CCC-0343 LEOPARD-MICRO.

LEOPARD-MICRO, Spectrum-Dependent Non-Spatial Fuel Depletion

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: LEOPARD-MICRO.

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2. COMPUTERS

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Program name	Package id	Status	Status date
LEOPARD-MICRO	CCC-0343/01	Tested	02-AUG-1990

Machines used:

Package ID	Orig. computer	Test computer
CCC-0343/01	IBM PC	IBM PC

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3. DESCRIPTION OF PROGRAM OR FUNCTION

LEOPARD determines fast and thermal spectra, using only basic geometry and temperature data, based on a modified MUFT-SOFOCATE model. The code optionally computes fuel depletion effects for a dimensionless reactor and recomputes the spectra before each discrete burnup step.
LEOPARD will automate the spectra calculations defined by Strawbridge in WCAP-3269-25 and will account for the variation of neutron spectra with fuel depletion. The latter task is achieved by performing the spectra calculations, calculating fuel depletion for a given time increment, recalculating spectra, etc. The burnup calculations are non-spatial.

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4. METHOD OF SOLUTION

The user supplies the reactor geometry, compositions and temperatures. The code temperature corrects the input data and computes number densities and three epithermal cross sections (for the fuel pellet, the clad and moderator, and the homogenized cell) to be used in the spectrum calculations.
LEOPARD assumes that every reactor contains a large array of unit fuel cells arranged in either a square lattice or a hexagonal lattice. Each unit cell contains one cylindrical fuel rod, a metallic clad around the fuel rod, and a moderator. In a real reactor this geometry is adequate within a large fuel bundle, but commonly several percent of the core is taken up by control rod followers, water slots, assembly cans, structure, etc. LEOPARD accounts for this by allowing a fictitious region to be defined and described in a manner entirely analogous to the description of the "real" regions within the unit fuel cell. Spectrum calculations are then done on an "equivalent" unit cell.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM: None noted.

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6. TYPICAL RUNNING TIME

The sample input problem LEOIN took 2 minutes on the IBM PC/XT; the sample burnup problem PS7 took about 20 minutes.

CCC-0343/01

NEA-DB compiled the program and ran the test cases included in this package on an IBM PC/at personal computer and for comparison reasons also on a DEC VAX 8810. Results obtained on both machines were consistent with each other. On the PC: the program compiled (with MS FORTRAN 5.0) in 10m33s, and executed in 59s (case 1) and 11m5s (case 2).

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7. UNUSUAL FEATURES OF THE PROGRAM:

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8. RELATED AND AUXILIARY PROGRAMS: LEOPARD (NESC0279).

CCC-0343/01

SPS SPOTS4 source routine
SGDL SPOTS4 Group Data Library

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9. STATUS

Package ID	Status date	Status
CCC-0343/01	02-AUG-1990	Tested at NEADB

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10. REFERENCES:

CCC-0343/01, included references:

- B.R. Leonard, Jr. et al.:
  Cross-Section Standardization for Thermal Power Reactors
  EPRI 221 (July 1975).
- R.F. Barry:
  LEOPARD - A Spectrum Dependent Non-Spatial Depletion Code for the
  IBM-7094
  WCAP-3269-26 (September 1963).
- Jung-Do Kim and Jong Tai Lee:
  SPOTS4 - Group Data Library and Computer Code Preparing ENDF/B-4
  Data for Input to LEOPARD
  IAEA-NDS-36 Rev. 0 (September 1981).
- Jung-Do Kim and Jong Tai Lee:
  Benchmark Test and Adjustment of an Updated Library from ENDF/B-IV
  (A draft of a paper submitted for publication in Journal of Korean
  Nuclear Society) (May 1981).

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11. MACHINE REQUIREMENTS: The code is operable on IBM PC.

CCC-0343/01

IBM PC/AT or compatible. The program executes in 196K of RAM.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
CCC-0343/01	FORTRAN-77

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

A FORTRAN IV compiler is required. The IBM PC version uses the Microsoft FORTRAN Version 4.1 compiler and can be compiled with or without a math coprocessor. The executable file distributed by RSIC does not require the coprocessor.

CCC-0343/01

MS-DOS 3.20 with compiler Microsoft FORTRAN VERSION 5.0

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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15. NAME AND ESTABLISHMENT OF AUTHORS

Contributed by: Radiation Safety Information Computational Center
                Oak Ridge National Laboratory
                Oak Ridge, Tennessee, U. S. A.

Developed by:
              Electric Power Research Institute
              Palo Alto, California

              Westinghouse Electric Corporation
              Pittsburgh, Pennsylvania

              Battelle Pacific Northwest Laboratories
              Richland, Washington

              Korea Advanced Energy Research Institute
              through the:
              Nuclear Data Services of the
              International Atomic Energy Agency
              Vienna, Austria

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16. MATERIAL AVAILABLE

CCC-0343/01

File name	File description	Records
CCC0343_01.001	Information file	142
CCC0343_01.002	ACCUM.FOR Source file for PC and VAX	204
CCC0343_01.003	BURN.FOR Source file for PC and VAX	196
CCC0343_01.004	FUNCT.FOR Source file for PC and VAX	78
CCC0343_01.005	INGR.FOR Source file for PC and VAX	276
CCC0343_01.006	INPUT.FOR Source file for PC	258
CCC0343_01.007	MAIN.FOR Source file for PC	142
CCC0343_01.008	MASSED.FOR Source file for PC and VAX	226
CCC0343_01.009	MUFT.FOR Source file for PC	177
CCC0343_01.010	OUTPUT.FOR Source file for PC and VAX	250
CCC0343_01.011	RESINT.FOR Source file for PC and VAX	107
CCC0343_01.012	SLOW.FOR Source file for PC and VAX	148
CCC0343_01.013	THRMAL.FOR Source file for PC	122
CCC0343_01.014	WORKS.FOR Source file for PC and VAX	272
CCC0343_01.015	LEOLIB Binary library for MS Fortran	1009
CCC0343_01.016	LEO.EXE Executable file	1599
CCC0343_01.017	LEOIN Sample input for case-1	13
CCC0343_01.018	PS7 Sample input for case-2	26
CCC0343_01.019	TEST1DB.OUT Sample output for case-1	337
CCC0343_01.020	TEST2DB.OUT Sample output for case-2	4304
CCC0343_01.021	COMPILE.BAT Batch file for comp&link (MS)	3
CCC0343_01.022	RUN.BAT Batch file for execution (MS)	3
CCC0343_01.023	INPUTVX.FOR Source file for VAX	270
CCC0343_01.024	MAINVX.FOR Source file for VAX	145
CCC0343_01.025	MUFTVX.FOR Source file for VAX	183
CCC0343_01.026	THRMALVX.FOR Source file for VAX	130
CCC0343_01.027	LEOLIB.COD Formatted library	7970
CCC0343_01.028	LEOLIB.BIN Binary library for VAX	67
CCC0343_01.029	READLIB.FOR Source file for reading binary	74
CCC0343_01.030	WRITELIB.FOR Source file for writing binary	77
CCC0343_01.031	CL.COM Command file for comp&link(VAX)	3
CCC0343_01.032	RUN.COM Command file for execution(VAX)	3
CCC0343_01.033	DOS file-names	32

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17. CATEGORIES

D. Depletion, Fuel Management, Cost Analysis, and Power Plant Economics

Keywords: burnup, depletion, spectra.