CCC-0180 TDA.

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

NAME OR DESIGNATION OF PROGRAM, COMPUTER, NATURE OF PHYSICAL PROBLEM SOLVED, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, FEATURES, AUXILIARIES, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED, ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: TDA.

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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
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.