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:
fe (i.e., mammals, reptiles, fish, and invertebrates) and any life stages of interest. Analysts should choose survey methods appropriately based on targeted species and life stage to be assessed. They should list each observed species in a table. For each species, the table should provide, at a minimum, the scientific name, common name, habitat location(s), and observation date. The table also should include a description of abundance when possible. The text should explain the data collection methods used. A map should depict habitat coverages and sampling sites. Other field observations useful in evaluating the suitability of aquatic habitats for aquatic biota include the following: • presence of preferred prey or other food source • presence of SAV and refugia • extent and type of substrate • current flow rate • stream channel morphology • pH • water temperature • depth • turbidity • rugosity • dissolved oxygen • salinity or conductivity • nutrient concentrations (e.g., nitrogen and phosphorus) Summary of Common Useful Aquatic Environmental Baseline Data Table 3 summarizes some of the types of aquatic baseline environmental data commonly helpful in supporting NRC licensing actions. The table provides separate information for new reactor licensing (including early site permits, limited work authorizations, construction permits, operating licenses, and combined licenses), relicensing of existing reactors (also termed license renewal), power uprates, and decommissioning. The text discusses the data in more detail. DG-4023, Page 16 Table 3. Types of Aquatic Environmental Baseline Data and Use for Reactor Licensing/Permitting, Relicensing, Power Uprates, and Decommissioning DATA TYPE DATA USE LICENSING/ PERMITTING OPERATING LICENSE RENEWAL POWER UPRATE DECOMMISSIONING Land cover and land use data (various scales and sources) • Site selection • Habitat impacts at the proposed site Habitat impacts from operation and refurbishment Habitat