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|  DOE-HDBK-1131-98
General Employee Radiological Training
Student's Guide
2. Man-made sources of radiation
Man-made sources of radiation, where the radiation is either prod uced or
enhanced by human activities, contribute to the remainder of the annual
average radiation dose (approximately 60 millirem). Man-made sources
include the following:
a. Medical uses such as X -rays and nuclear medicine tests or treatments
b. Tobacco products
c.
Building materials
7
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