CCC-0544: CEPXS ONELD, 1-D Coupled Electron Photon MultiGroup System

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CCC-0544 CEPXS/ONELD. (Abstract last modified 10-JAN-1996)

CEPXS ONELD, 1-D Coupled Electron Photon MultiGroup System

Abstract Table of Contents:

1. NAME OR DESIGNATION OF PROGRAM - CEPXS/ONELD.

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.

Program-name Package-ID Status CEPXS/ONELD CCC-0544/01 Tested CEPXS/ONELD CCC-0544/02 Obsolete CEPXS/ONELD CCC-0544/03 Tested

Machines used: Package-ID Orig.Computer Test Computer CCC-0544/01 VAX under VMS DEC VAX 8810 CCC-0544/03 PC-80486 PC Pentium 75

3. DESCRIPTION OF PROGRAM OR FUNCTION - CEPXS generates cross sections to be input to the ONELD code. ONELD is a one-dimensional coupled electron-photon transport code.

4. METHOD OF SOLUTION - ONELD is an advanced discrete ordinates code that uses linear-discontinuous spatial differencing and diffusion- consistent weighted diamond angular differencing. The equations are solved via source iteration with S-2 synthetic acceleration of the inner iterations.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM - ONELD can be used for neutron transport calculations. However, only source calculations can be performed.

6. TYPICAL RUNNING TIME - Running time is directly related to problem size and to the computer's central processor and data transfer speed. On a Cray YMP, a problem consisting of 1.0 MeV electrons normal on .2107 cm. aluminium consisting of 40 groups, S16 and 50 fine mesh points ran in about 16 seconds. The cross section preparation time was about 37 seconds. The following table corresponds to the PC release.
Memory DOS(4Mb) DOS(8Mb) Win(8Mb)
(8byte words)
1. 206 sec 151 sec 162 sec
8197 scm 8.75 min 8.27 min 8.86 min
209440 lcm
2. 535 sec 425 sec 427 sec
16063 scm 33.37 min 24.48 min 27.65 min
913880 lcm
3. 723 sec 657 sec 660 sec
33956 scm 29.54 min 27.37 min 34.50 min
1587714 lcm

CCC-0544/03:

TYPICAL RUNNING TIME - The three sample problems were run at the NEA-DB on a PC-Brett, Pentium processor, 75 MHz. The corresponding running times for the programs CEPXS and ONELD are displayed in the following table:
         ====================================================
         | Sample problem  |   Input file   |   CPU time    |
         |     number      |      name      |      (s)      |
         |                 |                |---------------|
         |                 |                | CEPXS | ONELD |
         ==================|================|=======|========
         |        1        |  sample1.dat   |   60  | 130.2 |
         |------------------------------------------|--------
         |        2        |  sample2.dat   |  228  | 322.8 |
         |--------------------------------------------------|
         |        3        |  sample3.dat   |  291  | 342.0 |
         |--------------------------------------------------|

7. UNUSUAL FEATURES OF THE PROGRAM -

8. RELATED AND AUXILIARY PROGRAMS -

9. STATUS
CCC-0544/01: 20-JUL-1992 Tested at NEADB
CCC-0544/02: 07-FEB-2001 Obsolete
CCC-0544/03: 10-JAN-1996 Tested at NEADB

10. REFERENCES  -
- Alice F. Rice and Robert W. Roussin (Editors)
  Deterministic Methods in Radiation Transport
  A Compilation of Papers Presented February 4-5, 1992
  ORNL/RSIC-54
CCC-0544/01:
- L.J. Lorence, Jr. et al.:
  Physics Guide to CEPXS - A Multigroup Coupled Electron-Photon
  Cross-Section Generating Code
  SAND89-1685 (October 1989).
- L.J. Lorence, Jr. et al.:
  User's Guide to CEPXS/ONEDANT - A One-Dimensional Coupled
  Electron-Photon Discrete Ordinates Code Package
  SAND89-1661 (September 1989).
- R.D. 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., UC-705 (December 1989).
- L.J. Lorence, Jr. et al.:
  Results Guide to CEPXS/ONELD - A One-Dimensional Coupled Electron-
  Photon Discrete Ordinates Code Package
  SAND89-2211 (July 1990).
CCC-0544/03:
- L.J. Lorence, Jr. et al.:
  Physics Guide to CEPXS - A Multigroup Coupled Electron-Photon
  Cross-Section Generating Code
  SAND89-1685 (October 1989).
- L.J. Lorence, Jr. et al.:
  User's Guide to CEPXS/ONEDANT - A One-Dimensional Coupled
  Electron-Photon Discrete Ordinates Code Package
  SAND89-1661 (September 1989).
- R.D. 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., (December 1989).
- L.J. Lorence, Jr. et al.:
  Results Guide to CEPXS/ONELD - A One-Dimensional Coupled Electron-
  Photon Discrete Ordinates Code Package
  SAND89-2211 (July 1990).
- T. Jordan:
  CEPXS1LD.DOC File
  (August 25, 1992).

