Document: NUREG-0800
Document ID: 9ec109d9-dfac-443f-a128-99771d0f5c88
Document Type: srp
Title: FLOODS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0701/ML070100647.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.2
CFR Part: 
CFR Title: 

Content:
ic 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 relevant to SRP Section 2.4.2 in that it specifies the hydrological phenomenon (i.e., flooding) addressed in this section. In general terms, it also specifies the level of conservatism that should be used to assess the severity of the flood for the purpose of determining the design bases for the SSC important to safety. This is a similar standard as that applied in reviewing ESPs or COLs. Meeting the requirements of this criterion provides a level of assurance that SSC important to safety have been designed to withstand the most severe flood likely to occur. 2. Sections 100.10(c) and 100.20(c) of 10 CFR Part 100 requires that the site’s physical characteristics (including seismology, meteorology, geology, and hydrology) be taken into account when determining its acceptability for a nuclear power reactor. To satisfy the hydrological requirements of these sections, the applicant’s SAR should contain a description of the surface and subsurface hydrological characteristics of the site and region and an analysis of the PMF. This description should be sufficient to assess the acceptability of the site and to assess the potential for those characteristics to influence the design of plant SSC important to safety. Meeting this requirement provides a level of assurance that plant SSC important to safety are designed to withstand appropriately severe hydrological phenomena. III. REVIEW PROCEDURES The reviewer will select material from the procedures described below, as may be appropriate for a particular case. 2.4.2-9 Revision 4 - March 2007 The procedures outlined below are used to review CP applications, ESP applications, and COL applications that do not reference an ESP to determine whether data and analyses for the proposed site meet the acceptance criteria given in