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External and Internal Radiation Dose Reduction cont'd - hdbk-1130-98_ch10094
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DOE-HDBK-1130-98
Module 4: ALARA Program
Instructor's Notes
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.
(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
EO5 State the pathways
a.
Pathways
through which radioactive
material can enter the body.
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:
This information excludes
1)
Inhalation
exposure from natural
internal sources of
2)
Ingestion
discussed in Unit 305.
3)
Absorption through the skin
4)
Absorption through wounds
47


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