Document: NRC Regulatory Guide
Document ID: 01fb3132-b05a-41a0-ab81-466a6fb6f4d3
Document Type: regulatory_guide
Title: Preparation of Environmental Reports for Nuclear Power Plant License Renewal Applications (Rev. 1)
Source: NRC Regulatory Guide Division 4
Source URL: https://www.nrc.gov/docs/ML0916/ML091620409.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-4.2S1
CFR Part: 
CFR Title: 

Content:
hey will be implemented. If (1) the plant utilizes a once-through or cooling pond heat dissipation system and (2) the applicant does not possess a current Clean Water Act Section 316(b) determination, the ER must consider issues of impingement and entrainment of fish and shellfish. Information that should be provided to the NRC for review and analysis of the impingement and entrainment issue is outlined below. Information and Analysis Content The ER should follow the general approach for information and analysis content for all ecology issues as described at the beginning of this section. Specific guidance for this issue follows: • Document any communications with regulatory agencies (e.g., EPA or other water quality permitting agencies) and resource agencies (e.g., NMFS, U.S. Fish and Wildlife Service, State fish and wildlife agencies) regarding the issues of impingement and entrainment. Provide a copy of any Clean Water Act Section 316(b) determination. If a determination has not been made that the “location, design, construction, and capacity of cooling water intake structures reflect the best technology available for minimizing adverse environmental impact,” discuss the outstanding issues. DG-4015, Page 36 • Briefly summarize any impingement or entrainment studies or monitoring programs and include the location, dates, objective, methods, and results applicable to this license renewal application, as well as any data or data summaries that might be available for NRC review. Provide estimates of the species and numbers of fish and shellfish impinged and entrained on a daily, monthly, and annual basis. Provide site-specific estimates of the mortality of impinged fish and shellfish. • Estimate the number of fish and shellfish lost to the water body because of impingement and entrainment. Provide full documentation of analytical or modeling techniques used to assess entrainment and impingement losses. Describe these losses in terms of the commercial,