 Since 2009 the in-situ leach (ISL) operations of Kazakhstan have been producing the largest share of world uranium.The largest conventional uranium mines are Cigar Lake and McArthur River (Canada); Ranger and Olympic Dam (Australia); Krasnokamensk (Russia) and Rossing (Namibia).The largest uranium producers are Cameco, Rio Tinto, Areva, KazAtomProm and ARMZ-TVEL.