Document: NRC Regulatory Guide
Document ID: 239cc7c1-f2cb-46cc-945d-8009db28aa6c
Document Type: regulatory_guide
Title: General Site Suitability Criteria for Nuclear Power Stations + HISTORY - HISTORY 12/2023 – DG-4034 , Proposed Revision 4 12/2011 – DG-4021 , Proposed Revision 3 02/1995 – DG-4004, Second Proposed Revision 2 11/1992 – DG-4003, Proposed Revision 2 (Rev. 4)
Source: NRC Regulatory Guide Division 4
Source URL: https://www.nrc.gov/docs/ML2312/ML23123A090.pdf
Revision Date: 2023-10
Chapter: 
Section ID: RG-4.7
CFR Part: 
CFR Title: 

Content:
wever, other factors, such as distribution of important species, should be considered, and in all cases, experts on the local fisheries should be consulted to ensure that proposed withdrawals will not be excessive. The site should allow for placement of intake structures where the relative abundance of important species is small and where low approach velocities can be attained. (Deep regions are generally less productive than shallow areas. It is not implied that benthic intakes are necessary.) Important habitats should be avoided as locations for intake structures. 2.3.5 Entrapment of Aquatic Organisms To limit the potential for entrapment of aquatic organisms by intake or discharge structures, evaluations of potential sites should consider the requirements of applicable Federal, State, and local regulations. 2.3.5.2 Relevant Statutes and Regulations • Fish and Wildlife Coordination Act, as amended; • Magnuson-Stevens Fishery Conservation and Management Act, as amended; • Clean Water Act section 316(a), as implemented in 40 CFR Part 125, “Criteria and Standards for the National Pollutant Discharge Elimination System”; and • Clean Water Act section 316(b), as implemented in o 40 CFR Part 9, “OMB Approvals Under the Paperwork Reduction Act;” 6 Approach velocity and screen-face velocity are design criteria that may affect the impingement of larger organisms, principally fish, on intake screens. Acceptable approach and screen-face velocities are based on the swimming speeds of fish, which will vary with the species, site, and season. DG-4034, Page 42 o 40 CFR Part 122, “EPA Administered Permit Programs: The National Pollutant Discharge Elimination System;” o 40 CFR Parts 123, “State Program Requirements;” o 40 CFR Parts 124, “Procedures for Decisionmaking; and o 40 CFR Parts 125; “Criteria and Standards for the National Pollutant Discharge Elimination System.” 2.3.5.3 Related Guidance • NUREG-1555, “Standard Review Plans for