last modified: 27-APR-1983 | catalog | categories | new | search |

CCC-0180 TDA.

TDA, Time-Dependent 1-D Neutron Transport, Gamma Transport by ANISN Method in Slab, Spherical, Cylindrical Geometry

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1. NAME OR DESIGNATION OF PROGRAM:  TDA.
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2. COMPUTERS
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Program name Package id Status Status date
TDA CCC-0180/04 Tested 27-APR-1983

Machines used:

Package ID Orig. computer Test computer
CCC-0180/04 IBM 370/168 IBM 370/168
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3. NATURE OF PHYSICAL PROBLEM SOLVED

TDA (Time-Dependent ANISN) solves the one-dimensional time- dependent Boltzmann transport equation for neutrons and/or gamma- rays in slab, sphere or cylindrical geometries. Delayed neutron and  other time-dependent effects are not considered in the present version.
A choice of two types of sources and one initial condition specification is given (A. Space and energy distributed source with  a step function time distribution. B. Analytical first collision source).
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4. METHOD OF SOLUTION

TDA is based on the steady-state SN code ANISN for reasons of stability and generality. The weighted difference equations are used.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:  Limited only by available main storage.
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6. TYPICAL RUNNING TIME

The sample problem (S8, P1, 16 neutron and 10  gamma groups, 20 mesh points, precision = 1.0E-05) took 10 seconds per time step on IBM 370/165.
CCC-0180/04
NEA-DB ran the test case on IBM 370/168 in 4 minutes.
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7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM
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8. RELATED OR AUXILIARY PROGRAMS: RELATED AND AUXILIARY PROGRAMS
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9. STATUS
Package ID Status date Status
CCC-0180/04 27-APR-1983 Tested at NEADB
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10. REFERENCES

- W. W. Engle:
  Informal Description of the IBM 360 version of TDA
  ORNL (1973).
- R. Douglas O'Dell and Raymond E. Alcouffe:
Transport Calculations for Nuclear Analyses: Theory and Guidelines for Effective Use of Transport Codes
  LA-10983-MS and UC-32 (September 1987).
CCC-0180/04, included references:
- S.A. Dupree et al.:
  Time Dependent Neutron and Photon Transport Calculations Using the
  Method of Discrete Ordinates.
  LA-4557,(ORNL-4662)(SAI-70-125)(May 1971).
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11. MACHINE REQUIREMENTS

Maximum 5 external disk or tape files plus reader and printer. User should supply clock routine.
CCC-0180/04
Main storage requirement for test case is 300 kbytes.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
CCC-0180/04 FORTRAN-IV
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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED:  IBM
360/370 with FORTRAN-H compiler.
CCC-0180/04
The test case was executed under OS370/081 using the              FORTRAN-H-EXTENDED compiler.
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14. ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

Time limit after which the TDA run is stopped and fluxes are saved on disk or tape can be specified on the header card.
Only FFREAD (free field read) input subroutine is machine- dependent.
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15. NAME AND ESTABLISHMENT OF AUTHOR

         Oak Ridge National Laboratory
         Oak Ridge, Tennessee, U. S. A.
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16. MATERIAL AVAILABLE
CCC-0180/04
File name File description Records
CCC0180_04.003 TDA INFORMATION FILE 40
CCC0180_04.004 TDA SOURCE PROGRAM (FORTRAN-4) 2555
CCC0180_04.005 TDA JCL 20
CCC0180_04.006 TDA INPUT FOR TEST CASE 136
CCC0180_04.007 TDA OUTPUT OF TEST CASE 4058
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17. CATEGORIES
  • F. Space - Time Kinetics, Coupled Neutronics - Hydrodynamics - Thermodynamics

Keywords: cylinders, diffusion, discrete ordinate method, gamma radiation, neutron transport theory, one-dimensional, slabs, spheres, time dependence.