Document: NUREG-0800
Document ID: 64c331f4-7cf6-4155-b7d2-b0087a4254b8
Document Type: srp
Title: PROBABLE MAXIMUM TSUNAMI FLOODING
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070246.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.6
CFR Part: 
CFR Title: 

Content:
also be acceptable if it states the criteria used to determine that tsunami flooding estimates are not necessary to identify the flood design basis (e.g., the site is not near a large body of water). Technical Rationale8 The technical rationale for application of these acceptance criteria to reviewing probable maximum tsunami flooding of a nuclear power plant site is discussed in the following paragraphs:9 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; DRAFT Rev. 3 - April 1996 2.4.6-4 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. The first specification was adopted in recognition of the relatively short history available for severe natural phenomena (e.g., floods) on the North American continent and, when based on probabilistic considerations only, the potential for underestimating the severity of such events. This problem can be avoided by using a deterministic approach to assess design basis events. Such an approach will account for the practical physical limitations of natural phenomena that contribute to the severity of a given event. This criterion is applicable to SRP Section 2.4.6 in that it specifies the hydrologic phenomenon (i.e., tsunami flooding) addressed in this section. In general terms, it