last modified: 16-APR-1993 | catalog | categories | new | search |

CCC-0126 ASOP.

ASOP, Shield Calculation, 1-D, Discrete Ordinates Transport

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1. NAME OR DESIGNATION OF PROGRAM:  ASOP.
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2. COMPUTERS
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Program name Package id Status Status date
ASOP CCC-0126/02 Tested 16-APR-1993

Machines used:

Package ID Orig. computer Test computer
CCC-0126/02 IBM 3033 IBM 3090
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3. NATURE OF PHYSICAL PROBLEM SOLVED

ASOP is a shield optimization calculational system based on the one-dimensional discrete ordinates transport program ANISN. It has been used to design optimum shields for space applications of SNAP zirconium-hydride-uranium- fueled reactors and uranium-oxide fueled thermionic reactors and to  design beam stops for the ORELA facility.
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4. METHOD OF SOLUTION

ASOP generates coefficients of linear equations describing the logarithm of the dose and dose-weight derivatives as  functions of position from data obtained in an automated sequence of ANISN calculations. With the dose constrained to a design value and  all dose-weight derivatives required to be equal, the linear equations may be solved for a new set of shield dimensions. Since changes in the shield dimensions may cause the linear functions to change, the entire procedure is repeated until convergence is obtained.
The detailed calculations of the radiation transport through shield  configurations for every step in the procedure distinguish ASOP from other shield optimization computer code systems which rely on multiple component sources and attenuation coefficients to describe  the transport.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:  Problem size is limited only by machine size.
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6. TYPICAL RUNNING TIME

The sample case is executed on the IBM 3033 in about 8 CPU minutes.
CCC-0126/02
NEA-DB executed the test case included in this package  on an IBM 3090 computer in 3 minutes 36 seconds of CPU time.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS

ANISN: The CCC-254A/ANISN-ORNL source file is included in this package.
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9. STATUS
Package ID Status date Status
CCC-0126/02 16-APR-1993 Tested at NEADB
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10. REFERENCES:
CCC-0126/02, included references:
- Ward W. Engle, JR.:
  A User's Manual for ASOP, ANISN Shield Optimization Program
  CTC-INF-941 (September 1969)
- L.M. Petrie:
  Informal Notes on ITIME Assembler Routine
  (May 3, 1973)
- ANISN Update
  Modifications Included in the July 1988
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11. MACHINE REQUIREMENTS:  The code runs on the IBM 3033.
CCC-0126/02
To run the test case on an IBM 3090 computer, 3624K bytes of main storage were required.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
CCC-0126/02 FORTRAN+ASSEMBLER
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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED

The
IBM VS FORTRAN compiler with the option 'LANGLVL(66)' was used to execute the sample case. An IBM assembler is required for the ITIME  and ALOCAT routines.
CCC-0126/02
MVS/XA (IBM 3090).
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14. ANY 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, U. S. A.
Developed by:   Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
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16. MATERIAL AVAILABLE
CCC-0126/02
File name File description Records
CCC0126_02.001 This information file 47
CCC0126_02.002 JCL and control information (NEADB) 166
CCC0126_02.003 JCL (author) 72
CCC0126_02.004 ASOP FORTRAN IV source program 1031
CCC0126_02.005 ANISN FORTRAN IV source program 3944
CCC0126_02.006 LOC,ITIME,ALOCAT assembler source subrout. 158
CCC0126_02.007 Sample problem input data 1854
CCC0126_02.008 Sample problem output 6674
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17. CATEGORIES
  • J. Gamma Heating and Shield Design

Keywords: design, discrete ordinate method, doses, one-dimensional, optimization, shields.