CCC-0256 TDT. (Abstract last modified 01-APR-1978)
1.
NAME OR DESIGNATION OF PROGRAM - TDT. Time Dependent TASK. 2.
COMPUTER FOR WHICH PROGRAM IS DESIGNED AND OTHER MACHINE VERSION PACKAGES AVAILABLE -
To request or retrieve programs click on the one of the active versions below.
A password and special authorization is required. Explanation of the status codes.
Machines used:
Package-ID Orig.Computer Test Computer
CCC-0256/01 IBM 370 series IBM 370 series
3.
DESCRIPTION OF PROBLEM OR FUNCTION - TDT solves the one-dimensional, time-dependent, multi-group form of the reactor kinetics equations, allowing an arbitrary number of delayed neutron groups. It can also solve standard static problems such as eigenvalue problems (trans- port only), distributed source problems and boundary source problems using either diffusion theory or transport theory. The time depend- ent solution is available only using transport theory. Vacuum and reflected boundary conditions are available.
4.
METHOD OF SOLUTION - The code employs a combination scattering and transfer matrix method to eliminate difficulties that arise in clas- sical finite difference techniques in the spatial domain. Within group (inner) iterations are eliminated and the solution convergence is independent of the spatial or time mesh. A predictor-corrector method is employed to obtain solutions in the temporal domain.
5.
RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM - A variable dimen- sioning technique is used to store data, and thus the only restric- tion is available space.
6.
TYPICAL RUNNING TIME - A 10 second rod drop transient problem using 7 regions, 5 groups and an S4 angular quadrature required 5 minutes CPU time on IBM 360/91. This time is significantly reduced by the point-kinetics option.
7.
UNUSUAL FEATURES OF THE PROGRAM - 8.
RELATED AND AUXILIARY PROGRAMS - TDT is an extension of TASK (2) (NESC-0558) to solve time-dependent problems.
9.
STATUS 10.
REFERENCES - 11.
MACHINE REQUIREMENTS - TDT requires 178k bytes of storage, plus data block storage, on an IBM 360/91. There is an option to output fluxes to a tape.
12.
PROGRAMMING LANGUAGE(S) USED - 13.
OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED - IBM/360 OS. 14.
OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS - 15.
NAME AND ESTABLISHMENT OF AUTHOR - 16.
MATERIAL AVAILABLE - 17.
CATEGORIES - Keywords: DIFFUSION EQUATIONS, ONE-DIMENSIONAL, REACTOR KINETICS, TIME DEPENDENCE, TRANSPORT THEORY
Program-name Package-ID Status
TDT CCC-0256/01 Tested
Convergence problems associated with highly multiplicative media are circomvented. Such problems are readily calculable.
All data are input using the FIDO format.
The time mesh can be supplied by the user, or calculated inter- nally. A point kinetics option is available to circomvent the dif- ficulties that arise in calculating the initial transient during rod drops.
CCC-0256/01: 01-APR-1978 Tested at NEADB
- E.T. Tomlinson, H.L. Dodds, R.A. Lillie, J.C. Robinson:
A User's Manual for TDT (Time-Dependent TASK)
ORNL-TM-4869 (June 1975).
- A.R. Buhl, H.L. Dodds Jr, J.C. Robins, R.A. Lillie, O.W. Hermann,
R.J. Hinton:
A User's Manual for TASK - A Generalized One-Dimensional Transport and Diffusion Kinetics Code
ORNL-TM-3811 (December 1972).
CCC-0256/01:
CCC-0256/01: FORTRAN-IV
E.T. Tomlinson, J.C. Robinson
University of Tennessee
Knoxville, Tennessee, U.S.A.
H.L. Dodds
Savannah River
Charleston, South Carolina, U.S.A.
R.A. Lillie
Neutron Physics Divsion
Oak Ridge National Laboratory
Oak Ridge, Tennessee 37830, U.S.A.
CCC-0256/01:
CCC0256_01.001 SOURCE PROGRAM (F4,EBCDIC) 3912 records
CCC0256_01.002 SAMPLE PROBLEM INPUT DATA (CASE 1) 337 records
CCC0256_01.003 SAMPLE PROBLEM INPUT DATA (CASE 2) 337 records
CCC0256_01.004 SAMPLE PROBLEM PRINTED OUTPUT (CASE 1) 1396 records
CCC0256_01.005 SAMPLE PROBLEM PRINTED OUTPUT (CASE 2) 2211 records
- F. Space
Time Kinetics, Coupled Neutronics Hydrodynamics Thermodynamics
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