11. MACHINE REQUIREMENTS - The code runs on Cray or VAX computers. The Cray version requires fast core size sufficiently large to permit partitioning into SCM and simulated LCM. Random-access auxiliary storage may be occasionally required if simulated LCM storage is insufficient for the problem being executed. An 80386 or 80486 PC is required with at least 4 Mbytes of fast memory. Systems with less than 16 Mbytes of memory require additional hard disk space since the virtual memory manager will require at least the space used by the largest unpacked run image (16 Mbyte).

CCC-0544/03:

HARDWARE REQUIREMENTS - The package CEPXS/ONELD was tested at the NEA/DB on a PC-Brett, Pentium processor, 75 MHz, base memory 640 Kbyte and extended memory 16 MByte.
MEMORY REQUIREMENTS: At least 4 Mbyte of fast memory is needed. All executables will use the virtual memory manager when required (the VMM and the DOS extender are linked with the executables). ONELD, in particular, requires 16 Mbytes of memory, so it will run using the VMM on most machines. Systems with less than 16 Mbyte of memory will require additional hard disk space since the virtual memory manager will require at least the space used by the largest unpacked run image (16 Mbyte).
DISKSPACE REQUIREMENTS 1) EXECUTABLE FILES: The filesize of the PC-executables created using the Lahey compiler and using the linking options -pack -stub runb,vmmb are:
        CEPXS.EXE    -  413 Kbyte
        ONELD.EXE    - 1038 Kbyte
        PRE1D.EXE    -  286 Kbyte
        POST1D.EXE   -  289 Kbyte
        REWRITE.EXE  -  238 Kbyte
        PRINTOUT.EXE -   59 Kbyte
2) LIBRARY FILES: The filesize of the two ASCII library files TAPE9 and TAPE10 are 253 and 2642 Kbyte, respectively.
3) AUXILIARY FILES: The auxiliary and output files produced during the execution of program ONELD require an additional diskspace of the order of 3-4 Mbyte.

12. PROGRAMMING LANGUAGE(S) USED -
CCC-0544/01: FORTRAN+C
CCC-0544/03: FORTRAN-77

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED - A FORTRAN 77 compiler is required. The Cray version runs under the Los Alamos CTSS operating system with the CFTLIB library. The VAX version runs under VMS. The Lahey F77L-EM/32 Fortran compiler, Version 5.01, the Phar Lap Linker, Dos Extender Version 4.1, and Virtual Memory Manager were used to create the executables distributed with this package.

CCC-0544/03:

SOFTWARE REQUIREMENTS - The package CEPXS/ONELD was tested at the NEA/DB on a PC-Brett, Pentium processor, 75 MHz, base memory 640 Kbyte and extended memory 16 MByte, running MS-DOS 6.2. The source code files were compiled using the FORTRAN-77 Lahey compiler F77L/EM-32, Version 5.20, linked using the the Phar Lap Linker, Dos Extender, and Virtual Memory Manager packaged with that compiler.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS -

15. NAME AND ESTABLISHMENT OF AUTHORS -
Contributed by:
          Radiation Shielding Information Center
          Oak Ridge National Laboratory
          Oak Ridge, Tennessee, U. S. A.
Developed by:
          Los Alamos National Laboratory
          Los Alamos, New Mexico, U. S. A.
          Sandia National Laboratory
          Albuquerque, New Mexico, U. S. A.

17. CATEGORIES -

- D. Depletion, Fuel Management, Cost Analysis, and Power Plant Economics
- J. Gamma Heating and Shield Design

Keywords: DISCRETE ORDINATE METHOD, ELECTRONS, MULTIGROUP, ONE-DIMENSIONAL, PHOTON INTERACTION, PHOTON TRANSPORT, SHIELDING