混合堆的这个特点与裂变堆是不同的。
This character of the hybrid reactor is different from the fission reactor.
钚、铯以及锶本身就是有限资源，如果裂变反应堆技术先进到一定程度，它们又会成为燃料。
Plutonium, cesium and strontium are also limited resources, and if fissionreactor technology advances enough, they could become fuel sources themselves.
核反应堆的工作原理和其他的发电站很相似，不过它们并不是使用煤炭或煤气来生成热量，而是利用核裂变反应。
Nuclear reactors work in a similar way to other power plants, but instead of using coal or gas to generate heat, they use nuclear fission reactions.
燃料棒虽然停止工作，但仍然非常炙热，而且裂变反应生成的多种副产物也会产生很多热量，这些热量一直维持在反应堆的核心。
That's due to the heat that remains in the nuclear core, both from the recently-disabled but still-hot fuel rods and from the various byproducts of the fission process.
任何突然出现的过量中子数会加速裂变反应，增加反应堆能量输出。
Any sudden excess of neutrons will accelerate the fission reaction and increase the reactor's power output.
一座裂变反应堆需要在可控的核裂变中运转。
A fission reactor works by maintaining a controlled nuclear chain reaction.
在福岛核电厂的反应堆中，正常情况下控制棒本是用来停止裂变反应的，但现在它们已经失去这种效能了。
In Fukushima's reactors, the control rods were used to shut down the fission reaction, which they did correctly, but they've exhausted their use now.
尽管核裂变反应堆可能重归流行，但是现在很少有人相信核聚变。
Few believe in fusion now, though uranium-powered fission reactors may be coming back into fashion.
一旦反应堆的控制杆置于核燃料棒的中间了，我们应该怎么将裂变减慢到我们可控制的程度呢？
Once the reactor's control rods are between sections of fuel rods, how is fission slowed to where it is controllable?
一个裂变反应很像是一个摆满积木游戏的桌子，每一个积木堆和另一个堆相邻。
A fission reaction is a lot like a table filled with Jenga games, each stack of blocks standing close to another stack.
所有的核反应堆依靠的是核裂变—1930年发现的一种物理过程。
All nuclear reactors rely on nuclearfission, a process that was discovered in the 1930s.
用于和平建设目的的核反应堆所需要的铀浓缩与后处理设施同样可容易地用于制造核武器所需的裂变材料。
It's true that the nuclear enrichment and reprocessing facilities used to produce fuel for peaceful reactors can just as easily be used to make fissile material for bombs.
鼓风机将氦气吹过反应堆，经过核裂变释放出大量能量的小球，加热了氦。
Blowers move helium gas through the reactor and over the pebbles, where nuclear fission releases large amounts of energy, heating up the helium.
很多美国人都担心，关注着美国快速老化的核电站，很多都已经超过了反应堆当初的设计使用寿命，但仍在通过铀裂变发电。
Most American worries focused on the integrity of our nation's rapidly aging nuclear power plants, many of which are still churning through uranium long past the reactors' original expected lifetimes.
日本有几种不同类型的裂变反应堆，但我们将焦点主要集中在发生重大事故的福岛第一核电厂。
There are several types of nuclear fission reactors in Japan, but we're going to focus on the Fukushima Naiishi plant, probably the most hard-hit facility in the country.
整个国家有超过140个安全级别变化的核反应堆，许多分析家认为，一些核反应堆裂变是必然的趋势。
But with more than 140 nuclear reactors of varying levels of security throughout the country, many analysts think it's a near-certainty that some has slipped through the cracks.
铀235——反应堆中的燃料——经过核裂变。
Uranium 235 — the fuel inside a nuclear reactor — undergoes nuclear fission.
这种再处理工艺，或甚至快速中子反应堆不使用水来缓和裂变，及比他们消耗量创造更多的燃料，仍是一个遥远的前景。
Such reprocessing-or even fast-neutron reactors that don't use water to moderate fission and can potentially create more fuel than they consume-remain a distant prospect.
但是约有百分之五的反应堆废料是高放射性裂变产物，包括钚和其他锕系元素。
But roughly 5 percent of reactor waste is highly radioactive fission products, including plutonium and other actinides.
从19世纪70年代投入运行以来，日本福岛第一核电站利用六个沸水堆，通过铀核裂变来产生热能。
In operation since the early 1970s, Japan's Fukushima Daiichi nuclear plant USES six boiling water reactors, which rely on uranium nuclear fission to generate heat.
钚是在核裂变过程中产生的，所以在所有的反应堆中都存在---燃料在反应堆内烧的时间越长，产生的钚就越多，最高可以到1%。
Plutonium is produced during nuclear fission, so is present in all reactor cores - the longer the fuel has been there, the more plutonium will be present, up to about 1%.
核电站的核反应堆中，核裂变会产生高速移动的中子，通常是用水去阻隔及控制中子的移动速度。
Fast-moving neutrons are produced by fission reaction in a nuclear reactor. Water is commonly used to moderate and control the speed of neutrons.
聚变-裂变混合堆可以为压水堆或快堆提供充足的核燃料。
The hybrid breeders can provide plenty of fissile material for PWR or FBR.
因此，在中子输运计算中，必须考虑组件燃耗对堆芯的裂变中子源参数的影响。
So the impact of fuel assemblies burn-up on core fission neutron source parameters shall be considered in the neutron transportation calculation.
在快裂变反应堆的临界问题和超临界系统动力学过程的分析中，几何曲率有重要的应用价值。
The geometric buckling is of great value in application to criticality problem and analysis of dynamic process of supercritical system in fast fission reactor.
反应堆燃料元件的裂变气体释放率测量是辐照后检验的一项重要内容，它对于评价燃料元件的性能起着重要作用。
Fission gas release measurement of reactor fuel rods is one of the main issues of post-irradiation examination, which plays a key role to the evaluation of fuel performance.
反应堆燃料元件的裂变气体释放率测量是辐照后检验的一项重要内容，它对于评价燃料元件的性能起着重要作用。
Fission gas release measurement of reactor fuel rods is one of the main issues of post-irradiation examination, which plays a key role to the evaluation of fuel performance.
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