Module 6: Radiological Access Controls and Postings
Radiological postings are used to:
Alert personnel to the presence of radiation and
Aid in minimizing personnel dose.
Prevent the spread of contamination. In addition, 10
CFR 835 - Subpart F specifies requirements for
personnel entry controls for HR and VHR Areas.
Areas and materials controlled for radiological
EO3 Identify the colors and
purposes will be designated with a magenta or black
symbol used on radiological
standard three-bladed radiological warning symbol
(trefoil) on a yellow background.
Fixed barriers such as walls, rope, tape, or chain will
designate the boundaries of posted areas. Where
possible, the barriers will be yellow and magenta in
The barriers should be placed to clearly mark the
boundary of the radiological areas.
Entrance points to radiologically controlled areas
should have signs or postings stating the entry
requirements, such as "Personnel Dosimeters, RWP
and Respirator Required."
In some cases, more than one radiological condition
See 10 CFR 835.603.
may be present. The area shall be posted to include
all of the radiological conditions that are present.
In areas of ongoing work activities, the dose rate and
contamination levels (or ranges of each) may be
included in postings.
The posting will be placed where it is clearly visible
Responsibilities of the worker
EO2 Identify the worker's
responsibilities in using
Before entering an area controlled for radiological
Radiological Work Permits.
purposes, read all of the signs. Since radiological
conditions can change, the signs will also be changed
to reflect the new conditions. A sign or posting that
you saw one day may be replaced with a new one the