concentrated nuclear fuel

The final straw for the nuclear inspectors was Iran's decision in early February to produce concentrated nuclear fuel at only a few hours notice.

The Iranians said on Wednesday that they plan to triple production of the most concentrated nuclear fuel — the kind that could get them closer to a bomb.

The chain of atoms splitting or burning created by the neutrons will in time consume all the uranium 235 contained in the uranium fuel and will convert some of the remainder to the concentrated nuclear fuel - plutonium.