Approximately 997 out of every 1000 uranium atoms are uranium-238. The remaining 3 atoms are the fissile uranium-235. The uranium-235 atom splits, or fissions, into lighter elements when its nucleus is struck by a neutron. UST U nderground S torage T ank, any underground storage tank or associated piping containing hazardous materials. A method of immobilizing waste that produces a glass-like solid that permanently captures the radioactive materials.
Most industrial solvents are volatile.
Found in some liquid and air waste releases. Employing new techniques to reduce the amount of hazardous and radioactive wastes generated to as low a level as possible. P roject, a planned disposal facility in New Mexico for transuranic and other radioactive wastes.