Document: NRC Regulatory Guide
Document ID: f0baf50b-5bb7-4783-b2f9-9586e09c97e1
Document Type: regulatory_guide
Title: Preparation of Environmental Reports for Nuclear Power Stations + HISTORY - HISTORY 02/2017 – DG-4026 , Proposed Revision 3 09/2014 – Periodic Review of Revision 2 – Revise (Rev. 3)
Source: NRC Regulatory Guide Division 4
Source URL: https://www.nrc.gov/docs/ML1611/ML16116A068.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-4.2
CFR Part: 
CFR Title: 

Content:
eral extraction activities or on floodplains or wetlands (can cross-reference other sections of ER where possible) 5.2 Water Resources (Surface Water and Groundwater) The applicant should describe the hydrologic alterations associated with station operation and the resulting impacts on consumptive and nonconsumptive water uses and on water quality. In evaluating water-related impacts, the applicant should consider the effects of reasonably foreseeable changes in the hydrologic environment (e.g., climate, land use, and water use) over the duration of the license for the region of interest (ROI). 5.2.1 Hydrologic Alterations The applicant should describe the operational activities expected to result in hydrologic alterations at the site, within transmission corridors, and offsite within the ROI. Examples of operational activities that might affect water use and water quality include, withdrawal of water for station use, surface-water diversions, maintenance dredging, groundwater dewatering, and effluent discharge, etc. The description should include analyses of the resulting hydrologic alterations and the physical effects of these alterations on water uses and users (quantity and quality); practices proposed to minimize hydrologic alterations having adverse effects; and an assessment of compliance with the applicable Federal, State, regional, local, and affected American Indian Tribal standards and regulations. Station water use and discharge of effluents during operation are requested in Chapter 3 of this RG. The applicant should identify those water-supply and water-quality conditions under which station operation would be affected (e.g., derating caused by insufficient supply of cooling water). The ER should include a description of the following: • Anticipated hydrologic alterations resulting from station operation. For example, the applicant should discuss alterations in water levels and groundwater heads; alterations in flow rates and circulation patterns