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Monitoring Program - doe-std-1128-98_ch10104
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DOE Standard Guide of Good Practices for Occupational Radiological Protection In Plutonium Facilities
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Requirements for Special Maintenance - doe-std-1128-98_ch10106


DOE-STD-1128-98
4.3.3.1 Requirements for Routine Operations
As a minimum, personnel who handle or work with unsealed sources of
plutonium should wear coveralls, gloves, and shoe covers. For inspections or
visits, lab coats and shoe covers may be permissible in those same areas.
When contaminated wet areas are to be entered, water-repellent (plastic or
rubber) clothing should be worn. No personal outer clothing should be
permitted under coveralls.
When working with unsealed plutonium sources or in glove boxes, hands
should be protected by a minimum of two barriers, for example, at least one
pair of surgeon's gloves and one pair of glove-box gloves. Where manual
dexterity is not required and the work involves a potential for piercing one or
both layers of rubber gloves, leather gloves should be worn over the
surgeon's gloves. Automated methods should be considered for replacing
routine manual methods that have a high risk of piercing the gloves.
Protective clothing should be removed at the exit to radiologically controlled
areas and personnel monitoring for contamination performed. If for some
reason this is not practical, the movement of personnel should be strictly
controlled from the exit area to a location where protective clothing can be
removed.
4.3.3.2 Requirements for Special Maintenance
For special maintenance work that involves significant quantities of
plutonium, a double barrier concept should be implemented. An example of
minimum requirements for protective clothing is provided below:
-- Two pairs of coveralls (and sometimes a plastic suit)
-- Canvas boots taped to the inner pair of coveralls, with rubber boots over
the canvas boots
-- One pair of surgical gloves taped to the inner coveralls, with a leather,
cotton, or rubber outer pair of gloves
-- Respiratory protective device with hood taped to respirator.
To create a double barrier between the source and all extremities, surgeon
gloves should be worn in addition to the glove-box gloves. In general, black
Neoprene gloves are the standard glove-box glove and the most economical
to use where process conditions do not produce rapid glove deterioration.
However, alpha particles from surface dust layers can induce surface
cracking in black Neoprene. Hypalon 0 is more resistant to surface cracking,
acid deterioration, and ozone effects, and this characteristic will, in many
cases, make Hypalon gloves the most economical, despite their higher unit
cost.
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