PART A -THE IM-9E/PD, IM-93/UD,
IM-93A/UD AND IM-147/PD DOSIMETERS
In order to understand the function of dosimeters, you must know their
purpose, characteristics, principles of operation, and total dose
range.
1.
Purpose.
Dosimeters are designed to measure the total dose of Gamma Radiation
received by an individual. They are a group of radiacmeters that
measure the cumulative exposure to short-duration, high-intensity
Gamma Rays. Gamma Radiation is pure energy that travels through space
in a straight line and at the speed of light. Gamma Rays are
invisible rays similar to X-rays. Gamma Rays interact with the human
body and cause damage to tissues and the blood-forming cells. These
effects on the body are a significant concern to the commander. The
commander must know the total dose of nuclear radiation individuals
receive in the units. This will permit the commander to more
effectively employ the command on the nuclear battlefield. The main
source of this nuclear radiation is fallout.
2.
Characteristics.
There are four models of dosimeters: IM-93/UD, IM-93A/UD, IM-147/PD,
and IM-9E/PD.
a. IM-93/UD and IM-93A/UD.
These dosimeters are considered the standard tactical dosimeter.
They are issued on the general basis of two per platoon. The readings
received at this level form the basis for controlling the exposure of
personnel on the nuclear battlefield.
b. IM-147/PD.
This dosimeter is issued to radiological survey and monitoring teams.
It permits the teams to determine when the turn-back dose has been
reached. The survey and monitoring teams will normally receive more
radiation than other soldiers who are not on the team. The total dose
for this team must be carefully controlled. The total dose status of
the team is a matter of interest to the Nuclear, Biological, and
Chemical Center (NBCC). It is one of the measures used by the NBCC in
selecting which unit teams are to perform surveys.
c. IM-9E/PD.
This dosimeter is issued to explosive ordnance disposal (EOD) teams,
alpha teams with a nuclear accident/incident response and
IS0345
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