Structural Screening.

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.