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:
RELEASES REVIEW RESPONSIBILITIES Primary - Organization responsible for the review of meteorology Secondary - None I. AREAS OF REVIEW Chapter 2 of the SRP discusses the site characteristics that could affect the safe design and siting of the plant. The staff reviews information presented by the applicant for a construction permit (CP), operating license (OL), design certification (DC), early site permit (ESP), or combined license (COL) concerning conservative atmospheric dispersion factor (χ/Q value) estimates (1) at the exclusion area boundary (EAB), the outer boundary of the low population zone (LPZ), and at the control room for postulated design-basis accidental radioactive airborne releases and (2) at the control room from the onsite and/or offsite airborne releases of hazardous materials such as flammable vapor clouds, toxic chemicals, and smoke from fires. This SRP section applies to reviews performed for each of these types of applications. The review covers the following specific areas: 1. Atmospheric dispersion models to calculate atmospheric dispersion factors for postulated accidental radioactive and hazardous airborne releases. 2. Meteorological data and other assumptions used as input to atmospheric dispersion models. 3. Derivation of diffusion parameters (e.g., σy and σz). 2.3.4-2 Revision 3 - March 2007 4. Cumulative frequency distributions of χ/Q values. 5. Determination of conservative χ/Q values used to assess the consequences of (1) postulated design-basis atmospheric radioactive releases to the EAB, LPZ, and control room and (2) onsite and offsite hazardous material releases to the control room. 6. Additional Information for 10 CFR Part 52 Applications: Additional information will be presented dependent on the type of application. For a COL application, the additional information is dependent on whether the application references an ESP, a DC, both or neither. Information requirements are prescribed within the “Contents of Application”