NEA-0844 FISPET.

FISPET, MultiGroup Fission Spectra Calculation from ENDF/B

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROBLEM 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 AUTHOR, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: FISPET.

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2. COMPUTERS

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Program name	Package id	Status	Status date
FISPET	NEA-0844/01	Arrived	14-NOV-2001

Machines used:

Package ID	Orig. computer	Test computer
NEA-0844/01	IBM 370/168

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3. DESCRIPTION OF PROBLEM OR FUNCTION

FISPET calculates a group- integrated fission spectrum from an ENDF/B data file.

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4. METHOD OF SOLUTION

It is assumed that the fission spectrum can be described by a combination of Maxwellian, evaporation, and/or Watt spectra, as specified by the ENDF/B data. The integrals are perfor- med using the Simpson adaptive routine described in reference (1).

Group-integrated spectra are calculated for a given set of materials and nuclear temperatures, and are output in FOURACES or ANISN for- mat.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The present version of FISPET requires that 13x(number of energy groups)+(number of materials)+(number of temperatures) does not exceed 2175. However, this restriction can be relaxed by increasing the size of an array declared in the main program.

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6. TYPICAL RUNNING TIME

FISPET requires 0.6 seconds of IBM 370/168 CP time to calculate a 25-group fission cross section for one material at one temperature.

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7. UNUSUAL FEATURES OF THE PROGRAM:

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8. RELATED AND AUXILIARY PROGRAMS

FISPET is an ancillary program of FOURACES, which calculates group-averaged cross sections.

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9. STATUS

Package ID	Status date	Status
NEA-0844/01	14-NOV-2001	Masterfiled Arrived

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10. REFERENCES

- W.M. McKeeman:
Simpson Adaptive Integration Routine.
Comm. of ACM 5, 12 (1962).

NEA-0844/01, included references:

- G.C. Panini:
FISPET - A Code for Computing Fission Spectra from ENDF/B.
CNEN-RT/FI(81)21 (August 1981)

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11. MACHINE REQUIREMENTS

Most cases require less than 120 kbytes of storage on an IBM 370/168.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NEA-0844/01	FORTRAN-IV

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED: Standard.

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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15. NAME AND ESTABLISHMENT OF AUTHOR

          G.C. Panini
          CNEN
          Via Mazzini 2
          Bologna
          Italy

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16. MATERIAL AVAILABLE

NEA-0844/01

test-case data   mag tapeJCL                                        DATTP
source program   mag tapeSource program                             SRCTP
test-case data   mag tapeSample Input                               DATTP
symb data lib    mag tapeInput Library (U-235, MAT 1261,ENDF/B-4)   LBSTP
test-case output mag tapeSample Card Image Output                   OUTTP
test-case output mag tapeSample Output                              OUTTP
report                   CNEN-RT/FI(81)21  (August 1981).           REPPT

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17. CATEGORIES

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

Keywords: ENDF/B, fission spectra, group constants.