Document: NRC Regulatory Guide
Document ID: e5306f4f-dc8c-4f60-a71c-af7ad4080384
Document Type: regulatory_guide
Title: Aquatic Environmental Studies for Nuclear Power Stations + HISTORY - HISTORY 12/2014 – DG-4023 -Proposed New Guide
Source: NRC Regulatory Guide Division 4
Source URL: https://www.nrc.gov/docs/ML1318/ML13186A085.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-4.24
CFR Part: 
CFR Title: 

Content:
and nutrient loads to aquatic habitats through runoff and other such nonpoint sources. Areas subject to direct and indirect operational impacts, such as entrapment; impingement; entrainment; thermal, chemical, and physical effects from discharge; and other pollution (e.g., in-water noise) Map the areal extent of anticipated impacts during varying operational and seasonal conditions. For example, map the three-dimensional hydraulic zone of influence from cooling water intake operation, and map the three-dimensional spatial extent of the discharge plume to determine type of species and proportion of population as well as habitat that would be adversely affected. Areas not subject to direct impact but for which information is needed to understand the spatial context and connectivity of affected areas Map existing conditions in the vicinity of the proposed and alternative sites. Contextual maps facilitate impact analysis and regional quantification. Additionally, identification of important local and regional habitats is critical for proper cumulative impact analysis and potential mitigation activities. DG-4023, Page 13 • Disease vectors, pests, or nuisance species. Describe which species occur in the vicinity of the proposed and alternate sites, transmission lines, and pipelines. Also, if any such species do not yet occur in the vicinity but are anticipated to spread to the area within 40 years, describe the scenario. Examples include etiologic agents, including thermophylic bacteria (e.g., Vibrio spp.), thermophylic amoebas (e.g., Naegleria fowleri), and harmful algal blooms (e.g., Karenia brevis); biofouling organisms, such as invasive nuisance species such as the Asian clam and zebra mussel (Dreissena polymorpha); potential intake-clogging biota, such as water primrose (Ludwigia spp.), water hyacinth, and hydrilla (Hydrilla spp.) as well as jellies (e.g., pink comb jelly (Beroe ovata)), anchovies (e.g., bay anchovy (Anchoa mitchelli)), cownose rays (Rhinoptera