1. NAME AND TITLE
SUPERDAN-PC: Calculates Dancoff Factor of Spheres, Cylinders and Slabs.
Science Applications International Inc., Oak Ridge, Tennessee.
3. CODING LANGUAGE AND COMPUTER
Fortran 77; IBM PC.
4. NATURE OF PROBLEM SOLVED
SUPERDAN-PC computes the Dancoff factor which is used to determine the flux reduction in
resonance integral calculations. This personal computer version was converted from the SCA-4/SUPERDAN IBM mainframe code package.
5. METHOD OF SOLUTION
The Dancoff factor is calculated using three types of geometry: infinitely long cylinders, spheres
and infinite slabs. The program for cylinders includes corrections for the effect of partial shadowing
of a rod by adjacent rods and for the effect of clad surrounding rods. The effect of clad is also
considered in the slab geometry. These corrections are not available for spheres.
6. RESTRICTIONS OR LIMITATIONS
7. TYPICAL RUNNING TIME
In the sample problem, the calculation of the Dancoff factor for infinite slabs took only a few
seconds; for the sphere, it took about 1 minute; and for the cylinder, it was about 3 minutes on an IBM
PC/XT with an 8087 math co-processor.
8. COMPUTER HARDWARE REQUIREMENTS
IBM PC and compatibles with or without a math co-processor.
9. COMPUTER SOFTWARE REQUIREMENTS
The code was written in Fortran 77 and was tested under PC-DOS (IBM PC). Executable files,
produced by the MICROSOFT's Fortran 77 compiler (version 4.01) and linker (version 3.64), are
J R Knight, "SUPERDAN: Computer Programs for Calculating the Dancoff Factor of Spheres,
Cylinders and Slabs," ORNL/NUREG/CSD/TM-2 (March 1978).
11. CONTENTS OF CODE PACKAGE
Included are the referenced document and one (360 K) diskette including source, executables, a
sample session, and an information file.
12. DATE OF ABSTRACT
KEYWORDS: MICROCOMPUTER; INTERACTIVE, ON-LINE; REACTOR PHYSICS; DANCOFF FACTORS