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:
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 For those plants proposing multiple reservoirs for water supply, analyses must be provided to 1 assure that storage allocated for safety-related water supply in alternate reservoirs will be available during postulated drought conditions. In addition, evidence of the right to use the water consumptively must be documented. 2.4.8-3 DRAFT Rev. 3 - April 1996 embankment 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 interruption 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 increasing the hazard to downstream residents. Model tests may be required for unusual spillway designs. Regulatory Guide 1.125 provides guidance 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, U.S. Bureau of Reclamation (USBR), and others, and a minimum of three feet of 7 freeboard (including waves) is available. However, the antecedent reservoir level to be used with the 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