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IAEA0888 PSU-LEOPARD/RBI.

PSU-LEOPARD, Program LEOPARD in PFMP System, Fast Neutron and Thermal Neutron Spectra Calculation

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1. NAME OR DESIGNATION OF PROGRAM:  PSU-LEOPARD/RBI.
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2. COMPUTERS
To submit a request, click below on the link of the version you wish to order. Only liaison officers are authorised to submit online requests. Rules for requesters are available here.
Program name Package id Status Status date
PSU-LEOPARD/RBI IAEA0888/04 Tested 16-APR-1993
PSU-LEOPARD/RBI IAEA0888/05 Tested 23-MAR-1992

Machines used:

Package ID Orig. computer Test computer
IAEA0888/04 DEC VAX series DEC VAX 6000
IAEA0888/05 IBM PC PC-80386
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3. DESCRIPTION OF PROBLEM OR FUNCTION

LEOPARD is a unit cell code for generating two and/or four group constants for PWR fuel assemblies.  It assumes that the fuel assembly consists of a large array of identical unit cells, each unit cell being composed of a fuel pin and cladding, surrounded by a moderator. A non-lattice part of the fuel assembly is accounted for by introducing an "extra" region.
The most important feature of PSU-LEOPARD is the capability to fit the group constants as polynomials in burnup and soluble boron concentration, providing easily accessible data for in-core fuel management calculations. The polynomial coefficients are stored in a file called ADD (Assembly Data Description) in a format compatible with the MCRAC code.
RBI version 90.1 of PSU-LEOPARD (PC, IBM mainframe and VAX versions) includes a restart option, numerically more stable polynomial fit, PC and VAX timing routines, and a few other new options.
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4. METHOD OF SOLUTION

LEOPARD is a spectrum dependent non-spatial depletion code, based on the modified MUFT and SOFOCATE models. The  MUFT model, dividing the fast energy range into 54 energy groups, calculates the fast constants by utilizing the B1 and Grueling-Goertzel approximations. The SOFOCATE model, representing the thermal energy range by 172 energy levels, calculates the thermal constants averaged over the Wigner-Wilkins spectrum. ABH method is used to homogenize the unit cell for each energy level to  provide the equivalent homogeneous macroscopic cross sections for use with Wigner-Wilkins spectrum. The LEOPARD energy range is from zero eV to 10 MeV with a 0.625 eV cutoff between the fast and thermal groups.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

PSU-LEOPARD works with nuclides commonly used in water reactors. Thorium and U-238 chains are allowed.
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6. TYPICAL RUNNING TIME

Approximate running time per one depletion step (neutron spectrum calculation, few-group constants generation,  and depletion):
A) PC with 80x87 coprocessor
   96 seconds on 10 MHz PC-XT
   52 seconds on 12 MHz PC-AT
   19 seconds on 20 MHz PC-386
   14 seconds on 25 MHz PC-386/Cache
B) PC-386 with 80387 coprocessor
   12 seconds on 20 MHz PC-386
    8 seconds on 25 MHz PC-386/Cache
C) IBM mainframe
    6 seconds CPU on IBM-4341 (IBM VS FORTRAN)
D) VAX
   13 seconds CPU on VAX-11/750 (VAX-11 FORTRAN77)
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7. UNUSUAL FEATURES OF THE PROGRAM

Group constants are fitted by polynomials in burnup and in soluble boron concentration providing a complete set of data for automated core depletion.
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8. RELATED AND AUXILIARY PROGRAMS

Relation to previous version - The original IBM mainframe version of PSU-LEOPARD was developed by Prof. S.H. Levine of Penn State University and released earlier to NEA DB (Package-ID IAEA 0888/01). The RBI version offers:
- source in FORTRAN77 standard;
- version for PC, IBM mainframe, and VAX;
- binary library conversion program;
- several new options.
Auxiliary programs - DECTOBIN, and auxiliary program (included with  the package) for converting LEOPARD library from decimal to binary form; used to facilitate installation and/or transfer to different computers.
Related programs - MCRAC/RBI version 90.1.
PSU-LEOPARD/RBI and MCRAC/RBI (Multiple Cycle Reactor Analysis Code) form the computer code system PFMP/RBI (Penn State Fuel Management Package, RBI version). PSU-LEOPARD/RBI is used to prepare group constants for global core analysis code, MCRAC/RBI.
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9. STATUS
Package ID Status date Status
IAEA0888/04 16-APR-1993 Tested at NEADB
IAEA0888/05 23-MAR-1992 Tested at NEADB
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10. REFERENCES

