Document: NUREG-0800
Document ID: aac96014-0cf1-4116-83f5-f791b43a8be8
Document Type: srp
Title: COOLING WATER CANALS AND RESERVOIRS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340550.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.8
CFR Part: 
CFR Title: 

Content:
drologic events, or that alternative conveyance systems are designed to be available during the postulated conditions. 2. The acceptance criteria for the hydraulic design of dams and reservoirs are as follows: a. For protection of structures against wind waves, input from SAR Sections 2.4.3, 2.4.4, 2.4.5, and 2.4.6 for PMF, Probable Maximum Hurricane (PMH), other dam failures, surge, seiche, or tsunami levels and coincident waves and runup must be considered to estab- lish the maximum and minimum water level and wave conditions. Also, normal pool level and coincident probable maximum wind-wave activity must be considered. Criteria and methods as reported in Corps of Engineers publications are generally acceptable for design of embank- ment protection (riprap, grass, soil cement, tetrapods, dolosse, etc.) and freeboard. b. For protection of structures from ice effects such as extreme forces on structures and components, ice blockages of spillways, and inter- ruption of cooling water supply, input from SAR Section 2.4.7 is considered. c. For emergency storage evacuation, the spillways are acceptable if they can safely pass the PMF, or controlling design basis flood, with antecedent or coincident conditions as discussed in Regulatory Guide 1.59, without endangering safety-related facilities or increas- ing the hazard to downstream residents. Model tests may be required for unusual spillway designs. Regulatory Guide 1.125 provides gui- dance in the use and evaluation of physical models. In addition, a low level outlet may be necessary to evacuate the storage in an emergency. d. For reservoir routings, the maximum still water level is acceptable if the spillway design flood has been routed through the spillway (and outlet works, if applicable) using standard methods as suggested by the Corps of Engineers, USBR, and others, and a minimum of three feet of freeboard (including waves) is available. However, the ante- cedent reservoir level to be used with the flood routing