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|  DOE-HDBK-1108-2002
Radiological Training for Accelerator Facilities
Student's Guide
Lesson Plan
Notes
5.
Air
Air, dust, and other gases in the accelerator enclosure may be
activated. Typically, the activation products are short-lived
gaseous radionuclides of the elements in the air or particulate,
in the case of dust particles. An example is Oxygen-15 from
Nitrogen-14.
6.
Liquids
Cooling water: used for cooling beamline components
a.
(activation products such as tritium (H-3), beryllium
(Be-7) and possible pipe wear products or erosion of
the pipe surfaces).
Oil in vacuum pumps (beam line components).
b.
Cryogenic fluids: liquid helium and nitrogen are used
c.
frequently to cool components.
7.
Facility-Specific
Facility should cover items that routinely become activated
due to accelerator operation.
8.
Contamination
Materials and activities that could create contamination
concerns.
a. Surface coating: such as paint, oxidation, and rust may
present a contamination problem. Such coatings may be
easily removable and may be present in areas not
commonly accessed, such as beam dump vaults.
16
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