1. NAME AND TITLE

SUPERDAN-PC: Calculates Dancoff Factor of Spheres, Cylinders and Slabs.

2. CONTRIBUTOR

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

None noted.

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 included.

10. REFERENCE

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

June 1990.