NEA-0894 FITOCO.

FITOCO, Fine Group to Coarse Group Neutron Flux Conversion for Spectra Unfolding

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: FITOCO.

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2. COMPUTERS

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Program name	Package id	Status	Status date
FITOCO	NEA-0894/01	Tested	04-SEP-1992

Machines used:

Package ID	Orig. computer	Test computer
NEA-0894/01	CDC CYBER 175	IBM 3090

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3. DESCRIPTION OF PROGRAM OR FUNCTION

FITOCO converts neutron spectrum and group cross secton data from a fine group structure to a coarser group structure. The program uses a SAND-II type fine- group structure as input. The output from FITOCO can directly be applied as input for the spectrum unfolding code STAY'SL or similar codes. FITOCO can also calculate the effective coarse group cross values with detector cover materials, e.g. B-10 or Cd.

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4. METHOD OF SOLUTION:

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The lowest energy bound of the coarse group structure is fixed at 10**-10 MeV.

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6. TYPICAL RUNNING TIME

A run with about 36 reactions requires 3.3 CPU seconds on a CDC CYBER 170 computer.

NEA-0894/01

The program was compiled by NEA-DB on an IBM 3090 computer. The sample case was executed in 0.15 seconds of CPU time.

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7. UNUSUAL FEATURES OF THE PROGRAM:

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8. RELATED AND AUXILIARY PROGRAMS

SAND-II:input library generator; STAY'SL: unfolding code for output library processing.

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9. STATUS

Package ID	Status date	Status
NEA-0894/01	04-SEP-1992	Tested at NEADB

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10. REFERENCES:

NEA-0894/01, included references:

- 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)

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11. MACHINE REQUIREMENTS

For execution on a CDC CYBER 175 computer 25K words of main storage are required
NEA 0894/01: To run the test case included in this package on an IBM 3090 computer, 400KB of main storage were required.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NEA-0894/01	FORTRAN-IV

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:

NEA-0894/01

The program was implemented on an IBM 3090 running under MVS/XA. The source was compiled with the FORTRAN-V compiler.

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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15. NAME AND ESTABLISHMENT OF AUTHORS

    Henk Ch. Rieffe
    Netherlands Energy Research Foundation ECN
    1755 ZG Petten (NH), The Netherlands

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16. MATERIAL AVAILABLE

NEA-0894/01

File name	File description	Records
NEA0894_01.001	Information file	54
NEA0894_01.002	CSTAPE JCL	160
NEA0894_01.003	CSTAPE FORTRAN source program for libr. gen.	504
NEA0894_01.004	CSTAPE ASSEMBLER routine	65
NEA0894_01.005	CSTAPE input for library generation	2599
NEA0894_01.006	CSTAPE output for library generation	5839
NEA0894_01.007	FITOCO JCL	128
NEA0894_01.008	FITOCO FORTRAN source program	230
NEA0894_01.009	FITOCO sample prob. input unit 50	6
NEA0894_01.010	FITOCO sample prob. input unit 51	92
NEA0894_01.011	FITOCO sample prob. output unit 60	14
NEA0894_01.012	FITOCO sample prob. output unit 5	4
NEA0894_01.013	FITOCO sample prob. output unit 8	8

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17. CATEGORIES

B. Spectrum Calculations, Generation of Group Constants and Cell Problems

Keywords: activation analysis, group constants, neutron cross sections, neutron detectors, spectra unfolding.