In a major and welcomed development, Russia announced that it will close its last weapons-grade plutonium production reactor.

一项重大、颇受欢迎的进展是俄罗斯宣布将关闭最后一座武器级钚生产反应堆。

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The reserve tanks at a reactor contain the same grade of water in terms of purity and chemical composition that are normally used in the core.

反应堆的储备箱里储备了与反应堆内同等纯度和化学构成的水。

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An accelerator driven sub critical fast reactor (ADSFR) was used to study the Pu burning of weapons grade.

选取加速器驱动次临界快堆(ADSFR)进行燃烧武器级钚研究。

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On Monday,Iran formally notified the IAEA of its response to the nuclear-fuel swap deal, under which it would ship some low-enriched uranium to Turkey in return for higher grade fuel for a Tehran research reactor.

VOA: standard.2010.05.25

(Sound) Amid loud acclamations of approval, top hardline Iranian cleric, Hojatoleslam Ahmad Khatami warned the West that Tehran will produce its own high-grade uranium for a medical research reactor, if the UN International Atomic Energy Agency refuses to provide the fuel.

VOA: standard.2009.11.28

Fourteen years of no-new-nuke-orders later, uranium mining's drop in popularity came with the post-Cold War decision to buy Soviet weapons and turn them into reactor-grade fuel.

FORBES: Yellowcake Fever

In a major and welcomed development, Russia announced that it will close its last weapons-grade plutonium production reactor.

WHITEHOUSE: Nuclear Security Summit: Presidential Press Conference

That reactor type is not ideal for producing weapons-grade plutonium, but all reactors produce plutonium that could be used in a nuclear explosion.

BBC: Yongbyon restart: North Korea ramps up nuclear tension