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Methodology for Evaluating the Integrity of Structures. Systems
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DOE Standard Accident Analysis For Aircraft Crash Into Hazardous Facilities
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Figure 2: Structural Evaluation Outline


DOE-STD-3014-96
An outline of the structural evaluation process to analyze the adverse effects of an
aircraft impact is provided in Figure 2. The process allows for some initial
screening prior to performing a detailed structural evaluation. The amount of
screening depends on the existence of building supported safety-related
structures, systems, and components (SSCs) in the vicinity of the potential impact
locations. If no safety-related SSCs are present in the vicinity of potential impact
locations, optional structural and release frequency screening is possible prior to
performing a detailed structural evaluation. If safety-related SSCs are present, the
structural screening, although it cannot be used to screen out entire structures, is
still useful for identifying nonsafety-related SSC locations, which can be screened
out from further structural response analysis.
Structural Screening. Given that the frequency of aircraft impact from all types of aircraft
6.2
in the Impact Frequency Evaluation (Section 5.3) exceeds the guideline (see Section 4.2),
the first step in the structural evaluation analysis, as an option, is to perform a structural
screening prior to undertaking a more detailed structural response evaluation. If there are
no building supported safety-related SSCs in the vicinity of the impact locations and if the
entire structure passes the structural response guideline in Section 4.3, no further analysis
and evaluation will be needed. The structural screening assumes that the various types of
aircraft applicable to the structure under consideration are identified and their mass and an
estimate of maximum speed are available for estimating maximum kinetic energy. These
data, along with the data/information listed as inputs in Section 3.3.1, will be used to
perform structural screening, which consists of the following steps:
Step 1. Identify locations for screening. Based on the location of hazardous materials
within the facility, accident scenario information, the location of safety-related equipment,
and the facility layout, prepare a list of potential aircraft impact locations. Identify those
locations where building-supported safety-related SSCs are present. These impact
locations cannot be screened out from further evaluation. The structural screening is
performed on the remaining locations.
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