RSIC COMPUTER CODE PSR-065

1. NAME AND TITLE

APSAI: Activity Calculations and Plotting of Neutron or Gamma-Ray Spectra Generated by Discrete Ordinates Code System ANISN.

AUXILIARY ROUTINE

INTRIGUE-II-C: Logarithmic and Semilogarithmic Calcomp Plot Routines.

2. CONTRIBUTORS

Karadeniz Technical University, Trabzon, Turkey.

Oak Ridge National Laboratory, Oak Ridge, Tennessee.

3. CODING LANGUAGE AND COMPUTER

Fortran IV; IBM 360/370.

4. NATURE OF PROBLEM SOLVED

APSAI plots energy or geometry dependent neutron fluxes and absorption densities which were obtained from one or more previous ANISN calculations. It permits the plotting, on one graph, output from up to 9 different ANISN runs having the same energy groups, mesh spacing, and geometrical size. Several geometry- or energy-dependent fluxes can also be plotted on the same figure. APSAI also calculates the damage flux and activities at the outer boundary.

5. METHOD OF SOLUTION

APSAI reads those fluxes which the user desires to be plotted on the same graph. These may come from as many as 9 magnetic tapes from different ANISN calculations. APSAI allows, in the same run, drawing selected fluxes as functions of energy (on a logarithmic-logarithmic graph) or spatial dimension (x-coordinate, on a semilogarithmic graph) and absorption densities (on a semilogarithmic graph).

APSAI does the plotting using the PSR-54/INTRIGUE-II-C plot routines.

6. RESTRICTIONS OR LIMITATIONS

All cases must have the same energy and spatial structure; the geometrical form (plane, cylinder, sphere) need not be the same. Because of fixed dimensioning, the number of energy groups must be < 100 and the number of mesh intervals < 150. The graph paper size is 10" x 14"; maximum number of different ANISN cases is 9; maximum number of curves on each graph is 16; maximum number of calculated activities of the outer boundary is 5.

7. TYPICAL RUNNING TIME

For 100 energy groups, 150 mesh points, 6 geometry, 6 energy-dependent curves, and 5 activities from 2 ANISN cases on the IBM 360/91 computer, the CPU time was 18 seconds.

8. COMPUTER HARDWARE REQUIREMENTS

APSAI is operable on the IBM 360/370 computers. It requires approximately 204 K bytes of directly addressable core memory.

9. COMPUTER SOFTWARE REQUIREMENTS

A Fortran IV compiler is required.

10. REFERENCE

S. Sahin, "APSAI: A Computer Code for Plotting Fluxes and Absorption Densities Generated by the ANISN Code," ORNL-TM-4273 (July 1973).

11. CONTENTS OF CODE PACKAGE

Included are the referenced document and one (1.2MB) DOS diskette which contains the source code and sample problem input and output.

12. DATE OF ABSTRACT

January 1973; revised and updated February 1984.