The technology for separation of zirconium and hafnium is the key to prepare reactor-grade productions of zirconium and hafnium.
锆铪分离技术是生产核级锆和核级铪的核心技术。
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In the way enrichment works, getting from 20% to bomb-usable 90% enrichment takes a lot less effort even than churning out the initial 3.5% reactor-grade stuff still piling up at Natanz.
A shipment of bomb-grade uranium arrived at a secure facility in Russia on Monday, sent from a research reactor in Poland as part of a race to secure dangerous radioactive material around the world.