huge potential, page-8

Known Recoverable Resources of Uranium 2011 (5.3 million metric tonnes)
http://www.world-nuclear.org/info/Nuclear-Fuel-Cycle/Uranium-Resources/Supply-of-Uranium/#.UdoKkL7D9Yc
World Nuclear Association

(metric tonnes)
[% of world]
Australia
(1,661,000)
[31%]
Kazakhstan
(629,000)
[12%]
Russia
(487,200)
[9%]
Canada
(468,700)
[9%]
Niger
(421,000)
[8%]
South Africa
(279,100)
[5%]
Brazil
(276,700)
[5%]
Namibia
(261,000)
[5%]
USA
(207,400)
[4%]
China
(166,100)
[3%]
Ukraine
(119,600)
[2%]
Uzbekistan
(96,200)
[2%]
Mongolia
(55,700)
[1%]
Jordan
(33,800)
[1%]
Other
(164,000)
[3%]
World total
5,327,200 metric tonnes