CCC-0547 TWODANT-SYS.DANTSYS

1. NAME OR DESIGNATION OF PROGRAM:  TWODANT-SYS; DANTSYS3.0.

3. DESCRIPTION OF PROGRAM OR FUNCTION

TWODANT-SYS: There are three major codes in this system. ONEDANT solves the one-dimensional multigroup transport equation in plane, cylindrical, spherical and two-angle plane geometries. TWODANT solves the two-dimensional multigroup transport equation in x-y, r-z, and r-theta geometries. TWOHEX solves the two-dimensional multigroup transport equation in equilateral triangular meshes in the x,y plane. TWODANT-SYS accepts the basic multigroup cross sections for isotopes, in either of the standard interface files (ISOTXS or GRUPXS) or in a card-image library whose form is referred to as Los Alamos, ANISN, or FIDO.
DANTSYS: replaces TWODANT-SYS and includes five major codes. ONEDANT solves the one-dimensional multigroup transport equation in plane, cylindrical, spherical and two-angle plane geometries. TWODANT solves the two-dimensional multigroup transport equation in x-y, r-z and r-theta geometries. TWOHEX solves the two-dimensional multigroup transport equation on equilateral triangular meshes in the x,y plane. THREEDANT solves the three-dimensional multigroup transport equation in x-y-z and r-z-theta geometries. TWODANT/GQ solves the two-dimensional transport equation in x-y and r-z geometries on general quadrilaterals. DANTSYS accepts the basic multigroup cross sections for isotopes, in either of the standard interface files (ISOTXS or GRUPXS)or in a card-image library whose form is referred  to as Los Alamos, ANISN, or FIDO. PSR-317/TRANSX2.15 will translate  MATXS libraries into these formats. ONEDANT, TWODANT and TWOHEX were included in TWODANT-SYS, THREEDANT and TWODANT/GQ were added to the  package in August 1995 with the first public release of DANTSYS.

4. METHOD OF SOLUTION

ONEDANT, TWODANT, TWODANT/GQ and THREEDANT use  discrete ordinates approximation for treating the angular variation  of the particle distributions. The diamond difference scheme is used for phase space discretization. In TWODANT and THREEDANT there is an option to use the adaptive weighted diamond method. Both inner and outer iterations are accelerated using the diffusion synthetic acceleration method. TWOHEX uses the discrete ordinates form for treating the angular variation of the particle distribution, and a nodal scheme is used for phase space discretization. Both inner and  outer iterations are accelerated using the Chebyshev acceleration method.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The codes are variably dimensioned with a flexible sophisticated data management and transfer capability.

6. TYPICAL RUNNING TIME

TWODANT-SYS: Running time is problem dependent. On the Cray X-MP, a
69 group, S16, P3 scatter, 500 space-point keff calculation for a
light water reactor took about 48 seconds using ONEDANT. On a
Cray-1S, a four group calculation of the eigenvalue of a midplane whole core model of the Fast Test Reactor took about 45 seconds using TWOHEX. A four group adjoint calculation of the eigenvalue of  the r-z model of the FTR took about 15 seconds on a Cray 1 using TWODANT. The sample problem requires about 1 minute on an 80486-33 PC.
DANTSYS: Running time for each solver is directly related to problem size and the platform being used. In ONEDANT a modest sized problem  of 30 groups and 100 mesh points runs in less than 2 seconds on a CRAY-YMP. In TWODANT a 31 x 60 mesh, S4, 4 group problem takes 7
seconds on the YMP. In THREEDANT a 32x32x20 mesh, S8, 4 group problem takes 52 seconds to converge on the YMP and 5 minutes on an  IBM RS/6000/590. A four group calculation of the eigenvalue of a
midplane whole core model of the Fast Test Reactor took about 20 seconds on a YMP.

NEADB ran the three test cases included in this package on a DEC VAX 8810 computer. CPU times for the different cases varied between 16 and 29 seconds.

