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Application Guidance.
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DOE Standard Accident Analysis For Aircraft Crash Into Hazardous Facilities
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References. - std30140094


DOE-STD-3014-96
to be acted on by a given physical stress;
DR
=
damage ratio - the fraction of MAR actually impacted
by the accident-generated conditions;
ARF
=
airborne release fraction - the coefficient used to
estimate the amount of radioactive material suspended
in air as an aerosol and thus available for transport
due to a physical stress from a specific accident;
LPF
=
leakpath factor - the fraction of the radionuclides in the
aerosol transported through some confinement
deposition of filtration mechanism;
RF
=
respirable fraction - the fraction of airborne
radionuclides as particles that can be transported
through air and inhaled into the human respiratory
system and is commonly assumed to include particles
10-Ám Aerodynamic Equivalent Diameter (AED) and
less;
i
=
a unique designator for each particular material and
form found in the facility;
j
=
a unique designator for each release mechanism
acting upon a given material and form found in the
facility (e.g., j=1 for crush/impact, j=2 for fire, j=3 for
explosion).
For valid application, the source term calculation should be based on the
development of aircraft impact scenarios at a level of detail that allows for
the specification of appropriate values for the above parameters.
However, as discussed in DOE-STD-3009-94 (Reference 2), a graded
approach should be applied to scenario development to ensure that the
level of effort required to perform the analysis does not divert resources
from areas where effort could be spent more appropriately. Further
information on the development of radioactive material source terms is
89


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