1. NAME AND TITLE

SMART: Code System for Calculating Early Offsite Consequences from Nuclear Reactor Accidents.

2. CONTRIBUTOR

Brookhaven National Laboratory, Long Island, New York under sponsorship of the U.S. Nuclear Regulatory Commission.

3. CODING LANGUAGE AND COMPUTER

FORTRAN 77; IBM PC.

4. NATURE OF PROBLEM SOLVED

SMART calculates early offsite consequences from nuclear reactor accidents. Once the air and ground concentrations of the radionuclide are estimated, the early dose to an individual is calculated via three pathways: cloudshine, short-term groundshine, and inhalation.

5. METHOD OF SOLUTION

The model predicts time-integrated air concentration of each radionuclide at any location from release as a function of time-integrated source strength using the Gaussian profile or, optionally, as an average over the cross-section based on a top-hat distribution.

The solution procedure uses simplified meteorology and involves direct analytic integration of air concentration equations over time and position. Dispersion parameters are calculated from exponential fits to the Pasquill-Gifford curves for six atmospheric stability classes designated A to F.

6. RESTRICTIONS OR LIMITATIONS

None noted.

7. TYPICAL RUNNING TIME

SMART is an interactive code, and the sample problem runs in a few seconds.

8. COMPUTER HARDWARE REQUIREMENTS

SMART runs on IBM PC or compatible computers under DOS and VAX mainframe computers running VMS.

9. COMPUTER SOFTWARE REQUIREMENTS

The code was written in FORTRAN 77 and was tested at RSIC using the Microsoft Version 4.01 compiler. The IBM PROFORT compiler was used to create the executable file included in the package.

10. REFERENCE

I. K. Madni, E. G. Cazzoli and M. Khatib-Rahbar, "A Simplified Model for Calculating Early Offsite Consequences from Nuclear Reactor Accidents," NUREG/CR-5164, BNL-NUREG-52153 (July 1988).

11. CONTENTS OF CODE PACKAGE

Included are the referenced document and a 5.25 inch DS/HD (1.2 MB) diskette which includes source codes, data files, output and an executable file.

12. DATE OF ABSTRACT

May 1992.