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|  DOE-HDBK-1130-98
Module 1: Radiological Fundamentals
Instructor's Notes
3) Radiation absorbed dose rate = mrad/hr.
Table 1-6
Radiation Units
Roentgen (R)
Rad
Rem
(Radiation Absorbed
(Roentgen Equivalent
Dose)
Man)
Unit for
Unit for measuring
Unit for measuring
measuring
absorbed dose in any
dose equivalence (most
exposure.
material.
commonly used unit).
Defined only
Defined for any
Pertains to human
for effect on
material.
body.
air.
Applies only
Applies to all types of
Applies to all types of
to gamma and
radiation.
radiation.
X-ray
radiation.
Does not relate
Does not take into
Takes into account the
account the potential
energy absorbed (dose)
effects of
effect that different
and the biological
radiation to the
types of radiation have
effect on the body due
human body.
on the body.
to the different types of
radiation.
Equal doses of
different types of
radiation (as measured
in rad) can cause
different levels of
damage to the body
(measured in rem).
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