Impact Frequency Evaluation Guideline.

DOE-STD-3014-96

Section A.1). In those rare cases, the following additional screening guidelines

may be applied:

Radiological exposures - the facility inventory exceeds 25 times the Hazard

Category 2 threshold quantities provided in DOE-STD-1027-92;2

Hazardous material exposure - Emergency Response Planning Guidelines -

Level 3 (ERPG-3), as established by the AIHA to the maximally exposed worker

located at or beyond 300 m (984 ft) from the facility; or

Hazardous material exposure where ERPG-3 has not been established - the

Immediately Dangerous to Life and Health (IDLH) criteria specified in the latest

National Institute of Occupational Safety and Health (NIOSH) recommendation (or

a successor document) to the maximally exposed worker located at or beyond

300 m (984 ft) from the facility.

Impact Frequency Evaluation Guideline. The results of the impact frequency evaluation

4.2

step will be compared to the following guideline for the frequency of aircraft impact:

Frequency of aircraft impact into a facility from all types of aircraft - 1E-6/y.

4.3

Structural Screening and Evaluation Guideline. The results of the structural response

calculation will be compared to the following guidelines for various types of damage:

Local damage to reinforced concrete targets:

scabbing - to prevent scabbing, required wall thickness is 110 percent of

the predicted scabbing thickness;

Threshold quantities for criticality are not used for comparison to the facility inventory, since the comparison is based

on dose.