Document: NUREG-0800
Document ID: 37e64905-5f3c-4221-9ce6-b3089b164d6f
Document Type: srp
Title: LONG-TERM DIFFUSION ESTIMATES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070237.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.3.5
CFR Part: 
CFR Title: 

Content:
e Civil Engineering and Geosciences Branch (ECGB), under SRP Section 2.3.6 (proposed), reviews the adequacy of the site parameter envelope specified in standard design certification applications.8 II. ACCEPTANCE CRITERIA Characterization of atmospheric transport and diffusion conditions is necessary for estimating the radiological consequences of routine releases of radioactive materials to the atmosphere to demonstrate compliance with the numerical guides for doses contained in 10 CFR Part 50, Appendix I. The following regulatory guides provide acceptable criteria for complying with this SRP Standard Review Plan (SRP) section: 9 1. Regulatory Guide 1.109 presents identification criteria to be used for specific receptors of interest. 2. Regulatory Guide 1.111 provides criteria for characterizing atmospheric transport and diffusion conditions for evaluating the consequences of routine releases. Use of the model described in NUREG-0324 NUREG/CR-2919 is acceptable. 10 3. Regulatory Guide 1.112 presents identification criteria to be used for release points and release characteristics. Specifically, for CP, OL, COL, or early site permit reviews, the following information should 11 be provided by the applicant in the safety analysis report (SAR): 1. A description of the atmospheric dispersion models used by the applicant to calculate concentrations in air and amount of material deposited as a result of routine releases of radioactive gases to the atmosphere. The models should be sufficiently documented and substantiated to allow a review of their appropriateness to site, plant, and release characteristics. 2. A discussion of atmospheric diffusion parameters, such as vertical plume spread ( ) as a z function of distance and wind speed, related to measured meteorological parameters. Use of these parameters should be substantiated as to their appropriateness for use in 2.3.5-3 DRAFT Rev. 3 - April 1996 estimating the consequences of routine releases from the site boundary to