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:
oposed site. Postulated Accidents The geographic area of interest is considered to be the area that has the potential to increase risks at any location within a 50-mi radius of the proposed site. Fuel Cycle, Transportation and Decommissioning The geographic area of interest is a 50-mi radius around the site. DG-4026, Page 123 The timeframe for the analysis incorporates the sum of the effects of the proposed project in combination with past, present, and future actions because impacts may accumulate or develop over time. • Past timeframe is prior to the receipt of the application. In many cases, discussion of the past actions may entail a brief paragraph telling the story of how the resource has changed to its current condition by describing past actions and, as necessary, referring to the baseline discussion in Chapter 2 of the ER. • Present timeframe is from the time of the application until issuance of the final EIS. The present time frame is the shortest among the three time frames and should capture any ongoing actions. Many of the resource areas measure the environment as it currently exists. These measurements capture the cumulative impact to the resource from the past and present projects and should be part of the baseline for the resource in Chapter 2 of the ER. • Future timeframe is from issuance of the final EIS through building and operation of the proposed new unit(s) as well as decommissioning. Future actions are those that are “reasonably foreseeable;” that is, they are ongoing (and will continue into the future), are funded for future implementation, are included in firm, near-term plans, or generally have a high probability of being implemented. In general, the baseline assessment presented in the affected environment for each resource area accounts (Chapter 2) for past and present actions. The direct and indirect impact analyses (Chapters 4 and 5) address the incremental impacts of building and operation. These analyses are referenced in