Document: NUREG-0800
Document ID: c41ee259-fb35-4539-bbe5-ca79a00f9f6f
Document Type: srp
Title: COOLING WATER SUPPLYLOW WATER CONSIDERATIONS1
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070258.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.11
CFR Part: 
CFR Title: 

Content:
uired alternative water supply sources to ensure the continuity of the water supply. b. The Mechanical Engineering Branch (EMEB) ascertains, on request by ECGB, whether mechanical effects are properly considered in the mechanical design bases of the plant. (Such requests are based on evidence of potential mechanical effects.) c. The Emergency Preparedness and Radiation Protection Branch (PERB) is consulted whenever design criteria are not firmly established. d. The Human Factors Assessment Branch (HHFB) ascertains whether emergency procedures required for conversion to an alternate water source are adequate.14 For those areas of review identified as part of the primary responsibility of other branches, the acceptance criteria and methods of application are contained in the referenced SRP section.15 II. ACCEPTANCE CRITERIA Acceptance criteria for this SRP section relate to the following regulations: 1. General Design Criterion 2 (GDC 2) requires that structures, systems, and components important to safety be designed to withstand the effects of natural phenomena. 2. General Design Criterion 44 (GDC 44) requires an ultimate heat sink capable of accepting the plant's heat load under normal and accident conditions. 3. 10 CFR Part 100 requires that hydrologic characteristics be considered in the evaluation of the site. 4. 10 CFR Part 100, Appendix A requires, in part, that consideration of river blockages or diversion or other failures which may block the flow of cooling water, tsunami runup and DRAFT Rev. 3 - April 1996 2.4.11-4 drawdown, and dam failures be included in the evaluation of the adequacy of the emergency cooling water supply. To meet the requirements of the hydrologic aspects of the above regulations, the following specific criteria are used: Acceptance is based principally on the adequacy of the ultimate heat sink to supply cooling water for normal operations, anticipated operational occurrences, and for safe shutdown, 16 cooldown (first 30 days), and