Thorium is a naturally occurring chemical element with the symbol Th and atomic number 90. It is a slightly radioactive metal, found in the Earth's crust in greater quantities than uranium.
It forms naturally during geological processes and is mainly extracted from minerals such as monazite. Thorium-232 is the most abundant, stable, and widely used isotope.
Thorium is being studied as a promising alternative to uranium in certain types of nuclear reactors. It can be used in molten salt or fast neutron reactors, where it transforms into a fissile isotope (i.e., an atom capable
of splitting and releasing energy when struck by a neutron, thereby producing heat and electricity). Outside the nuclear field, thorium has also been used in heat-resistant metal alloys and, historically, in certain types of incandescent lamp.
Orano Med, a subsidiary of the Orano group specializing in nuclear medicine, uses thorium-232, an isotope derived from former mining operations, to produce lead-212, an isotope used in targeted alpha therapy - an innovative therapy for treating certain cancers. Thorium-232 is converted into thorium-228, then into lead-212 in laboratories in France and the United States, before being incorporated into lead-212 radiolabeled drugs supplied
to hospitals.
This end-to-end chain enables Orano Med to provide a reliable product supply and position itself as a world leader in targeted alpha therapy.