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:
will be detectable or may destabilize or noticeably alter population levels, then continue the analysis at Step (3). Other- wise, prepare a statement for the SEIS describing the potential for thermal impacts to aquatic biota at the site that ` summarizes the permitting information, species data, and methods for quantifying thermal stresses due to heat shock to aquatic biota that have been reviewed ` states that there are no populations of “important” aquatic biota present in the vicinity of the site that will be adversely affected by plant-cooling-system thermal discharges to the point where changes in their population levels are detectable ` concludes that, because aquatic biota populations will remain stable even if some are affected by heat shock, the cooling-system discharge impacts on aquatic biota are SMALL within the context of the analysis in NUREG-1437 and that mitigation is not warranted. (3) Determine and assess the levels of potential biological impacts. ` Consider the biological effects of thermal, chemical, and physical alterations to the receiving water body on the identified “important” aquatic species, including combined effects (e.g., thermal plus chemical effects) and the potential for gas-bubble disease. October 1999 5.3.2.2-7 NUREG-1555 ` Give particular attention to the relationship of these stresses to life history requirements (e.g., growth, reproduction, migration). ` Evaluate the discharge system impacts of the plant as described below. Procedures for reviewing specific impacts of thermal, chemical, and physical alterations are listed below. Analyze the impacts for the parameter when considered alone and the impacts for the parameter when combined with other parameters. The review should be based on general habitat types such as ` rivers and streams ` lakes and reservoirs ` estuaries ` seacoast. Thermal Effects The reviewer should consider species in the vicinity of the station and their susceptibility to thermal effects. (1)