CCC-0544 CEPXS/ONELD.

CEPXS/ONELD.

CEPXS generates cross sections to be input to the ONELD code. ONELD is a one-dimensional coupled electron-photon transport code.

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.

ONELD can be used for neutron transport calculations. However, only source calculations can be performed.

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. aluminum consisting of 40 groups, s16 and 50 fine mesh points ran in about 16 seconds. The sample problems ran in a few seconds on a Dell Pentium IV 2.8 GHz running Windows XP SP 2.0. The cross section preparation time was about 37 seconds.

• 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

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).

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.

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.
              Sandia National Laboratory
              Albuquerque, New Mexico, U. S. A.