Monitoring instruments - DOE-HDBK-1141-2001

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