Module 102 The Nuclear Fuel Cycle
darker in color. More soluble uranium
compounds are removed from the body
more quickly by normal body functions,
and tend to be lighter in color.
At this stage in the nuclear fuel cycle, the
yellowcake is converted into uranium hexafluoride
(UF6) for enrich ment. This is ac complished by:
Conversion of yellowcake to pure uranium
trioxide (UO3), called "orange oxide" or
"orange salt," by solvent extraction and
follow-up dryin g.
Conversion of UO3 to uranium dioxide
Conversion of UO2 to uranium tetrafluoride
(UF4) by hydrofluorination (addition of
hydrogen fluoride gas). This product is
called "green salt."
Reacting the UF4 with fluorine gas (F2) to
form uranium hexafluoride (UF6), which is
a volatile form ready for enrichment. The
UF6 is a solid at room temperature but
readily become s a gas when heate d above