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Cell sensitivity - hdbk-1130-98_ch10072


DOE-HDBK-1130-98
Module 2 Biological Effects
Instructor's Notes
a.
Tobacco products (total average dose ~1300 mrem/yr
for smokers)
b.
Medical radiation sources (total average dose ~ 54
mrem/yr)
1) X rays (total average dose ~ 40mrem/yr)
a) X rays are similar to gamma rays; however, they
originate outside the nucleus.
b) A typical radiation dose from a chest
X ray is about 10
mrem.
2)
Diagnosis and therapy (total average dose ~14 mrem/yr)
In addition to X rays, radioactive materials and
radioactive sources are used in medicine for diagnosis
and therapy.
c. Building materials (total average dose ~7 mrem/yr)
Discuss: It has been more
d.
Other minor contributors
than 20 years since
atmospheric testing has been
Other contributors to dose include consumer products,
conducted.
industrial sources, and atmospheric testing of nuclear
weapons.
EO2 Identify the average
3.
Average annual dose
annual dose to the general
population from natural
The average annual total effective dose equivalent to the
general population (non-smokers) from naturally
background and manmade
occurring and manmade sources is about 360 mrem.
sources of radiation.
B.
Effects of Radiation on Cells
The human body is made up of many organ systems. Each
system is made up of tissues. Specialized cells make up
tissues. Ionizing radiation can potentially affect the normal
function of cells.
23


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