1. NAME AND TITLE

DANCOFF-3: Calculates Dancoff Correction.

2. CONTRIBUTOR

Allgemeine Elektricitats-Gesellschaft, Frankfurt, Germany, through the NEA DB.

3. CODING LANGUAGE AND COMPUTER

Fortran IV; VAX

4. NATURE OF PROBLEM SOLVED

DANCOFF-3 calculates the Dancoff correction for cylindrical fuel rods in square and hexagonal infinite lattices, for fuel element rods near water gaps, and for fuel rod clusters.

5. METHOD OF SOLUTION

Evaluation is done by direct numerical integration over the moderator region.

6. RESTRICTIONS OR LIMITATIONS

None noted.

7. TYPICAL RUNNING TIME

Seconds to minutes, depending on complexity of lattice and number of Dancoff corrections calculated. NEA-DB ran the test case included in this package on a VAX 8810 computer in about 2 seconds of CPU time.

8. COMPUTER HARDWARE REQUIREMENTS

Developed on IBM 7040 and converted to run on VAX at NEA DB. 320 K bytes of VAX 8810 main storage.

9. COMPUTER SOFTWARE REQUIREMENTS

Fortran compiler under VMS 5.0.

10. REFERENCE

A. Sauer, "How to Use the Code Dancoff III," Allgemeine Elektricitats-Gesellschaft (July 1966).

11. CONTENTS OF CODE PACKAGE

Included are the referenced document and one (1.2MB) DOS diskette which include an information file, sources, executables, data, and sample problem input.

12. DATE OF ABSTRACT

April 1990.