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Radiological Assessor Training
DOE-HDBK-1141-2001
Student's Guide
design, contamination control procedures, and
protective clothing/equipment.
Plutonium transferred from the initial entry site is
assumed to be translocated to the liver (45%) and
the bone (45). Retention half-life in the liver is 20
yrs and in the bone is 50 yrs, according to
International Commission on Radiological
Protection (ICRP) Publication 30.
Control must be verified by a bioassay program.
Urinalysis is the most common technique, but
fecal analysis and in vivo monitoring may also be
appropriate.
DOE-STD-1121-99, Internal Dosimetry, provides
technical guidance on internal dosimetry
programs, including enhanced workplace
monitoring for instances where there is a
technology shortfall, such as for plutonium. This
standard should be reviewed prior to conducting
assessments of internal dosimetry programs.
The standard also discusses appropriate
evaluation of bioassay results.
D. Monitoring instruments
Portable instruments should be calibrated in
accordance with DOE G441.1-7, Portable
Monitoring Instrument Calibration. DOE-STD-
1128-98 has additional guidance on monitoring
Facilities that deal with unencapsulated plutonium
should have continuously operating effluent
monitors to determine whether or not plutonium is
being released to the environment.
Module 8 - 4


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