan (SRP) sections. The balance of this SRP section applies 6 to the hydrologic analyses of dam failures or breaches. DRAFT Rev. 3 - April 1996 2.4.4-2 Where analyses are provided in support of either a conclusion that a probable maximum flood (PMF) should be the design basis flood for a stream, or that a postulated 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