Definitions - Continued

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.