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|  DOE-HDBK-1130-98
Module 1: Radiological Fundamentals
Instructor's Notes
b. Range
1) Because of the lack of a charge, neutrons have a
relatively high penetrating ability and are difficult to
stop.
2) The range in air is very far. Like gamma rays, they
can easily travel several hundred feet in air.
c. Shielding
Neutron radiation is best shielded by materials with a high
hydrogen content such as water, concrete, or plastic.
d. Biological hazards
Neutrons are a whole body hazard due to their high
penetrating ability.
e.
Sources
(Insert facility-specific information.)
Table 1-5
Neutrons
Physical
No charge.
Characteristic
Has mass.
s
Range in air is very far.
Easily can go several hundred feet.
Range
High penetrating power due to lack of charge
(difficult to stop).
Water.
Concrete.
Shielding
Plastic (high hydrogen content).
Whole body exposure.
The hazard is generally external.
Hazard
Insert facility-specific information.
Sources
14
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