But this toxin naturally dissolves after around eight days, meaning that the long term threat of radiation would come from other substances, such as cesium, which has already been detected around Fukushima, and plutonium, which poses the greatest danger if the nuclear fuel rods inside the reactors melt.
基于1个网页-相关网页
trace uranium and plutonium 痕量铀与钚
fission of uranium and plutonium 铀钚裂变
plutonium and power reactor 产钚发电两用反应堆
It remains unclear what is happening with the Number-3 reactor, which is fueled by a mix of uranium and plutonium.
现在还不清楚3号反应堆发生了什么情况，3号反应堆的燃料是混合的铀和钚。
Uranium and plutonium are most likely to find their way into weapons via the enrichment and reprocessing of fuel for nuclear power plants.
铀和钚很可能通过核电厂燃料的浓缩和再加工而流向武器制造。
Only three fissile materials are known at present, there being U-233, U-235, and plutonium.
目前已知有三种裂变材料，它们是铀233，铀235，以及钚。
The United States and Russia signed an agreement to dispose of sixty-eight tons of weapons-grade plutonium.
VOA: special.2010.04.17
North Korea announced Tuesday it is leaving the Chinese-sponsored six-party talks on its nuclear program and will restart its plutonium facility at Yongbyon in response to a U.N.Security Council statement condemning its April 5 launch of a long-range ballistic missile.
VOA: standard.2009.04.15
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