Selection of Target SSCs, Angle, and Location of Impact.

DOE-STD-3014-96

locations of major components and fuel, which can be

obtained from published literature on the same type of aircraft.

The variation of load capacity due to fuselage buckling or

crushing (whichever is lower) as the crushing length

progresses from the aircraft nose toward the rear can be

obtained from the manufacturer or calculated using pertinent

data from published literature on the same type of aircraft.

When an aircraft impacts a target, the potential for damage

from secondary missiles should be considered in order to

evaluate the adequacies of safety-related SSCs in the vicinity

of the primary impact area.

The velocity of the secondary missiles at the instant of

detachment from the main body of the aircraft can be

calculated by methods that are well established in the

industry, such as the method developed by Riera

(Reference 3). Alternatively, it should be conservative to

assume that the initial velocity of such secondary aircraft

missiles is equal to the impact velocity of the primary aircraft

missile.

Selection of Target SSCs, Angle, and Location of Impact.

6.3.1.2

a. The list of target SSCs and their barriers that should be evaluated for

adverse effects (listed in Section 6.1.1) from aircraft missile impacts

can be based on available facility safety analyses. The selection of

these targets is a joint activity of the structural engineer and the

facility safety analyst. Using insights derived from any existing safety

analysis, the safety analyst should provide the structural engineer with

lists of potential targets whose failure could lead to the release of