Glossary - doe-hdbk-1101-20040010

DOE-HDBK-1101-2004

GLOSSARY

Accident, Accident Event Sequence

An unplanned event or sequence of events that has an undesirable consequence.

Aggregate Threshold Quantity

The total amount of a particular hazardous chemical contained in vessels that are

interconnected, or contained in a process and nearby unconnected vessels that may be

adversely affected by an incident at that process.

Atmospheric Tank

A storage tank that has been designed to operate at pressures from atmospheric pressure 1.01

x 106 dynes/cm2 (14.7 psia) through 1.05 x 106 dynes/cm2 (15.2 psia).

Audit (Process Safety Audit)

An inspection of a plant or process unit, drawings, procedures, emergency plan, and/or

management systems by an independent team.

Battery Limits

That portion of a chemical plant in which the actual processes are carried out, as distinguished

from storage buildings, offices, and other subordinate structures.

Boiling Point

The initial temperature at which a liquid begins to pass into the gaseous phase at a pressure of

1.01 x 106 dynes/cm2 (14.7 psia). If an accurate boiling point is not available, see ASTM

D-86-62.

Catastrophic Release

A major uncontrolled emission, fire, or explosion, involving one or more highly hazardous

chemicals, that presents serious danger to employees in the workplace or to the public.

Consult

To exchange information and solicit input and participation from workers and their

representatives in developing a written employee action plan and process hazard analyses;

and to provide employees with access to information required under the Rule.

Contractor

For the purposes of this document, contractor in the PSM Rule refers to DOE subtier

contractors, i.e., subcontractors of DOE contractors.