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:
The applicant should describe the hydrologic alterations associated with building activities and the resulting impacts on consumptive and nonconsumptive water use9 and on water quality. Water use and discharge of effluents during building are described as part of the site layout and plant description (Chapter 3). 4.2.1 Hydrologic Alterations The applicant should identify and describe the building activities including site preparation, onsite activities and offsite activities that could result in hydrologic alterations at the site, within 8 Executive Order 11988 (Ref. 54), “Floodplain Management” was issued on May 24, 1977 to restore and preserve the natural and beneficial values served by floodplains. This Executive Order requires agencies to determine whether the proposed action will occur in a floodplain, to evaluate the potential effects of any actions that may take place in a floodplain, and to consider alternatives to avoid adverse effects and incompatible development in floodplains. 9 Consumptive water use reduces the available water supply. For instance, evaporation due to cooling-tower operation results in a transfer of water from the cooling system to the atmosphere, thereby reducing the volume of water in the water source. Nonconsumptive water use does not reduce the available water supply, rather it is discharged back into the river and is not consumed by the plant. DG-4026, Page 63 transmission corridors, and offsite within the region of interest (ROI) (see Chapter 2). 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 impacts; and an assessment of compliance with the applicable Federal, State, regional, local, and affected American Indian Tribal standards and regulations. Activities resulting in hydrological alterations that could affect water use and water