While the nuclear materials at the "front end" of the uranium fuel chain are not radioactive wastes per se, they still involve risks -- both toxic chemical, as well as radiological -- during their transport. The WISE Uranium Project (World Information Service on Energy) has documented general uranium transport accidents, as well as transport risks and accidents specifically involving uranium hexafluoride. Miles Goldstick wrote a book in 1991 entitled The Hex Connection: Some Problems and Hazards Associated with the Transportation of Uranium Hexafluoride.