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|  DOE-HDBK-1130-98
c. Proper uses of shielding
Shielding reduces the amount of radiation dose to the worker. Different materials
shield a worker from the different types of radiation.
1)
Take advantage of permanent shielding, such as non-radiological
equipment/structures.
2)
Use shielded containments when available.
3)
Wear safety glasses/goggles to protect your eyes from beta radiation, when
applicable.
4)
Temporary shielding (e.g., lead or concrete blocks) can only be installed when
proper procedures are used.
5)
Temporary shielding will be marked or labeled with wording such as "Temporary
Shielding - Do Not Remove Without Permission from Radiological Control."
6)
Once temporary shielding is installed, it cannot be removed without proper
authorization.
When evaluating the use of shielding, the estimated dose saved is compared
to the estimated dose incurred during shield installation and removal.
7)
(Insert facility-specific information.)
d. Source Reduction
Source reduction is another method of reducing radiation doses. Source reduction
often involves procedures such as flushing radioactive systems, decontamination, and
removal of contaminated items. This is done to reduce the amount of radioactive
materials present in/on a system because these materials can add to radiation levels in
an area.
2.
Internal radiation dose reduction
a.
Pathways
Internal dose is a result of radioactive materials being taken into the body.
Radioactive material can enter the body through one or more of the following
pathways:
1)
Inhalation
2)
Ingestion
3)
Absorption through the skin
37
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