Document: NUREG-0800
Document ID: aa991707-7fa7-4f81-b272-8b2d0af4f5e9
Document Type: srp
Title: COOLING WATER CANALS AND RESERVOIRS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070250.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.8
CFR Part: 
CFR Title: 

Content:
e flood routing must be at least as high as that suggested by Regulatory Guide 1.59. e. The probable minimum low water level is acceptable if the flow during the design basis drought (from SAR Section 2.4.11) has been routed through the reservoir1 using standard methods as suggested by the Corps of Engineers, USBR, and others. The antecedent reservoir level for this routing, if reservoir storage is the sole water supply source, must be the lowest reasonably possible, considering regional conditions at the beginning of the drought and water demands, including plant requirements. In no case should the antecedent reservoir level be greater than the established normal operating level. f. Where not covered above, the hydraulic design for the low-level outlets, conduits, spillways (gated and ungated, regulating and emergency), and embankment protection is required where the failure of such items could constitute a threat to essential plant facilities or to safety-related water supplies. The design is acceptable if standard techniques have been used as suggested by the Corps of Engineers, USBR, and others such that the minimum design water level for safety-related pumps would not be violated. DRAFT Rev. 3 - April 1996 2.4.8-4 g. If reservoirs comprise a part of the ultimate heat sink, Regulatory Guide 1.27 is used as a basis for judging the adequacy of the design criteria and provisions. 3. Applicable portions of the following documents are to be used to determine the acceptability of the applicant's data and analyses. Regulatory Guide 1.59 discusses the design basis for flooding. Regulatory Guide 1.29 identifies the safety-related structures, systems, and components and Regulatory Guide 1.102 describes acceptable flood protection to prevent the safety-related facilities from being adversely affected. Regulatory Guide 1.27 describes design criteria and provisions which the ultimate heat sink must meet. Regulatory Guide 1.125 provides guidance on the use of physical models