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:
sions. Include any permits necessary for liquid-waste disposal at the site The applicant should then describe the expected impacts to air quality associated with the emissions of nonradioactive waste. 5.11 Environmental Impacts of Postulated Accidents The applicant should evaluate the radiological consequences to the environment from potential accidents at the proposed site. The term “accident” refers to any off-normal event that results in the release of radioactive materials into the environment. The evaluation should be generic for design DG-4026, Page 107 certifications (DCs), site-specific for all other applications, and focus on events that could lead to releases substantially in excess of permissible limits for normal operations (i.e., design-basis accident (DBAs) and severe accidents). Severe accident mitigation alternatives (SAMAs) should be evaluated to determine if there are any procedures, training activities, or plant-design alternatives (i.e., severe accident mitigation design alternatives (SAMDAs)) that could significantly reduce environmental risks at the site. The applicant’s evaluation should be performed in accordance with the current version of NRC guidance documents, such as for the performance of cost-benefit analysis. 5.11.1 Design-Basis Accidents The applicant should evaluate DBAs using site-specific data and realistic meteorology (i.e., 50th percentile) to estimate doses at offsite locations. Design basis accidents include a spectrum of events that the plant should be designed specifically to accommodate. The radiological consequences of the DBAs are assessed to demonstrate that the plant can be sited and operated without undue risk to the health and safety of the public. The resulting doses should be compared to relevant dose criteria used in the NRC staff’s safety review of DBAs (see NURG-0800, Chapter 15). The applicant should provide the following information to support the NRC staff’s environmental review of DBAs: • list and