Document: NUREG-0800
Document ID: ebff6c02-bdd3-4751-9e36-9347caf05c8e
Document Type: srp
Title: and 2.4.6 are applicable to low water estimates due to the various phenomena discussed.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070258.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.5
CFR Part: 
CFR Title: 

Content:
water to safety-related structures, systems, and components.23 3. Compliance with 10 CFR Part 100 requires, in part, that hydrologic characteristics be considered in the evaluation of a nuclear power plant site. 10 CFR Part 100 applies to this SRP section because the reviewer verifies that the applicant's SAR contains a description of surface and subsurface hydrological characteristics of the site and region. The ultimate heat sink for the cooling water system consists of water sources affected by, among other things, site hydrological characteristics that may reduce or limit the available supply of cooling water for safety- related structures, systems, and components. 2.4.11-7 DRAFT Rev. 3 - April 1996 Meeting the requirements of 10 CFR Part 100 provides assurance that plant structures, systems, or components important to safety are designed to withstand appropriately severe hydrologic phenomena and are capable of performing their intended safety functions.24 4. Compliance with Appendix A to 10 CFR Part 100 requires, in part, that consideration of river blockages or diversion or of other failures that may block the flow of cooling water, tsunami runup and drawdown, and dam failures be included in the evaluation of the emergency cooling water supply. Appendix A to 10 CFR Part 100 applies to this SRP section because the ultimate heat sink for the cooling water system consists of water sources that are subject to natural events that may reduce or limit the available supply of cooling water (i.e., the heat sink). Natural events such as river blockages or diversion or other failures that may block the flow of cooling water, tsunami runup and drawdown, and dam failures must be conservatively estimated to assess the potential for these characteristics to influence the design of plant structures, systems, and components important to safety. Meeting the requirements of Appendix A to 10 CFR Part 100 provides assurance that plant structures, systems, and components important