LWR Benchmark Cases 7/15/2005
Updated 12/20/2006
NUREG/CR-6361, "Criticality Benchmark Guide for Light-Water-Reactor Fuel
in Transportation and Storage Packages," Appendix A, contains SCALE
input files for 180 benchmark cases. The original input files were
posted on the SCALE Web site in 1997. Two input files from the original
were updated in 2000. The files Bw1810c.in and Bw1810g.in were replaced
with Bw1810cr.in and Bw1810gr.in. The models for these two cases come
from BAW-1810, and correspond to cores 20 and 18 respectively. In
BAW-1810, Cores 18-20 are different from the others, in that they are
based on 16X16 Combustion Engineering fuel assemblies as opposed to
15X15 assemblies. These cores end up being 80X80 arrays, while all the
rest are 81X81 arrays. However, they were originally modeled as 81X81
arrays in NUREG-6361, and therefore had an extra row and column of fuel
pins. The calculated k-eff values for the corrected files were not
statistically different from those published in NUREG-6361.
These files have been updated for compatibility with SCALE 5 by using
GeeWiz to convert them. Some of the files required manual modifications.
Most of these were minor adjustments for nuclide distributions that did
not sum to 100%. Special thanks to Maik Hennebach of WTI GmbH and
Franz Hilbert of Nuclear Cargo + Service GmbH for their contributions to
these adjustments.
*************************************************************************
NOTE: These files should NOT be used with CENTRM. Many of these files use
MORE DATA to input Dancoff factors for additional fuel types. CENTRM does
not recognize or use the Dancoff factors input in MORE DATA. The MORE
DATA input needs to be replaced with additional LATTICECELL models for
the additional fuel types before using these cases with CENTRM.
*************************************************************************
The file nureg-cr-6361.exe is a self-extracting WinZIP file that
contains the SCALE 5 input files. By default it installs to
c:\scale5.1\validation\nureg-cr-6361. The RUNALL.BAT file will run all
cases using the batch5 command file. Summary results from the ORNL
output files are provided in the "ornl-keff-results.txt" file. The
spreadsheet in "ornl-keff-results.xls" compares the SCALE 5 results with
the original SCALE 4.3 results. Users can run the RESULTS.BAT file to
get the results from their cases to compare with the ORNL results.
RESULTS.BAT writes the results to the "keff-results.txt" file.
**************************************************************************
Addendum: 12/20/2006
The files have been updated to add "parm=nitawl" to the first line of all
cases so that these files will run correctly in both SCALE 5.0 and 5.1.
Menu