1. NAME AND TITLE
RADOS: Gamma-Ray Dose Estimation from Cloud of Radioactive Gases by Kernel Integration.
Savannah River Laboratory, E. I. du Pont de Nemours and Company, Aiken, South Carolina.
3. CODING LANGUAGE AND COMPUTER
FORTRAN IV; IBM 360/65 and 360/75.
4. NATURE OF PROBLEM SOLVED
RADOS represents the finite spatial distribution of airborne source material as an infinite
number of line sources. The code provides a means of rapidly calculating whole body gamma-ray
dose from a finite cloud of radioactive material.
5. METHOD OF SOLUTION
The calculational method is based on the assumption that there is no change in the size and
shape of the radioactive cloud of unit thickness during the time the cloud will irradiate the receptor.
For an instantaneous release, the entire dose may be considered as being accumulated in unit time
from a cloud extending to infinity in both directions from the receptor. This assumption permits
the total dose to be calculated as the sum of the doses from an infinite number of line sources.
6. RESTRICTIONS OR LIMITATIONS
The following limitations must be considered:
a. The code permits dose calculations only on the axial center of the cloud path.
b. The receptor should be > 600 meters downwind from the release point.
c. The gamma-ray energy group structure is limited to the range 0.5 MeV to 2.0 MeV.
7. TYPICAL RUNNING TIME
The program required less than 2 seconds on the IBM 360/65 for a four energy group, 12 isotope, 1 distance problem.
Estimated running time on the IBM 360/75 for the packaged sample problem: 1 minute, 18
8. COMPUTER HARDWARE REQUIREMENTS
The code was designed for the IBM 360/65, using standard I-O.
9. COMPUTER SOFTWARE REQUIREMENTS
The code is operable on the IBM 360/75 Operating System using OS-360 Fortran H Compiler.
Errata DP-1098, "RADOS, A Code to Estimate Gamma Dose from a Cloud of Radioactive Gases."
R. E. Cooper, "RADOS, A Code to Estimate Gamma Dose from a Cloud of Radioactive Gases," DP-1098 (June 1967).
L. M. Arnett, "Calculation of Radiation Dose from a Cloud of Radioactive Gases," Nuclear
Applications, Vol. 3, p. 217-221 (April 1967).
11. CONTENTS OF CODE PACKAGE
Included are the referenced document and one (1.2MB) DOS diskette which contains the source
code and input and output for a sample problem.
12. DATE OF ABSTRACT
May 1969; updated July 1981, February 1985, October 1991.
KEYWORDS: KERNEL; GAMMA-RAY; AIRBORNE; REACTOR ACCIDENT