MACCS versus GENII: Code comparison Page: 4 of 11
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MACCS versus GENII Code Comparison
1. GENII Installation
GENII Version 1.473 was installed on a PC at Technadyne
Engineering Consultants, Inc. in August 1991. That version,
while not the most recent, is the same as was used by DOE for
the 1991 Draft Environmental Impact Statement on New Production
Reactor Capacity.
2. MACCS Weather File
A MACCS weather file for Hanford was obtained from Sandia
National Laboratories. That file was used by Sandia in the 1990
N-Reactor PRA. It is being provided to LANL on a floppy disk.
3. Utility Programs for Weather Data
Several utility programs for weather file conversion and
comparison were written during the project. These allow
preparation of a GENII Joint Frequency file from MACCS weather
data and removal of rain data from MACCS files so that MACCS and
GENII could be run using the same fundamental weather database.
These programs, in GWBASIC, are being transmitted to LANL on a
floppy disk. User documentation and program listings are being
provided to LANL.
Two steps were taken to validate program JFPREP. JFPREP was
used to prepare a Joint Frequency file with wind speed
breakpoints matching those hard-wired into MACCS using the
weather file described in Section 2. The resulting Joint
Frequency file was compared to the MACCS output table labeled
"BIN WINDROSE SUMMARY" after making corrections for wind
direction indices (from versus to) and the MACCS bin
definitions. This comparison showed that JFPREP processed the
8760 hourly readings of the weather file in a manner equivalent
to MACCS.
JFPREP was also used to prepare a file based on the above
weather data using the same breakpoints as included in the
sample Joint Frequency file supplied with Version 1.473 of
GENII. Sample Problem One of GENII was run with this file so
that results for this problem with the GENII Sample Problem five
years of weather data and the single year of data could be
compared. These runs reported doses of 6.3E-04 and 6.2E-04 Sv,1
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Foster, J. & Chanin, D.I. (Technadyne Engineering Consultants, Inc., Albuquerque, NM (United States)). MACCS versus GENII: Code comparison, report, September 30, 1991; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1183189/m1/4/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.