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:
nce criteria given in subsection II. SRP Section 14.3 (proposed) contains procedures for the review of certified design material (CDM) for the standard design, including the site parameters, interface criteria, and ITAAC.30 IV. EVALUATION FINDINGS The reviewer verifies that appropriate atmospheric dispersion models, with adequate onsite meteorological data as input to the models, have been used to calculate relative concentration and relative deposition at appropriate distances and directions from postulated release points during routine airborne releases of radioactive gases. The input to the Safety Evaluation 31 Report will also include a summary of the relative concentration (X/Q) and relative deposition (D/Q) calculated by the staff, reference to diffusion models used, and a comparison between the values computed by the staff and the applicant. For a CP, OL, COL, or early site permit, the 32 The reviewer's evaluation must support the following type of concluding statement, to be 33 included in the staff's safety evaluation report (SER):34 Based on the meteorological data provided by the applicant and an atmospheric dispersion model that is appropriate for the characteristics of the site and release points, the staff concludes that representative atmospheric transport and diffusion conditions have been calculated for the locations of potential receptors. The characterization of atmospheric transport and diffusion conditions satisfies the criteria described in Regulatory Guide 1.111 and are appropriate for the evaluation to demonstrate compliance with the numerical guides for doses contained in 10 CFR Part 50, Appendix I. For an application referencing a certified plant design, the reviewer's evaluation must also support a concluding statement similar to the following: Measured meteorological parameters for the proposed site are consistent with those identified in the envelope of site-related meteorological parameters provided in standard plant design documents.35