A nuclide that can absorb a neutron to form a fissile material. Uranium–238, for example, absorbs a neutron to form uranium–239, which decays to plutonium–239. This is the type of conversion that occurs in a breeder reactor (seenuclear reactor).
Chemical Engineering
A radionuclide that can absorb a neutron to form fissile material. The fissile material used in fast reactors such as uranium-238 is converted into plutonium-239 by the absorption of a neutron to form uranium-238, which then decays to plutonium-239.