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DOE Standard Guide of Good Practices for Occupational Radiological Protection In Plutonium Facilities
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Confinement Devices cont'd - doe-std-1128-98_ch10308


DOE-STD-1128-98
Hood design and filtration systems should comply with the criteria
established in ERDA 76-21, Nuclear Air Cleaning Handbook (ERDA,
1976); Industrial Ventilation, A Manual of Recommended Practice by
the American Conference of Governmental Industrial Hygienists
(ACGIH, 1988); and ORNL-NSIC-65, Design, Construction, and Testing
of High Efficiency Air Filtration Systems for Nuclear Applications
(ORNL, 1970).
The hood structure should have a smooth, corrosion-resistant inner
surface that is made of or coated with easily cleaned material.
Glove boxes, conveyors, and other enclosures should be designed to
control and minimize the release of radioactive materials during normal
operations and postulated accidents. Noncombustible or fire- and
corrosion-resistant materials should be used in the construction of the
confinement system, including any shielding employed. Fixed modular
construction should be employed wherever possible, using a standardized
attachment system that will permit replacement or relocation of the
contents within the glove-box system with a minimum spread of
contamination. Fire dampers should be provided between glove boxes to
limit the spread of fire. Fire dampers should be tested frequently to
assure proper operation when needed.
The process design should minimize required hands-on operation in
glove boxes and other primary confinement units.
The glove-box design should include sufficient work space to permit
removal of materials and easy personnel access to all normal work areas,
and it should provide for the collection, packaging, storage, and/or
disposal of waste generated by the operation of the glove box.
Consideration should be given to incorporating transfer systems such as a
double door sealed transfer system for removal of plutonium from a
glove box. Types of removal and transfer systems are given in IAEA
Safety Series No. 30 (IAEA, 1981). These types of removal systems are
designed to permit entry and removal of material without breaching the
integrity of the glove box.
Automatic glove-hanging systems are available and should be considered
in the design or modification of glove box systems.
The ease of visibility for activities, accessibility of necessary in-box
controls, and ease of cleanup and waste removal should be considered in
the design of glove boxes. Glove boxes should be designed and
constructed to reduce points of material accumulation.
Equipment should be designed to preclude sharp corners, barbs or
pointed parts, and pinching points that could puncture glove box gloves
or skin. All corners should be rounded and burrs removed.
C-16


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