1. NAME AND TITLE
FOURACES: Code System for Producing Spectrum Weighted, Group Averaged Cross Sections
from ENDF/B, KEDAK, or UK Libraries.
Comitato Nazionale per l'Energia Nucleare, Centro Studi E Richerche, Bologna, Italy.
3. CODING LANGUAGE AND COMPUTER
Fortran IV and Assembler; IBM 360/75, 370/168, 3033.
4. NATURE OF PROBLEM SOLVED
FOURACES produces spectrum weighted, group-averaged nuclear constants for reactor
5. METHOD OF SOLUTION
Data contained in the ENDF/B, KEDAK, or UK libraries is used as basic input. The weighting
function is arbitrary and can be specified by the user. Included in the code is a section devoted to the
generation of resonant, Doppler-broadened cross sections in the framework of single or multi-level
Breit-Wigner, Adler-Adler or Reich Moore formalisms.
6. RESTRICTIONS OR LIMITATIONS
FOURACES can treat up to 256 energy groups.
7. TYPICAL RUNNING TIME
a. Sample problems in referenced document:
CPU time on an IBM 360/75 operating under OS
38 sec for 26 groups, 12C and 235U, UKNDL
31 sec for 99 groups, ENDF/B, with Doppler broadening
2 min 43 sec for 26 groups, 235U, KEDAK.
b. Sample problem on tape:
CPU time on an IBM 3033 operating under MVS was 2 min 54 sec.
8. COMPUTER HARDWARE REQUIREMENTS
FOURACES is operable on IBM 360/75, 370/168 or 3033 computers. It requires 276 K to
compile on an IBM 3033.
9. COMPUTER SOFTWARE REQUIREMENTS
Fortran H and Assembler compilers are required. Access to ENDF/B, KEDAK or UKNDL data
files is required.
FOURACES '82--Summary sheet of modifications.
FOURACES '79--Summary sheets describing modifications.
G. C. Panini, "FOURACES--A Programme for Producing Group Averaged Cross Sections from
Different Files," RT/FI(73)16 (1973).
11. CONTENTS OF CODE PACKAGE
Included are the referenced documents and one (1.2MB) DOS diskette which contains the source
code, ENDF-B/IV data library, and sample problem input and output.
12. DATE OF ABSTRACT
KEYWORDS: CROSS SECTION PROCESSING; GAMMA-RAY CROSS SECTION PROCESSING; NEUTRON CROSS SECTION PROCESSING