Exposure Evaluation.

DOE-STD-3014-96

For each such impact location, (1) the extent of local and global damage

and depth of penetration, (2) identification of structural failures, (3) path and

final location of missiles, (4) location of fuel, and (5) damage status of

safety-class SSCs. (Derived)

Accident scenario information. (Available from existing facility safety

analysis documents)

Outputs:

Release scenarios for each of the aircraft subcategory impact locations that

could result in damage that could lead to a release (or a finding that no

release would actually occur).

For each release scenario, the fraction of the facility area and/or skid area

where the aircraft impact could lead to the scenario.

The annual frequency of each such release scenario and the total of all

such frequencies (i.e., the final release frequency).

A list of the release scenarios that contribute to the total annual release

frequency exceeding the release frequency evaluation guideline (if any).

Exposure Evaluation. Exposure evaluation consists of performing a detailed but still

3.6

conservative analysis of the potential hazardous material exposure to any member of the

public (and, where appropriate, to onsite workers) resulting from an aircraft crash into the

facility. The results of the release frequency evaluation (for those scenarios that could

result in a material release) are used to define the specific source term and exposure

scenarios. This process considers how much of the facility is damaged, how much of the

hazardous material available in the facility is affected, what release mechanisms affect

the material, how much of the material is converted into a form that can be absorbed into

the body and do harm, and what energy is associated with the release. The result of this

analysis is expressed as a dose (for radioactive materials) or a concentration (for

chemical hazards) to the maximally exposed individual at or beyond the site boundary.

The methodology for the analysis is provided in Section 7.3. Once this step is

accomplished, the analysis required under this standard is complete and the results are

documented.