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Definitions - Continued - std30140015
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DOE Standard Accident Analysis For Aircraft Crash Into Hazardous Facilities
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Definitions - Continued - std30140017


DOE-STD-3014-96
Crash: See the definition of an aircraft crash.
Crash Location Distribution: The normalized conditional probability distribution (i.e., given that
the crash occurs) in terms of the x and y coordinates of a coordinate system centered at the
relevant runway.
Damage Ratio: The fraction of material at risk (MAR) actually impacted by the accident-
generated conditions.
Distance Inclusion Criteria: The specified distance between the facility of interest and the
flight sources within which aircraft operations are assumed to have a measurable impact on the
aircraft crash impact frequency and are to be included in the analysis.
ERPG-2 (Emergency Response Planning Guidelines - Level 2): The maximum airborne
concentrations below which it is believed that nearly all individuals could be exposed for up to
1 hour without experiencing or developing irreversible or other serious health effects or
symptoms that could impair an individual's ability to take protective actions.
ERPG-3 (Emergency Response Planning Guidelines - Level 3): The maximum airborne
concentrations below which it is believed that nearly all individuals could be exposed for up to
1 hour without experiencing or developing life-threatening health effects.
Effective Area: The area of a potential target that is vulnerable to an aircraft crash. This area
is a planar, or "horizontal," mapping of areas that an aircraft could crash into. It is derived as a
function of physical target characteristics (width, length, and height), as well as aircraft and flight
characteristics such as wing span, impact angle, and heading.
Exposure Evaluation: A calculation of the predicted airborne dose, as a function of distance,
to which an individual would be exposed as a result of the accidental release of hazardous
chemical or radioactive materials in specified weather conditions.
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