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Enclosures (as primary confinement) cont'd - hdbk1132990029
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Design Considerations - index
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Secondary Confinement cont'd


DOE-HDBK-1132-99
Gloves should be designed to allow replacement without losing
contamination control and with minimum exposure to the
operator.
When gloves are not in place, a noncombustible shield or cover
for each glove port should be provided.
Exhaust air filters to minimize contamination of ductwork.
Ease of cleaning (radius corners, smooth interior and exterior surfaces,
minimal protuberances, and accessibility of all parts).
Specific coatings for boxes containing halides to permit long life and
ease of decontamination.
Adequate interior illumination (from fixtures mounted on the exterior
where feasible).
Connections for service lines, conduits, instrument leads, drains, and
ductwork.
Pressure differential monitors and heat detection.
Fire barriers and filter installation.
Sample removal ports for filter testing.
Consideration should be given to incorporating transfer systems (such as
double-door, sealed transfer systems or chain conveyors) for removal of
hazardous material from a glovebox. Various types of removal and transfer
systems are discussed in International Atomic Energy Agency (IAEA) Safety
Series No. 30. These systems are designed to allow entry and removal of
material without breaching the integrity of the glovebox. (See ERDA 76-21,
Nuclear Air Cleaning Handbook, for additional information.)
1.1.4
Secondary Confinement. The secondary confinement system consists of
confinement barriers and associated ventilation systems that confine any
potential release of hazardous material from primary confinement. For example,
when gloveboxes provide primary confinement for radioactive or hazardous
I-14


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