1. NAME AND TITLE
FITOCO: Converter of Fine-Group Flux Density and Cross Section Data to Coarse Group Values.
Netherlands Energy Research Foundation ECN, Petten, The Netherlands.
3. CODING LANGUAGE AND COMPUTER
Fortran IV EXTENDED; CDC-CYBER 175.
4. NATURE OF PROBLEM SOLVED
FITOCO converts neutron spectrum data and group cross section data from a fine-group structure into a coarser group structure. This is often used in neutron activation spectrometry when unfolding procedures are applied.
The effective coarse group cross section values for a cross section of a material inside a detector
cover (i.e., 10B or Cd) can also be calculated.
5. METHOD OF SOLUTION
FITOCO requires as input a representation of the weighting spectrum and a neutron cross section
library, both in the fine group structure of the CCC-112/SAND-II type. The output group structure
is determined by the program's input cards.
6. RESTRICTIONS OR LIMITATIONS
The execution of FITOCO requires a binary cross section library. This binary library is created
by another code system, e.g., PSR-188/ENTOSAN which is used for ENDF/B libraries or CSTAPE
which is part of CCC-112/SAND-II.
7. TYPICAL RUNNING TIME
A sample problem with 36 reactions required 3.3 sec on a CDC CYBER 175 computer.
8. COMPUTER HARDWARE REQUIREMENTS
FITOCO is operable on a CDC CYBER 175 computer using a NOS/BE operating system.
9. COMPUTER SOFTWARE REQUIREMENTS
A Fortran IV EXTENDED compiler and access to a binary fine group library are required.
H. Ch. Rieffe, "FITOCO--A Program for the Conversion of Fine Group Flux Density and Cross
Section Data to Coarse Group Values," ECN-92 (April 1981).
11. CONTENTS OF CODE PACKAGE
Included are the referenced document and one (1.2MB) DOS diskette which contains the source
code, input spectrum, plus sample problem input and output.
12. DATE OF ABSTRACT
July 1982; revised October 1983; reviewed May 1984.
KEYWORDS: MULTIGROUP CROSS SECTION PROCESSING; NEUTRON CROSS SECTION PROCESSING