Document: NUREG-0800
Document ID: 482aa99f-2f4b-4e4c-b6c4-3ad5b3d83b59
Document Type: srp
Title: COOLING WATER CANALS AND RESERVOIRS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070730431.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.8
CFR Part: 
CFR Title: 

Content:
on in reservoirs is determined by routing the flow during the design basis drought, determined during review of SAR Section 2.4.11, through the reservoir using standard methods suggested by the USACE. If the reservoir storage is the sole source of water supply, the antecedent reservoir levels during the routing should be the lowest reasonably possible, considering regional conditions at the beginning of the drought and water demands including plant requirements. Staff will not use an antecedent reservoir level greater than the established normal operating level. 2.4.8-9 Revision 3 - March 2007 If reservoirs comprise a part of the ultimate heat sink, the staff reviews the design bases of these reservoirs, as recommended by Regulatory Guide 1.27. The volume of liquid water stored in a reservoir that comprises part of the ultimate heat sink should be sufficient to meet all safety-related water-supply requirements after accounting for loss in storage capacity due to seepage, sedimentation, evaporation, ice-sheet formation, and other causes. If the staff’s review disagrees with the applicant’s estimates of these design bases, the applicant should fully document and justify its estimates or accept the staff’s estimates and redesign safety-related reservoirs. The suggested criteria of Regulatory Guide 1.27 should be applied when the water supply comprises part of the ultimate heat sink. 4. Consideration of Other Site-Related Evaluation Criteria: 10 CFR Part 100 describes site-related proximity, seismic, and non-seismic evaluation criteria for power reactor applications. Subpart A to 10 CFR Part 100 addresses the requirements for applications before January 10, 1997, and Subpart B is for applications on or after January 10, 1997. The staff’s review should include evaluation of pertinent information to determine if these criteria are appropriately used in postulation of design bases of safety-related canals and reservoirs at the proposed plant site. 5. Review