- L.E. Strawbridge and R.F. Barry:
  Criticality Calculations for Uniform Water Moderated Lattices
  Nucl. Sci. Eng., 23, 58 (1965).
- S.H. Levine:
  In-Core Fuel Management
  Educational Module No. 5, Editor Dean Eckoff, Kansas State
  University (1980).
- D. Pevec:
  In CORE FUEL MANAGEMENT - PWR Constants Generation Using
  PSU-LEOPARD Code
  Lecture notes, Workshop on Reactor Physics Calculations for
  Applications in Nuclear Technology, ITCP Trieste (1990).
IAEA0888/04, included references:
- B.G. Petrovic and D. Pevec:
  PSU-LEOPARD/RBI Version 90.1 User's Guide
  RBI-LP-N-6/90 (1990).
- In-Core Fuel Management Programs for Nuclear Power Reactors
  IAEA-TECDOC-314  (October 1984)
IAEA0888/05, included references:
- B.G. Petrovic and D. Pevec:
  PSU-LEOPARD/RBI Version 90.1 User's Guide
  RBI-LP-N-6/90 (1990).
- In-Core Fuel Management Programs for Nuclear Power Reactors
  IAEA-TECDOC-314  (October 1984)
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11. MACHINE REQUIREMENTS

A) About 369 KB of available (free) RAM memory required;
   hard disk and mathematical coprocessor recommended.
B) About 360 KB of available of available (free) RAM memory and  mathematical coprocessor, NDP FORTRAN-386 and Phar Lap Tools    required;
   hard disk recommended.
C) About 400 KB of main memory.
D) About 400 KB of main memory.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
IAEA0888/04 FORTRAN-77
IAEA0888/05 FORTRAN-77
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

A) MS-DOS or PC-DOS on PC-XT/AT/386
B) MS-DOS or PC-DOS and Phar Lap Tools on PC-386
C) OS/VS, OS2/MVS, CMS, or similar on IBM mainframe
D) VMS on VAX
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

- On PC-386, version B is about 1.6 times faster than version A, but   requires NDP FORTRAN-386 compiler and Phar Lap Tools.
- Timing routines are provided through FORTRAN calls in PC and VAX  version. To avoid subroutines in assembly language, no timing is  provided in IBM mainframe version (CPU accounting automatically   done by OS).
- It is possible to recompile and run PSU-LEOPARD on a PC without   coprocessor, but the running time increases significantly.
- On some non-100% IBM-compatible PC-XTs, unexpected floating-point   exceptions may occur. This problem has not been noticed on PC-AT   and PC-386 compatibles.
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15. NAME AND ESTABLISHMENT OF AUTHOR

RBI Version 90.1 (A, B, C, and D)           B.G. Petrovic, T. Smuc, D. Pevec, and D. Grgic
          Ruder Boskovic Institute
          Bijenicka c. 54, P.O. Box 1016
          4100 Zagrab, Yugoslavia
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16. MATERIAL AVAILABLE
IAEA0888/04
File name File description Records
IAEA0888_04.001 Information file 58
IAEA0888_04.002 Command file to run DECTOBIN 9
IAEA0888_04.003 Library in decimal format 6347
IAEA0888_04.004 DECTOBIN source file 91
IAEA0888_04.005 DECTOBIN executable file 0
IAEA0888_04.006 Command file to run LEO 21
IAEA0888_04.007 Binary library 0
IAEA0888_04.008 Sample problem 1 input 12
IAEA0888_04.009 Sample problem 2 input 33
IAEA0888_04.010 LEO source file 3195
IAEA0888_04.011 LEO executable file 0
IAEA0888_04.012 Sample problem 1 output 318
IAEA0888_04.013 Sample problem 2 add deck 61
IAEA0888_04.014 Sample problem 2 output 2697
IAEA0888/05
File name File description Records
IAEA0888_05.001 Information file 67
IAEA0888_05.002 Batch file to compile and link DECTOBIN 1
IAEA0888_05.003 Batch file to compile and link LEO 1
IAEA0888_05.004 Batch file to run DECTOBIN 1
IAEA0888_05.005 Batch file to run Sample Problem 1 1
IAEA0888_05.006 Batch file to run Sample Problem 2 1
IAEA0888_05.007 Sample Problem 1 input 12
IAEA0888_05.008 Sample Problem 2 input 33
IAEA0888_05.009 DECTOBIN Source file 91
IAEA0888_05.010 LEO0 source file 110
IAEA0888_05.011 LEO1 source file 698
IAEA0888_05.012 LEO2 source file 387
IAEA0888_05.013 LEO3 source file 632
IAEA0888_05.014 LEO4 source file 716
IAEA0888_05.015 LEO5 source file 605
IAEA0888_05.016 DECTOBIN executable file 0
IAEA0888_05.017 LEO executable file 0
IAEA0888_05.018 LEO Binary Library 0
IAEA0888_05.019 LEO Decimal Library 6347
IAEA0888_05.020 Sample problem 2 punched output 61
IAEA0888_05.021 Sample problem 1 output 325
IAEA0888_05.022 Sample problem 2 output 2742
IAEA0888_05.023 DOS file-names 22
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17. CATEGORIES
  • B. Spectrum Calculations, Generation of Group Constants and Cell Problems
  • D. Depletion, Fuel Management, Cost Analysis, and Power Plant Economics

Keywords: cell calculation, cross sections, depletion, disadvantage factor, fuel management, group constants, neutron spectra.