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E. Biological Effects and Risks of Ionizing Radiation
In general, small quantities of radioactive materials are
used at the NIH. Consequently, individuals working at NIH receive
small doses of external ionizing radiation, an average of less
than 5-10 mrem per year. No biological effects are expected
at these low dose levels. |
Risk From Radiation Exposure |
1. |
The American
Cancer Society estimates that 25% of all adults will develop
cancer at some time from all possible causes such as smoking,
drugs, alcohol, and pollutants. |
2. |
If an
individual's cumulative occupational radiation dose is 1000
millirem, the chances of eventually developing cancer during
their lifetime may have increased from 25 % to 25.05% (NCRP
116, p.31). |
3. |
Refer
to the NRC REGULATORY GUIDE 8.29 on "Instruction Concerning
Risks from Occupational Radiation Exposure," and NRC REGULATORY
GUIDE 8.13 on "Instruction Concerning Prenatal Radiation Exposure".
These documents are available from the Radiation Safety Training
Office by calling 496-2255. |
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