Definitions - Continued

DOE-STD-6002-96

(without regard for the likelihood or credibility of off-normal conditions or consequence

Inherent--An adjective to describe a design feature or function that operates without the appli-

cation of a separate input such as an activation signal. An example of an inherent design fea-

ture is a fail-safe valve that closes automatically on loss of power.

ITER--International Thermonuclear Experimental Reactor.

Maintenance--The organized activity, both administrative and technical, directed toward keep-

ing structures, systems, and components in good operating condition, including both preventive

and corrective aspects.

May--Permission; neither a requirement nor a recommendation.

Monitoring--Continuous or periodic measurement and/or observation of parameters or deter-

mination of the status of a system or component. Sampling may be involved as a preliminary

step to measurement.

Normal Conditions--Conditions associated with the routine operation of the facility.

Normal Operations--Activities at a facility performed within specific normal operational limits

and conditions, including startup, operation, shutdown, maintenance, and testing. Normal

operations do not include anticipated operational occurrences.

Off-Normal Conditions--Conditions beyond anticipated operational occurrences that include

all credible events.

Passive--An adjective that describes a function that requires no operation or movement of

component parts.

Physical Separation--Isolated by geometry (distance, orientation, etc.), by appropriate

barriers, or a combination thereof.

Postulated Initiating Events (PIE)--Identified happenings or conditions that lead to anticipated

operational occurrences, off-normal conditions, and their consequential failure effects.

Potential Safety Concern--A feature and/or process determined to be capable of challenging

a public safety function and to which a risk-informed decision-making process is applied during

design.

Public Safety Function--Essential characteristics or performance needed to ensure the safety

and the protection of the public and the environment during operations, anticipated opera tional

occurrences, and off-normal conditions.

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