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:
REVIEW RESPONSIBILITIES Primary - Accident Evaluation Branch (AEB)Emergency Preparedness and Radiation Protection Branch (PERB)1 Secondary - Effluent Treatment Systems Branch (ETSB) Radiological Assessment Branch (RAB) None2 I. AREAS OF REVIEW Information for a construction permit (CP), operating license (OL), combined license (COL), or early site permit review is presented by the applicant and reviewed by the staff concerning 3 atmospheric 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. 5. Points of routine release of radioactive material to the atmosphere, the characteristics of each release mode, and the location of potential receptors for dose computations.4 DRAFT Rev. 3 - April 1996 2.3.5-2 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.5 For a design certification review, values of X/Q should be in the site parameter envelope specified for the standardized design.6 Review Interfaces7 The 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.