Definitions - std60020007

DOE-STD-6002-96

DEFINITIONS

Active--An adjective used to describe a feature or function of a component whose operation

depends on an external input such as an actuation, mechanical movement, or supply of power.

ALARA--As low as is reasonably achievable.

Anticipated Operational Occurrences--Operational processes deviating from normal opera-

tion that are expected to occur once or more during the operating life of the facility.

Common Cause Failure--The failure of multiple devices or components to perform their func-

tions as a result of a single specific event or cause.

Comparable Industrial Facility--A facility in the industrial sector where workers are exposed

to hazards of a similar nature to those encountered in a fusion facility; for example, heavy lifting,

vacuum, cryogenics, high electrical potentials and/or currents, and radioactivity.

Confinement--A barrier that surrounds radioactive or hazardous materials designed to prevent

or mitigate the uncontrolled release of these materials to the environment.

Credible Events--Postulated events having estimated probabilities of occurrence >10 per

facility year. For natural phenomena, separate probability criteria based on site-specific informa -

tion and facility characteristics should be used.

Design Basis--The set of requirements that bound the design of systems, structures, and com-

ponents within the facility.

Diversity--The existence of multiple components or systems to perform an identified function,

where such components or systems incorporate one or more attributes that are differ ent from

each other.

Effluent--Material that is released into the environment.

Evaluation Guidelines--Dose/exposure values for radiation or hazardous materials that a

safety analysis evaluates against.

Experimental Equipment--Equipment or components installed in or around the facility for the

purpose of research and development, not including regular functioning parts of the fusion facil-

ity itself (i.e., even when such regular functioning parts may be less than fully developed).

Fusion Facility--Any facility that utilizes or supports a magnetically confined plasma in which

fusion reactions take place. It includes the associated facility plant and equipment and any

experimental apparatus used at the facility.

Hazard--A source of danger (i.e., material, energy source, or operation) with the potential to

cause illness, injury, or death to personnel or damage to an operation or to the environment

vii