1. NAME AND TITLE

KAP-VI: Kernel Integration Code System in Complex Geometry.

DATA LIBRARY

W-M-NRSM: Multigroup Neutron and Gamma-Ray Cross Sections (packaged separately as DLC-26/W-M-NRSM).

KAP-VI is part of a series of code systems for shield design called ``Synthesis of Calculational Methods for the Design and Analysis of Radiation Shields for Nuclear Rocket Systems.'' This methodology is packaged by RSIC as CCC-94 through CCC-98. The computing technology in CCC-94, CCC-95, and CCC-96 are termed by the originators the ``early'' design method.

2. CONTRIBUTORS

Westinghouse Astronuclear Laboratory, Pittsburgh, Pennsylvania.

NASA George C. Marshall Space Flight Center, Huntsville, Alabama.

3. CODING LANGUAGE AND COMPUTER

FORTRAN IV; UNIVAC 1108.

4. NATURE OF PROBLEM SOLVED

Neutron and/or gamma radiation levels are calculated at detector points located within or outside a complex radiation source geometry describable by a combination of quadratic surfaces. A variety of options are available for describing cylindrical, spherical, disc, line, or point sources or source distributions in complex geometries. The output can be flux, dose, or heating rate.

5. METHOD OF SOLUTION

The point kernel method is used. The attenuation function, or kernel, for gamma rays employs exponential attenuation with a buildup factor. Three optional fast neutron attenuation functions are included: 1) a modified Albert-Welton function for calculating fast neutron dose rate using removal cross sections, 2) a bivariant polynomial expression for computing neutron spectra using infinite media moments data, and 3) a monovariant polynomial expression for computing neutron spectra using infinite media moments data.

6. RESTRICTIONS OR LIMITATIONS

The following limitations are noted:

maximum number of boundary surfaces: 100

maximum number of geometric regions or zones: 100

maximum number of sets of response functions: 10

7. TYPICAL RUNNING TIME

Estimated running time of the sample problems: 3 minutes.

8. COMPUTER HARDWARE REQUIREMENTS

KAP was originally designed for a 32 K IBM 7090 or 7094 and later converted to run on CDC and UNIVAC computers. The packaged KAP VI is operable on the UNIVAC 1108.

9. COMPUTER SOFTWARE REQUIREMENTS

KAP VI may be implemented on a FORTRAN IV compiler.

10. REFERENCES

RSIC Data Package DLC-26 available for use in CCC-94/KAP-VI.

R. K. Disney and S. L. Zeigler, Nuclear Rocket Shielding Methods, Modification, Updating, and Input Data Preparation, Vol. 6: Point Kernel Techniques, WANL-PR- (LL)-034 (August 1970).

M. A. Capo and R. K. Disney, Implementation of Radiation Shielding Calculation Methods, Vol. 2: Seminar/Workshop Notes, WANL-PR(LL)-040 (December 1971).

11. CONTENTS OF CODE PACKAGE

Included are the referenced documents and a reel of magnetic tape which contains the source code and sample problem input in BCD/EBCDIC card images; total records 5538. Output from running sample problems is printed in the documentation.

12. DATE OF ABSTRACT

May 1969; revised December 1984, October 1991.

KEYWORDS: KERNEL; NEUTRON; GAMMA-RAY; COMPLEX GEOMETRY; SINGLE SCATTERING