国立大学校长Dmytro Melnychuk说：“锶- 90、钚还有镅- 241都是极易通过大火的高温向大气层上迁移和散播的。”
Dmytro Melnychuk, rector of the national university, said: "Strontium-90, plutonium, and americium-241 are all extremely susceptible to upward atmospheric migration and dispersal via heat from fires."
共发生过18起有案可查的高纯度浓缩铀或钚失窃或流失案例，也许还有其他尚未发现的此类案例。
There have been 18 documented cases of theft or loss of highly enriched uranium or plutonium, and perhaps others not yet discovered.
有些国家正在清除其存储的可用于制造核武的高浓缩铀和钚，有些国家正在降低核反应堆扩散的风险，还有一些国家将在会议上签署协议并支持国际原子能机构的工作。
Some are getting rid of their stocks of highly enriched uranium or plutonium, both used in bombs. Others are lowering the risk of proliferation from reactors.
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