There have been several accidents involving uranium hexafluoride in the United States, including one in which 32 workers were exposed to a cloud of and its reaction products in 1986 at a Gore, Oklahoma, commercial uranium conversion facility. One person died; while a few workers with higher exposure experienced short-term kidney damage (e.g., protein in the urine), none of them showed lasting damage from the exposure to uranium. The U.S. government has been converting depleted to solid uranium oxides for use or disposal. Such disposal of the entire D inventory could cost anywhere from million to million.