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:
ems, and components, and Regulatory Guide 1.102 describes acceptable flood protection to prevent the safety-related facilities from being adversely affected. Technical Rationale12 DRAFT Rev. 3 - April 1996 2.4.4-4 The technical rationale for application of acceptance criteria to reviewing potential dam failures with a potential to affect a nuclear power plant site is discussed in the following paragraphs:13 1. Compliance with GDC 2 requires that nuclear power plant structures, systems, and components important to safety be designed to withstand the effects of natural phenomena such as earthquake, tornado, hurricane, flood, tsunami, and seiche without loss of capability to perform their safety functions. The criterion further specifies that the design bases for these structures, systems, and components shall reflect the following: a. Appropriate consideration of the most severe natural phenomena historically reported for the site and surrounding area, with sufficient margin for the limited accuracy, quantity, and time period in which the historical data have been accumulated; b. Appropriate combinations of the effects of normal and accident conditions with the effects of the natural phenomena; and c. The importance of the safety functions to be performed. This criterion is applicable to SRP Section 2.4.4 because it specifies the hydrologic phenomenon (i.e., flooding associated with dam failure) addressed in this section. In general terms, it also specifies the level of conservatism that must be used to assess the severity of the flood for the purpose of determining the design bases for structures, systems, and components important to safety. Meeting the requirements of GDC 2 provides a level of assurance that structures, systems, and components important to safety have been designed to withstand the most severe flood resulting from dam failure likely to occur.14 2. Section 100.10(c) of 10 CFR Part 100 requires that the site's physical characteristics (including