The Ranger uranium mine in Kakadu National Park, Australia

With Japan shuttering its nuclear reactors and Europe pulling away from the nuclear power, the world has more uranium than it needs. But that's not stopping some people from betting on the radioactive element in the longer term.

"The industry in general is working through an oversupply situation due largely to the idling of reactors in Japan after the incident at the Fukushima plant," said Jeffrey Donald, a spokesperson for USEC, which supplies uranium to commercial nuclear plants in the U.S. and internationally.