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|  DOE-HDBK-1113-98
Module 101 Properties of Uranium
Lesson Plan
Instructor's Notes
2.
Liquid
Provide a facility specific
Uranium melts at 1133C, so molten uranium is
example of uranium in
unusual, except in a foundry. It has often been
liquid form.
observed that the radioactivity appears to increase
when uranium is melted. This is because radioactive
decay products, such as radium and thorium, float to
the surface. The density of radium is 5 g/cm3,
compared with 19 g/cm3 for uranium; therefore,
radium floats in molten uranium.
Uranium in contact or solution with water is
common. The primary hazards associated with a
uranium solution are criticality (for enriched
uranium) and spills. Water decreases the quantity of
enriched uranium required for criticality. This topic
will be discussed in Module 105 Criticality Safety.
3.
Airborne Powder
Provide a facility specific
example of uranium in
A spill of any radioactive solution is a concern. As
the solution evaporates, it leaves behind a
airborne powder form.
radioactive residue, or powder, that can easily
become airborne. Airborne uranium may be inhaled
and absorbed into the bloodstream through the
lungs.
6
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