PSR-0156 PAPIN.

PAPIN, Cross Section, Self-Shielding Factors for Fertile Isotopes in Unresolved Resonance Region

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: PAPIN.

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2. COMPUTERS

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Program name	Package id	Status	Status date
PAPIN	PSR-0156/01	Tested	12-APR-2001

Machines used:

Package ID	Orig. computer	Test computer
PSR-0156/01	IBM 370 series	PC Pentium II 450,DEC ALPHA W.S.

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3. DESCRIPTION OF PROBLEM OR FUNCTION

PAPIN calculates cross section probability tables, Bondarenko self-shielding factors and average self-indication ratios for non-fissile isotopes, below the inelastic threshold, on the basis of the ENDF/B prescriptions for the un- resolved resonance region.

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4. METHOD OF SOLUTION

Monte-Carlo methods are utilized to generate ladders of resonance parameters in the unresolved resonance region, from average parameters and their appropriate distribution functions.
The neutron cross-sections are calculated by the single-level Breit-Wigner formalism, with s-, p-, and d-wave contributions. The cross section probability tables are constructed by sampling the Doppler-broadened cross sections.
The various self-shielded factors are computed numerically as Lebesgue integrals over the cross section probability tables.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:

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6. TYPICAL RUNNING TIME:

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7. UNUSUAL FEATURES OF THE PROGRAM:

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8. RELATED AND AUXILIARY PROGRAMS:

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9. STATUS

Package ID	Status date	Status
PSR-0156/01	12-APR-2001	Tested at NEADB

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10. REFERENCES:

PSR-0156/01, included references:

- J.G. Munoz-Cobos:
  PAPIN: A Fortran-IV Program to Calculate Cross Section Probability
  Tables, Bondarenko and Transmission Self-Shielding Factors for
  Fertile Isostopes in the Unresolved Resonance Region.
  ORNL/TM-7883 (ENDFB-310)  (August 1981)

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11. MACHINE REQUIREMENTS:

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
PSR-0156/01	FORTRAN-95

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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15. NAME AND ESTABLISHMENT OF AUTHOR

Contributed by: Radiation Safety Information Computational Center
                Oak Ridge National Laboratory
                Oak Ridge, Tennessee, USA
Developed by:   Oak Ridge National Laboratory
                Oak Ridge, Tennessee, USA

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16. MATERIAL AVAILABLE

PSR-0156/01

test-case data   mag tapeJCL and Input Data                         DATTP
source program   mag tape                                           SRCTP
test-case output mag tape                                           OUTTP
report                   ORNL/TM-7883 (ENDF-310)  (August 1981)     REPPT

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17. CATEGORIES

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

Keywords: Bondarenko scheme, Monte Carlo method, cross sections, neutron reactions, probability, resonance, self-shielding, transmission, unresolved region.