Structural features of a facility, containers, or equipment that
are used to establish the physical integrity of an area or items
(including safeguards equipment or data) and to maintain the
continuity of knowledge of the area or items by preventing
undetected access to, or movement of, nuclear or other material, or
interference with the items. Examples are the walls of a storage
room or of a storage pool, transport flasks and storage containers.
The continuing integrity of the containment itself is usually
assured by seals or surveillance measures (especially for
containment penetrations such as doors, vessel lids and water
surfaces) and by periodic examination of the containment during
inspection.
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