Yes, thorium was used as a fertile material in nuclear reactors.
Today any thorium reactor exist in USA.
Uranium, plutonium or thorium (for fission reactors, by far the most common type).
Thorium is a fertile material for nuclear power reactors. But at a long therm is non-renewable.
Thorium will be probable in the future very important as fertile material in nuclear breeder power reactors.
Not as fuel, but it can be used in breeder reactors as breeding material to make fissile Uranium-233.
There may be Radium, Thorium, Uranium or even Plutonium which can be used in nuclear reactors.
Uranium, and plutonium. (And, to a lessor degree, thorium.)
Thorium is and can be used as a fuel in nuclear reactors. It just happens to be not fissile, so it needs a neutron flux to create Uranium-233, which is fissile. There are pros and cons of using Thorium. For more information, please see the Related Link below.
Only India has nuclear power reactors with thorium in operation: Kaiga, Rajasthan, Kaprakar. Bravo Indians, all before !
Thorium is a fertile material for nuclear power reactors. But at a long therm is non-renewable.
Thorium: natural chemical element, metal, solid, radioactive, actinoids family, period 7, atomic number 90, used in breeder reactors, etc.