This is the stuff that atomic bombs and nuclear reactor fuel are made from.

FORBES: Energy's Latest Battleground: Fracking For Uranium

U.S. and United Nations officials have documented what they describe as serious limitations in Iran's ability to quickly and efficiently produce the enriched uranium required to either fuel a nuclear power reactor or to build an atomic weapon.

WSJ: North Korea Nuclear Find Raises Fears It Will Share With Iran

With plutonium no longer needed for use in the world's abandoned fast breeder reactor programmes and nuclear powers getting rid of their atomic weapons, large stockpiles of the highly toxic plutonium metal are starting to build up.

BBC: More suspect nuclear fuel found

Russia's Ministry of Atomic Energy, Minatom, is keen to build a new nuclear reactor at Seversk, though it does not have the money at present.

ECONOMIST: The time-bombs of Tomsk