星期一，一列装载着核弹级铀材料的专列到达了一处俄罗斯的安全设施。这些核材料来自波兰的一个研究用的反应堆，运送它们，是为了确保世界各地的危险的放射性物质安全的努力的一部分。
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.
美国和俄罗斯签署协议，计划处置68吨武器级放射性钚，将其做为民用核反应堆的燃料。
The United States and Russia signed an agreement to dispose of sixty-eight tons of weapons-grade plutonium. They plan to use the plutonium as fuel for civilian nuclear reactors.
三月，日本福岛的发生了9.0级毁灭性的地震和巨大的海啸，之后该地的核反应堆中的三个处在了“部分熔融”的情况。
And "partial meltdown" was the case for three Japan reactors following the devastating earthquake and tsunami in March.
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。
In a major and welcomed development, Russia announced that it will close its last weapons-grade plutonium production reactor.
因此，当伊朗宣称需要一套工业规模的浓缩装置，而不只是简单运转的电力级核反应堆之时，对该国的诸多担忧应运而生。
Hence the fears over Iran, which claims to need an industrial-scale enrichment plant without having a single working power reactor.
一个星期前发生的9级强震引发的海啸袭击了日本沿海的一座核电站，使其陷于瘫痪。日本正在继续努力冷却该核电站损毁的反应堆和曝露的燃料棒。
Japan is continuing its attempts to cool damaged reactors and exposed fuel rods at the crippled coastal nuclear power plant hit by the tsunami following the magnitude nine earthquake a week ago.
日本在1999年就曾发生过一次4级核事故（又称“东海村核事故”——译注），当时在日本核燃料转换公司（Japan NuclearFuel Conversion）的一个燃料厂内，三名正在为反应堆准备燃料的工人引发了一次链式核反应，使反应堆达到临界状态。
Japan itself had a Level 4 accident in 1999, when three workers preparing fuel for a reactor at a Japan Nuclear Fuel Conversion plant triggered a nuclear chain reaction, called a criticality.
40年的厂房设计承受的最大震级是8.2级，而所有新的反应堆设计承受震级是9级。
The 40-year-old plant was designed to withstand an 8.2 magnitude earthquake. All new reactors are designed to withstand nine.
当地震强度达到8.9级时，核反应堆自动进入关闭状态。
When the earthquake hit with 8.9 the nuclear reactors all went into automatic shutdown.
目前全世界大约有130个使用武器级铀元素的研究反应堆。
There are about130research reactors around the world running on weapons-grade uranium.
目前全世界大约有130个使用 武器级铀元素的研究反应堆。
There are about 130 research reactors around the world running on weapons-grade uranium.
在反应堆从低功率级开始提升以准备热传输系统（HTS）升温的同时，反应堆功率慢速降逻辑于百分之二功率上启动。
The reactor power setback logic initiated at 2 percent power while reactor power was being raised from a lower power level in preparation for Heat Transport System (HTS) warm2up.
在反应堆从低功率级开始提升以准备热传输系统（HTS）升温的同时，反应堆功率慢速降逻辑于百分之二功率上启动。
The reactor power setback logic initiated at 2 percent power while reactor power was being raised from a lower power level in preparation for Heat Transport System (HTS) warm2up.
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