The study on structure of critically safe multistage mixer-settler for the extraction process of high enriched uranium and plutonium has been completed.

为了可靠地进行高加浓铀和钚的萃取过程，研究了一种结构简单的临界安全的混合澄清槽。

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It called on states with reactors burning high-enriched uranium to switch to the low-enriched sort.

呼吁以高浓缩铀作为核反应堆燃料的国家改用低浓缩铀。

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Or it could be used secretly with more sophisticated machines quickly to turn Iran's legal stockpile of low-enriched uranium into high-enriched uranium for weapons, for example if Iran were to withdraw from the Nuclear Non-Proliferation Treaty.

ECONOMIST: Iran's nuclear programme

It called on states with reactors burning high-enriched uranium to switch to the low-enriched sort.

ECONOMIST: Disarmament and counter-proliferation

But the fear is that the same centrifuges could be reconfigured to make high-enriched uranium for nuclear weapons.

ECONOMIST: Iran's nuclear programme