Document: NUREG-0800
Document ID: 4e1c316a-99c2-4fd3-9d9b-323791bd85f8
Document Type: srp
Title: SHORT-TERM ATMOSPHERIC DISPERSION ESTIMATES FOR ACCIDENT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070730398.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.3.4
CFR Part: 
CFR Title: 

Content:
be engineered into the facility, including the plant design features intended to mitigate the radiological consequences of accidents, are adequate to ensure that the offsite radiological consequences of accidents meet specified radiation dose guidelines for the EAB and LPZ. Verification that the major SSCs of the facility that bear significantly on the acceptability of the proposed facility on the site are adequate to meet EAB and LPZ dose criteria under accident conditions is accomplished by calculating expected offsite radiation doses using (a) an assumed inventory of fission products available for release from the containment building, (b) the expected containment leak rate, and (c) site atmospheric 2.3.4-7 Revision 3 - March 2007 dispersion characteristics. Atmospheric dispersion characteristics are determined from meteorological measurements taken at the proposed plant site. Guidance on the onsite meteorological program needed to obtain meteorological data is provided in Regulatory Guide 1.23, and models for calculating the atmospheric dispersion for the EAB and LPZ are provided in Regulatory Guide 1.145. III. REVIEW PROCEDURES The reviewer will select material from the procedures described below, as may be appropriate for a particular case. The procedures outlined below are used to review CP applications, ESP applications, and COL applications that do not reference an ESP to determine whether appropriate atmospheric dispersion models, with adequate onsite meteorological data as input to the models, have been used to calculate atmospheric dispersion factors at appropriate locations from postulated release points during accidental airborne radiological and hazardous material releases. For reviews of OL applications, these procedures are used to verify that the data and analyses remain valid and that the facility’s design specifications are consistent with these data. As applicable, reviews of OLs and COLs include a determination on whether the content of