Further Information
Thorium, from which U-233 is bred, is roughly three to four times more common than uranium.
The decay chain of 233U itself is in the neptunium series.
Uses for uranium-233 include the production of medical isotopes actinium-225 and bismuth-213, low-mass nuclear reactors for space travel applications, use as an isotopic tracer, nuclear weapons research, and reactor fuel research including the thorium fuel cycle.
The radioisotope bismuth-213 is a decay product of uranium-233; it has promise for the treatment of certain types of cancer, including acute myeloid leukemia and cancers of the pancreas, kidneys and other organs.
Read more about this topic: Uranium-233