Document: NUREG-1555
Document ID: b5d0daf9-9138-4935-a8fb-b1fed4498171
Document Type: esrp
Title: DISCHARGE SYSTEM
Source: NUREG-1555
Source URL: https://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr1555/initial/
Revision Date: 2007-10
Chapter: 5
Section ID: 5.3.2
CFR Part: 
CFR Title: 

Content:
ted by the proposed plant operation are described in sufficient detail to permit assessment of the predicted impacts. The reviewer should take the following steps: (1) Coordinate with the reviewer for ESRP 5.3.2.2 to ensure that those biotic environmental factors (e.g., aquatic biota) most likely to be impacted by the thermal discharge are described in sufficient detail to permit assessment of the predicted changes or impacts. If the proposed plant is to be located at a station with an existing generating plant and the proposed plant thermal discharges will be mixed with thermal discharges from the existing plant, limit the analysis (and subsequent evaluation) to the incremental impacts resulting from operation of the proposed plant. (2) Determine dilution factors at specific receiving water body locations when requested to do so by the reviewers for ESRPs 5.4 or 5.5. (3) Consider impacts that may result from operation of the following: ` once through cooling systems starting at the condenser discharge ` cooling towers, including helper towers, starting at the point of the cooling tower water blowdown ` spray canals, including helper spray canals, starting at the point of the spray canal water blowdown ` cooling lakes and multi-purpose cooling ponds, starting at the point of the condenser discharge October 1999 5.3.2.1-7 NUREG-1555 ` cooling ponds used only for heat dissipation, starting at the point of pond discharge to receiving water bodies. (4) Scale the scope of the analysis to the level of the anticipated impacts. ` If the thermally affected discharge area will be relatively small and have low ecological impacts, then use simple methods of analysis and conservative assumptions. ` If the available data indicate a significant potential for problems, such as development of a thermal block, recirculation of heated effluent to the cooling water intake and thermal buildup, discharge plumes attaching to shorelines, violation of thermal standards, or important impacts