Commercial Aviation Air Carrier.

DOE-STD-3014-96

For commercial and large military aviation, crashes are assumed to

occur at random throughout the CONUS, and the variation in traffic

volume is reflected by the variation in the number of aircraft handled in

each ARTCC. For small military aviation, the number of crashes varies

among the ARTCCs. Thus, the expected number of crashes per year is

estimated for each ARTCC based on the distribution of crash locations

in the historical record.

Table B-15 in Appendix B provides reasonable estimates of NPf(x,y) for

selected DOE sites, as well as estimates of a minimum, average, and

maximum value applicable for facilities at other locations within the

CONUS.

It is important to recognize that the in-flight analysis for military aviation

given below only applies to normal in-flight operations outside military

operations areas and low level flight ranges. For facilities at or near

these latter types of areas, it is necessary to perform a site-specific

assessment of the impact frequencies associated with activities in these

areas.

The analyses for each of the commercial and military subcategories are

as follows:

1. Commercial Aviation Air Carrier.

Step 9. Refer to Appendix B, Table B-15, and obtain the appropriate site-specific or

generic value of NPf(x,y).

Step 10. Multiply the value of NPf(x,y) by the A value determined for air carriers in

Step 5.