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:
idered in the consequence assessment, including the air, ground, food, surface water, and groundwater. The applicant should provide the following information to support the NRC staff’s environmental review of severe accidents: • reference for the reactor design and the associated PRA (through Level 2) used in the severe accident risk analysis; • list of severe accident release sequences and their associated core damage frequencies from the Level 1 PRA and source terms for internally initiated events, fire events, flooding events, low power and shutdown events, and externally initiated events (e.g., high winds and earthquakes) as determined from the Level 2 PRA; • description of the methodology in NUREG/CR-6613, “Code Manual for MACCS 2: Volume 1, Users Guide,” MELCOR Accident Consequence Code System (MACCS2 code) (Ref. 74 or current version) used to estimate site-specific severe accident risks (i.e., Level 3 PRA); input and output files used in the analysis should be provided to the NRC staff for confirmatory review; • description of the meteorological data and years used in the analysis and an estimate of severe accident population dose risks from the air pathway • description of any emergency response scenarios, including evacuation, sheltering, and dose- dependent relocation assumptions used in the analysis; • description of the demographic and population data used in the analysis based on the 50-mi population estimate for the year operation is expected to cease; • description of the land-use characterization (e.g., farmland) and land fractions used in the analysis and an estimate of the contaminated land area risks from severe accidents; • description of the food pathway model information for the nuclides to be considered, crop categories to be used, transfer factors, and possible mitigative actions; • description of the economic input data (e.g., land values, relocation costs, and cleanup costs) used in the analysis and an estimate of