Application Guidance.

DOE-STD-3014-96

to be acted on by a given physical stress;

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;

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-m Aerodynamic Equivalent Diameter (AED) and

less;

a unique designator for each particular material and

form found in the facility;

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