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Radiological Safety Training for Plutonium Facilities
DOEHDBK11452001
Instructor's Guide
Indirect measurements
Bioassays are used to determine internal
uptakes of plutonium. Urine and/or fecal
samples are collected, reduced chemically,
and counted for the plutonium content.
Baseline bioassays are performed prior to
beginning a new job to find out if the worker
already has incorporated radionuclides.
Termination bioassays are performed to
document if any radionuclides have been
incorporated during the work assignment
that is completed.
Routine bioassays are performed to verify
the effectiveness of workplace controls and
to identify workers who may have had an
intake, whereas non-routine bioassays are
done after a suspected intake of plutonium
is identified. Baseline bioassays are
performed before a worker begins a new job
to find out if he has a deposition of
plutonium. Termination bioassays are
performed when a worker stops work or
leaves his job to find out if he has a
deposition of plutonium and if so, to
calculate his dose.
Soluble plutonium retained in the body is
excreted mainly through the urine.
Following an incident, fecal sampling is
done. These samples are more sensitive as
to intake, but less of a quantitative indicator
of plutonium uptake.
VIII.
Response to abnormal conditions
A. Unexpected adverse situations
To properly deal with unexpected adverse
situations in a plutonium facility, a well-
developed program and trained personnel
should be in place.
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