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Figure 2b: Structural Evaluation for Release Frequency Evaluation
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DOE Standard Accident Analysis For Aircraft Crash Into Hazardous Facilities
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Structural Evaluation - std30140063


DOE-STD-3014-96
Step 2. Identify critical missiles. Identify a set of missiles to be used for local and global
structural response evaluations by either (1) performing a site-wide basis aircraft hazard
analysis (see Section 2.1 of Reference 1) or (2) as follows:
Select two bounding missiles considering all applicable categories/subcategories
and types of aircraft, one for structural local damage evaluation and the other for
structural collapse evaluation. The bounding missile for local damage evaluation
will be the aircraft engine (or any of the nearly rigid and compact components)
having the highest kinetic energy (i.e. one-half the engine mass times the square
of the impact velocity). The bounding missile for structural collapse evaluation will
be the aircraft having the highest kinetic energy of impact (i.e. one-half the total
aircraft mass times the square of the impact velocity). Reasonable estimates of
horizontal and vertical velocities to be used for assessing bounding kinetic energy
values are the highest velocity values (corresponding to probability 0.0075) given,
for each aircraft subcategory, in Table 2-1 of Reference 1.
Step 3. Perform structural response evaluations. Perform a building local damage
evaluation in accordance with Section 6.3.2. If the local damage evaluation results meet
the guideline provided in Section 4.3, perform a building collapse evaluation using the
energy balance method in accordance with Section 6.3.3. If standardized charts, tables,
or nomographs are available, they can be used for structural screening if they are
developed using conservative criteria and methods equivalent to those described in
Section 6.3.
Step 4. Identify locations meeting guidelines. Identify the structure locations meeting the
guidelines in Section 4.3, i.e., identify the structure locations that are not susceptible to
significant local and global structure damage when impacted by a crashing aircraft. Note
that in the vicinity of these locations, there must not be any building-supported safety-
related SSCs.
Step 5. Test if structure meets guidelines. If there are no building-supported safety-
related SSCs in the vicinity of impact locations, evaluate if all locations within the structure
meet the structural response guidelines of Section 4.3. If yes, the analysis should be
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