The four sample problems -
1- standard K calculation in cylindrical geometry (ONEDANT)
2- edits on problem 1
3- standard K calculation in r-z geometry (TWODANT)
4- standard K calculation in sixth core geometry (TWOHEX) stacked on file SAMPLE.DAT, were executed at the NEA-DB on a 66-MHz PC/80486 in about 30 seconds of elapsed time.

The four sample problems -
1- standard K calculation (ONEDANT)
2- edits (only) on problem 1 (ONEDANT)
3- standard K calculation (TWODANT)
4- standard K calculation (HEXDANT)
were executed at the NEA-DB in about 12 seconds of real time (9 s. user + 2.5 s. system). More detailed information on execution time is given in the output of the sample cases.

A few minutes for the test case provided.

A few minutes for the test case provided.

7. UNUSUAL FEATURES OF THE PROGRAM:

8. RELATED AND AUXILIARY PROGRAMS:

10. REFERENCES

R.D. O'Dell:
Standard Interface Files and Procedures for Reactor Physics Codes,
Version IV
Los Alamos Scientific Laboratory report LA-6941-MS (September 1977)

- F.W. Brinkley:
  File Descriptions for Each Version of TWODANT-SYS
  LANL Informal Notes (February 1990).
- R. Douglas O'Dell et al.:
  Revised User's Manual for ONEDANT - A Code Package for
  One-Dimensional, Diffusion-Accelerated, Neutral-Particle Transport
  LA-9184-M, Rev. Manual (UC-705 Issued: December 1989).
- W.F. Walters et al.:
  User's Guide for TWOHEX - A Code Package for Two-Dimensional,
  Neutral-Particle, Transport in Equilateral Triangular Meshes
  LA-10258-M (July 24, 1989), (Updated Dec. 1989).
- R.E. Alcouffe et al.:
  User's Guide for TWODANT - A Code Package for Two-Dimensional,
  Diffusion-Accelerated, Neutral-Particle, Transport
  LA-10049-M (Revised Feb. 1, 1990).
- Angle-Dependent Surfaces Sources for TWODANT,
  TWODANT Extras Array Input
  (December 19, 1988).
_ F.W. Brinkley:
  File Descriptions for Each Version of TWODANT-SYS
  LANL Informal Notes (February 1990).
- R. Douglas O'Dell et al.:
  Revised User's Manual for ONEDANT - A Code Package for
  One-Dimensional, Diffusion-Accelerated, Neutral-Particle Transport
  LA-9184-M, Rev. Manual (UC-705 Issued: December 1989).
- W.F. Walters et al.:
  User's Guide for TWOHEX - A Code Package for Two-Dimensional,
  Neutral-Particle, Transport in Equilateral Triangular Meshes
  LA-10258-M (July 24, 1989), (Updated Dec. 1989).
- R.E. Alcouffe et al.:
  User's Guide for TWODANT - A Code Package for Two-Dimensional,
  Diffusion-Accelerated, Neutral-Particle, Transport
  LA-10049-M (Revised Feb. 1, 1990).
- Angle-Dependent Surfaces Sources for TWODANT,
  TWODANT Extras Array Input
  (December 19, 1988).
_ F.W. Brinkley:
  File Descriptions for Each Version of TWODANT-SYS
  LANL Informal Notes (February 1990).
- R. Douglas O'Dell et al.:
  Revised User's Manual for ONEDANT - A Code Package for
  One-Dimensional, Diffusion-Accelerated, Neutral-Particle Transport
  LA-9184-M, Rev. Manual (UC-705 Issued: December 1989).
- W.F. Walters et al.:
  User's Guide for TWOHEX - A Code Package for Two-Dimensional,
  Neutral-Particle, Transport in Equilateral Triangular Meshes
  LA-10258-M (July 24, 1989), (Updated Dec. 1989).
- R.E. Alcouffe et al.:
  User's Guide for TWODANT - A Code Package for Two-Dimensional,
  Diffusion-Accelerated, Neutral-Particle, Transport
  LA-10049-M (Revised Feb. 1, 1990).
- T.M. Jordan:
  Informal README.EMP Notes
  (September 1992).
- Angle-Dependent Surfaces Sources for TWODANT,
  TWODANT Extras Array Input
  (December 19, 1988).
- Cross Sections Available for CCC-0547/TWODANT-SYS
  (April 21, 1994).
- F.W. Brinkley:
  File Descriptions for Each Version of TWODANT-SYS
  LANL Informal Notes (February 1990).
- R. Douglas O'Dell et al.:
  Revised User's Manual for ONEDANT - A Code Package for
  One-Dimensional, Diffusion-Accelerated, Neutral-Particle Transport
  LA-9184-M (December 1989).
- W.F. Walters et al.:
  User's Guide for TWOHEX - A Code Package for Two-Dimensional,
  Neutral-Particle, Transport in Equilateral Triangular Meshes
  LA-10258-M (December 1989).
- R.E. Alcouffe et al.:
  User's Guide for TWODANT - A Code Package for Two-Dimensional,
  Diffusion-Accelerated, Neutral-Particle, Transport
  LA-10049-M (February 1990).
- T.M. Jordan:
  Informal README.EMP Notes
  (September 1992).
- Angle-Dependent Surfaces Sources for TWODANT,
  TWODANT Extras Array Input
  (December 19, 1988).
- R.E. Alcouffe et al.:
  DANTSYS: A Diffusion Accelerated Neutral Particle Transport Code
  System
  LA-12969-M (June 1995)
- R.E. Alcouffe et al.:
  DANTSYS: A Diffusion Accelerated Neutral Particle Transport Code
  System
  LA-12969-M (June 1995)
- DANTSYS3.0 Modification (March 17, 1997)

