Introduction - std30140009

DOE-STD-3014-96

INTRODUCTION

1.1

Scope. This standard provides the user with sufficient information to evaluate and assess

the significance of aircraft crash risk on facility safety without expending excessive effort

where it is not required. The implementation guidance provides a framework of step-wise

increases in analytical sophistication aimed at eliciting only that amount of analysis needed

to demonstrate that aircraft crash either does or does not exceed a risk level of concern

equivalent to what is generally applied to other sources of risk from the operation of

hazardous material facilities. This standard establishes an approach for performing a

conservative analysis of the risk posed by a release of hazardous radioactive or chemical

material resulting from an aircraft crash into a facility containing significant quantities of

such material.1 This approach can establish whether a facility has a significant potential

for an aircraft impact, and, given an aircraft impact, whether a facility has the potential for

an accident producing significant offsite or onsite consequences. The analysis is based

on the structural properties of a facility and the inventory at a facility.

This approach contains several interrelated analytical modules: (1) a methodology for

determining the frequency of aircraft impact into a facility, based upon a conservative

simplified equation; (2) a methodology to determine the effect of an aircraft impact into a

facility through the performance of structural response analysis; (3) a methodology to

determine the frequency of a release from a facility, given the effect of an aircraft impact;

and (4) a methodology for evaluating the exposure resulting from a release. Evaluation

guidelines are provided to aid in determining the need to conduct each subsequent

analytical step. The methodologies take into consideration items determined to be

important to understanding the risk from aircraft crash into hazardous facilities. These

items include number of aircraft operations/flights; crash probabilities; aircraft

characteristics; crash kinematics; impacting missiles; local, global, and vibratory structural

damage; structure characteristics; source terms; release energy; and meteorological

conditions.

The thresholds for what constitutes "significant quantities" of material are established in Section 1.3, "Applicability."