The study calculates that the plant has facilitated about six tonnes of weapon-grade or 90% enriched uranium.

该研究算出，这一工厂已经生产了大约6吨军用的或90%浓度的浓缩铀。

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The study calculates that China's Lanzhou plant, operating continuously at full capacity up to 1980, would have facilitated about six tonnes of weapon-grade or 90% enriched uranium.

该研究算出：在满负荷运转情况下，截止到1980年，中国的兰州厂生产了大约6吨军用的或90%浓度的浓缩铀。

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The probability to produce the weapon-grade plutonium clandestinely in some countries were discussed, some possible ways to detect the clandestine production activities have been given.

讨论了选择秘密生产武器级钚的可能性，给出了探测秘密生产活动的几种可能途径；

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The MOX facility will blend surplus weapon-grade plutonium with depleted uranium oxide to make mixed oxide fuel for use in existing nuclear power plants.

FORBES: Japanese Official: Most Dangerous Reactor May Have Ruptured, Leaking Radiation

Weapon-grade fuel needs to be enriched to around 90% purity.

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

"The chairman concurs Iran has enough low-enriched to produce a nuclear weapon, but it's important to note it's low-grade, and to enrich it would take time, " Kirby said.

CNN: U.S.: Iran has material for nuclear bomb but still 'not close'