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:
lometers (km) (10 miles (mi)) in radius, and the ingestion pathway EPZ generally consists of an area about 80 km (50 mi) in radius. The exact size and configuration of the EPZs should be determined in relation to local emergency response needs and capabilities, as they are affected by such conditions as demography, topography, land characteristics, access routes, and jurisdictional boundaries. Under 10 CFR 100.21(g), an applicant must identify physical characteristics unique to the proposed site that could significantly impede the development of emergency plans. The site and its vicinity, including the population distribution and transportation routes, should be examined and evaluated to determine whether any characteristics would significantly impede actions to protect the DG-4034, Page 21 public in an emergency. Other factors should also be addressed when identifying significant impediments to the development of emergency plans; these include the availability of adequate shelter facilities, local building practices and land use (e.g., outdoor recreation facilities, including camps, beaches, and hunting or fishing areas), and the presence of large institutional or other special needs populations (e.g., schools, hospitals, nursing homes, prisons). An evacuation time estimate (ETE) may be used to identify favorable and unfavorable physical characteristics. The ETE analysis is an emergency planning tool that systematically assesses the feasibility of taking protective measures for the surrounding population. Its value lies in the methodology used for the analysis rather than in the calculated ETEs. While lower ETEs may reflect site characteristics that are favorable for emergency planning, there is no requirement for an applicant to meet a minimum evacuation time. NUREG/CR-7002 gives information on performing ETE analyses. The regulations in 10 CFR 52.17(b)(1) require an ESP applicant’s safety analysis report to identify physical characteristics of the proposed