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|  Radiological Assessor Training
DOE-HDBK-1141-2001
Instructor's Guide
One or more of the following methods
Show OT 2.18.
shall be used to ensure control:
Signs and barricades
Control devices on entrances
Conspicuous visual and/or audible
alarms
Locked entrance ways
Administrative controls
Show OT 2.19.
"No control(s) shall be installed at any
radiological area exit that would prevent
rapid evacuation of personnel under
emergency conditions."
2. High Radiation Areas
Show OT 2.20.
A High Radiation Area is an area where
radiation levels exist such that an
individual could exceed a deep dose
equivalent to the whole body of 0.1 rem in
any one hour at 30 centimeters from the
source or from any surface that the
radiation penetrates.
If an individual receive a deep dose
equivalent exceeding 1.0 rem in an hour
(at 30 cm), a High Radiation Area shall
have one or more of the following:
A control device that prevents entry to
the area when high radiation levels
exist or that, upon entry, causes the
radiation level to be reduced below
that level that defines a High Radiation
Area.
A device that functions automatically to
prevent use or operation of the
radiation source or field while
individuals are in the area.
Module 2 - 13
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