11. MACHINE REQUIREMENTS

(1) TWODANT-SYS: The code runs on Cray or VAX computers and SUN Sparcstations and 80386 or 486 PCs. The PC version uses 8 Mbytes of memory. (2) DANTSYS: The code runs on Cray YMP, SUN SparcStation IPX, IBM RS/6000 Model 590, Hewlett Packard 9000 Model 735, and Silicon Graphics-cpu IP22-mips.

The four sample problems were run at the NEA-DB on a DELL 466/L PC (processor 80486, 66 MHz, 16 Mbytes of RAM). The TWODANT executable with small (SCM) and large (LCM) core memory parameters 50000 and 60000, respectively, uses 8 Mbytes of RAM. The  file size is 1.9 Mbytes.

The program was installed at NEA-DB on a Sun SparcStation.

At the NEA DB the program was tested on an IBM RS/6000 7043-260.

At the NEA DB the code was tested on a Dell PE 1650, INTEL BI-P3 1400 MHz.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

A FORTRAN-77 compiler is required. The Cray version runs under UNICOS. The VAX version runs under VMS and includes a C routine to obtain dynamic memory. The SUN workstation version uses a UNIX operating system. The PC version includes an executable that runs under DOS and Windows.

UNICOS 6.1 (CRAY-XMS) with compiler FORTRAN-77 5.0.1.0.

VMS 5.3 (DEC VAX 8810).

MS-DOS 6.0; FORTRAN77 compiler Lahey F77:-EM/32 Version 5.11; linker 386LINK.

The program was installed at the NEA-DB under SunOS 4.1. The source codes were compiled with the f77 SC1.0 compiler.

At the NEA DB, the code was tested on UNIX AIX version 4.3 with GNU gcc et g77 compiler.

