Central Registry Toolbox Code Version(s):
Code Owner: National Oceanic and Atmospheric
Description: The Arial Locations of
Hazardous Atmospheres (ALOHA) is atmospheric
dispersion model maintained by the Hazardous
Materials Division of National Oceanic and Atmospheric
Administration (NOAA). ALOHA is one of three
separate, integrated software applications in
the Computer-Aided Management of Emergency Operations
(CAMEO) suite. While the other two software
applications: Cameo is primarily a database
application and Marplot is the mapping application.
ALOHA is used primarily for the evaluations of the consequences of atmospheric releases of chemical species. In addition to safety analysis
applications in the Department of Energy (DOE)
Complex, ALOHA is applied for emergency response
situations and for training. ALOHA allows the
user to estimate the downwind dispersion of
a chemical cloud based on the toxicological/physical
characteristics of the released chemical, atmospheric
conditions, and specific circumstances of the
release. Graphical outputs include a "cloud
footprint" that can be plotted on maps
with MARPLOT to display the location of other
facilities storing hazardous materials and vulnerable
Mark W Miller, Mark.W.Miller@noaa.gov
and Bill Lehr, Bill.Lehr@noaa.gov
at NOAA are the primary contacts for ALHOA.
The most recent release of ALHOA may be directly
downloaded at http://www.epa.gov/emergencies/content/cameo/aloha.htm.
ALHOA V5.2.3 and other previous releases can
be obtained by contacting Mark W Miller, Mark.W.Miller@noaa.gov.
In May 2004, the DOE performed an evaluation
of ALOHA against DOE's safety software quality
assurance criteria. A gap analysis report was
generated that identifies the strengths and
weaknesses based upon ASME NQA-1 criteria. Upon
completion of this evaluation, ALOHA V5.2.3
was included in DOE's safety software Central
Registry as a safety analysis toolbox code.
Inclusion into DOE's safety software Central
Registry provides to DOE sites knowledge of
the pedigree of the safety software quality
assurance (SSQA) level for ALOHA V5.2.3. If
another version of ALOHA is used, DOE sites
must assume the responsibility to determine
that the quality assurance level meets DOE SSQA
requirements. DOE published guidance for the
use of ALOHA V5.2.3. This guidance is recommended
for all DOE applications of ALOHA V5.2.3.
The latest version of ALOHA (V5.4) released
in February 2006 added the ability to model
the hazards associated with fires and explosions.
With this major update, users can now estimate
the hazards associated with jet fires (flares),
pool fires, vapor cloud explosions (VCE), BLEVEs
(Boiling Liquid Expanding Vapor Explosions),
and flammable regions (flash fires) as well
as toxic threats. The User manual was completely
updated to include extensive material associated
with fires and explosions.
Reports and publications related to ALOHA:
Note: Non-DOE issued reports and publications
are not endorsed for technical content by DOE.
These reports are provided on this web site
for courtesy to our DOE community.
DOE-EH-220.127.116.11-ALOHA-Gap Analysis, Software
Quality Assurance Improvement Plan: ALOHA Gap
Analysis, May 2004.
ALOHA Computer Code Application Guidance for Documented Safety Analysis,
Thoman, D. C.; O'Kula, K. R.; Laul, J. C.;
Davis, M. W.; and Knecht, K. D.; Comparison
of ALOHA and EPIcode for Safety Analysis Applications,
Journal of Chemical Health & Safety, Volume
13, Number 6, November/December 2006.