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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.
6
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


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