At the NEA DB the code was tested on Red Hat Linux 7.3 with the Lahey/Fujitsu Fortran 95 Linux PRO version 6.1 compiler.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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:    Los Alamos National Laboratory
                 Los Alamos, New Mexico, U. S. A.

version CCC-0547/08 contributed by:
                 Mr. Cornelius H. M. BROEDERS
                 Inst. fuer Neutronenphysik
                 und Reaktortechnik
                 Forschungszentrum Karlsruhe
                 Postfach 3640
                 D-76021 KARLSRUHE
                 Germany

miscellaneous    mag tapeREADME Information file                    MISTP
miscellaneous    mag tapeREADME.2 Information file                  MISTP
source program   mag tapeDANT Source code                           SRCTP
test-case output mag tapeSENDOUTPUT Output file                     OUTTP
test-case data   mag tapeSHORTSENDTC Test problem                   DATTP
source program   mag tapeDANSTYS.UPD Updated tolcm.F & perr.F srces SRCTP
report                   LA-12969-M (June 1995)                     REPPT

File name	File description	Records
CCC0547_01.001	Information file	545
CCC0547_01.002	TWODANT on line manual	3368
CCC0547_01.003	TWOHEX on line manual	2368
CCC0547_01.004	JCL to prepare executable file	143
CCC0547_01.005	JCL to add correction	131
CCC0547_01.006	Update FORTRAN source for TWODANT	87695
CCC0547_01.007	Update corrections	6
CCC0547_01.008	SEGLDR directives for segmentation	161
CCC0547_01.009	Sample cases input	251
CCC0547_01.010	Sample cases output	3736

File name	File description	Records
CCC0547_02.001	This information file	100
CCC0547_02.002	TWODANT-SYS main program FORTRAN source	964
CCC0547_02.003	TWODANT-SYS subroutines FORTRAN source	93721
CCC0547_02.004	C subroutine to obtain dynamic memory	14
CCC0547_02.005	Command procedure to compile and link	9
CCC0547_02.006	Sample cases for ONEDANT, TWODANT, TWOHEX	251
CCC0547_02.007	TWODANT on line manual	3368
CCC0547_02.008	TWOHEX on line manual	2368
CCC0547_02.009	Output for sample cases	3736

File name	File description	Records
CCC0547_04.001	TWODANT-SYS Information file	325
CCC0547_04.002	Summary of TWODANT-SYS files	22
CCC0547_04.003	Notes on the PC version of TWODANT	168
CCC0547_04.004	Notes on how to run in backgrd under WINDOWS	109
CCC0547_04.005	Notes on the utility for printing/viewing	100
CCC0547_04.006	Compressed file with the source (*.F) files	0
CCC0547_04.007	Compressed file with the TWODANT executable	0
CCC0547_04.008	Compressed file with other auxiliary files	0
CCC0547_04.009	Sample output file (four sample problems)	3758
CCC0547_04.010	DOS file-names	9

File name	File description	Records
CCC0547_05.001	TWODANT information file	146
CCC0547_05.002	Listing of files	44
CCC0547_05.003	Main routine	964
CCC0547_05.004	Input routines	42045
CCC0547_05.005	Output routines	6986
CCC0547_05.006	Non-optimized solver routines	33833
CCC0547_05.007	Optimized solver routines	9893
CCC0547_05.008	C routine for dynamic source	14
CCC0547_05.009	Fortran routine to handle Sun IEEE f.p.	23
CCC0547_05.010	Shell script to prepare TWODANT executable	229
CCC0547_05.011	Shell script to clean up subdirectories	138
CCC0547_05.012	Sample cases	251
CCC0547_05.013	TWODANT on line manual	3368
CCC0547_05.014	TWOHEX on line manual	2368
CCC0547_05.015	Output for sample cases	3736
CCC0547_05.016	Remarks on building and running TWODANT	34

File name	File description	Records
\dant	Directory with DANT source code	10880505
\sendoutput	test problem outputs from different platform	3213276
shortsendtc	Test problem input data	17243
inp_test	Test problem input data	3491
README	Information file	8879
README.2	Information file	1352
DANTSYS.UPD	info. on updated tolcm.F & perr.F sources	5229
c547.pdf	Report LA-12969-M (June 1995)	49113540