Document: NUREG-0800
Document ID: 112961d5-bbf7-4ebc-8a51-ee8e2292ddbc
Document Type: srp
Title: LONG-TERM DIFFUSION ESTIMATES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340585.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.3.5
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Accident Evaluation Branch (AEB) Secondary - Effluent Treatment Systems Branch (ETSB) Radiological Assessment Branch (RAB) I. AREAS OF REVIEW Information is presented by the applicant and reviewed by the staff concerning atmo- spheric diffusion estimates for routine releases of effluents to the atmosphere. The review covers the following specific areas: 1. Atmospheric dispersion models to calculate concentrations in air and amount of material deposited as a result of routine releases of radioactive material to the atmosphere. 2. Meteorological data used as input to diffusion models. 3. Derivation of diffusion parameters. 4. Relative concentration (X/Q) and relative deposition (D/Q) values used for assessment of consequences of routine airborne radioactive releases. A secondary review is performed by ETSB and RAB and the results are used by AEB in the overall evaluation of the long-term diffusion estimates. The ETSB reviews the points of routine release of radioactive material to the atmosphere and the characteristics of each release mode. The RAB reviews the locations of potential receptors for dose computations. The results of their analyses are transmitted to AEB for use in its independent review. II. ACCEPTANCE CRITERIA Characterization of atmospheric transport and diffusion conditions is necessary for estimating the radiological consequences of routine releases of radioactive | Rev. 2 - July 1981 USNRC STANDARD REVIEW PLAN Standard review plans are prepared for the guidance of the Office of Nuclear Reactor Regulation staff responsible for the review of applications to construct and operate nuclear power plants. Thes docurments are made available to the public as part of the Commission s policy to Inform the nuclear Industry and the general public of regulatory procedures and policies. Standard review plans are not substitutes for regulatory guides or the Commission's regulations and compliance with them Is not required. The