1. NAME AND TITLE

REACTION: Code System to Calculate Integral Parameters with Reaction Rates from WIMS Output.

2. CONTRIBUTOR

Centro Atomico Bariloche, Comision Nacional de Energia Atomica, Argentina.

3. CODING LANGUAGE AND COMPUTER

FORTRAN 77; IBM PC's and compatibles (P00347/IBMPC/00); Macintosh 680X0 (P00347/AL000/00).

4. NATURE OF PROBLEM SOLVED

REACTION calculates different integral parameters related to neutron reactions on reactor lattices, from reaction rates calculated with WIMSD4 code, and comparisons with experimental values.

5. METHOD OF SOLUTION

REACTION extracts the absorption and fission rates from the WIMS output file and uses them for calculating the different integral parameters.

6. RESTRICTIONS OR LIMITATIONS

The number of groups of the reaction rates input (output of WIMS calculation) must be two, with a cut on energy at 0.625 eV. The following lattices are implemented to date: TRX-1, TRX-2, BAPL-1, BAPL-2, BAPL-3, BNL-1, BNL-2, BNL-3, R1/100H, R2/100H, R3/100H, ZEEP-1, ZEEP-2, and ZEEP-3.

7. TYPICAL RUNNING TIME

Program completion time with the included sample files was less than one second on a Northgate 486/66.

8. COMPUTER HARDWARE REQUIREMENTS

REACTION was developed on IBM PC's. It runs on either an IBM PC or compatible (math coprocessor recommended) or an Apple Macintosh 680x0 (FPU recommended).

9. COMPUTER SOFTWARE REQUIREMENTS

REACTION was tested at RSIC using the included sample input files on a Northgate 486/66 running MS-DOS 6.2 using MS FORTRAN v5.0 and the MS Linker for the PC version. The Apple version, RSIC used the included sample input files on a Power Macintosh 8100/80 running System 7.1.2 using Absoft's MacFortran II v3.3.

10. REFERENCES

a: Included in documentation:

F. Leszczynski, "Program REACTION," CAB Internal Report (1993).

b: background information:

M. H. Halsall, "A Summary of WIMS-D4 Input Options," AEEW m 1327 (1980).

11. CONTENTS OF CODE PACKAGE

The referenced documents and 1 DS/HD diskette are included written in either DOS or Macintosh format. The diskette contains the REACTION executable, the FORTRAN source file, and sample input and output.

12. DATE OF ABSTRACT

October 1994.

KEYWORDS: DATA PROCESSING, UTILITY; MICROCOMPUTER