这一过程释放出大量能量和更多的中子，于是继续将别的铀原子一分为二，引发连锁反应。
The process releases a lot of energy and more neutrons, which go on to split other uranium atoms, triggering a chain reaction.
石墨是很好的减速剂，减慢中子并且让它们的反应保持在一个适当的温度范围内。
Graphite is a great moderator, slowing down the neutrons and keeping their reaction in the proper temperature range.
这些控制棒，由能够吸收中子的物质——硼制成，它吸收多余的中子，使链式反应停止。
These rods, made of neutron-absorbing materials such as boron, mop up excess neutrons and quench the chain reaction.
因此，除非这些中子能够被充分减速，否则链式反应会停止。
As a result, the chain reaction will Peter out unless the neutrons can be slowed down sufficiently.
铀或钚的同位素被称为裂变材料，即我们可以利用自由中子去轰击它们来产生裂变反应。
The uranium or plutonium isotopes are referred to as "fissile," which means we can use them to induce fission by bombarding them with free neutrons.
所以，理解了这些事情，它们能够将中子从反应堆中除去，你就在能够设计一个核心的位置了。
So with an appreciation for the kinds of things that can take neutrons away from the system you then are in a position to design a core.
产生的新组成包括两个新原子核(副产物)、一些光子(伽马射线)以及更多的自由中子，它们是参与核裂变反应并产生能量的关键。
Those new pieces include two new nuclei (byproducts), some photons (gamma rays), but also some more free neutrons, which is the key that makes nuclear fission a good candidate to generate energy.
这些混合物发生反应后就形成氦元素，并同时生成更多的中子与大批量的能量。
These react to form helium, yet more neutrons and a whole lot more energy.
在核反应堆芯，自由中子连续撞击轴原子，从而产生大量热量。
In the core, uranium atoms are bombarded with free neutrons producing immense heat.
水源除用于冷却燃料外(也由此生成蒸汽)，还起到调节介质的作用，它能使中子减速，并使核反应持续进行。
Besides cooling the fuel (and thus producing the steam) the water also ACTS as a moderator, slowing down the neutrons and keeping the reaction going.
纯氘反应也会产生中子，虽然最多只能释放出三分之一的聚变能。
Pure deuterium reactions also produce neutrons, though only about 1/3 of the fusion energy is released as such.
最后得到的是一群的热化的，中子，那也有一定的，从反应堆中泄露的可能性。
Ultimately ending up with a group of thermalized neutrons that also have a certain probability of leakage from the reactor.
所以，如果你的反应堆是在几米的范围里,那是中子的长度范围，它看起来像是一个热中子，那大约是十分之一米。
So if you're reactor is on the scale of meters the neutron length scales, it looks like a thermal neutron, is in the order of a tenth of a meter.
所以，如果你理解这个图表，你会开始，了解到在反应堆核心的中子周期。
So if you understand this chart you will begin to appreciate the life of a neutron in the reactor core.
大约80百分之的聚变能以中子的形式释放出来，所以这个核反应不是很大（或有用）对于一个星际飞船。
About 80 percent of the fusion energy released is in the form of those neutrons, so the reaction isn't very healthy (or useful) for a starship.
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.
这主要对于一个临界反应堆的中子平衡，它考虑了所有的这些现象。
And it's essentially a neutron balance for a critical reactor and it does consider all of these phenomena.
我们有高速中子反应堆，那使用一个液态金属，以钠或者铅的形式。
We have fast reactors which use a liquid metal in the form of sodium or perhaps lead.
这是因为他们将完成与质子和中子的融合，而其融合采取方式是让核反应更容易快捷地发生。
This is because they would have combined with protons and neutrons in ways that made it easier and faster for other nuclear reactions to occur.
这也就是PCR呈现负值会出现的情况。因为PCR负值的反应堆会自动限制穿越反应堆的中子数，所以会在短暂的能量增加后减慢增长速度。
This is where having a negative PCR is handy, because it automatically limits the number of neutrons flying through the reactor, so it damps itself down after a momentary power increase.
在通常的全动力应用下，内核里中子的产量是稳定的（保持一个数量不变），反应器处于临界状态。
During normal, full-power operation, the neutron population in a core is stable (remains the same) and the reactor is in a critical state.
这些中子从核反应堆中产生，在减速剂的作用下减到难以置信的低速。
The neutrons are created in a fission reactor, and slowed to incredibly low speeds by materials known as moderators.
新型的反应堆被设计出来，包括由钚提供能量，液态钠参与冷却的快中子增殖反应堆。
New types of reactors were designed, including the Fast Breeder reactor powered by plutonium and cooled by liquid sodium.
敦雷曾是英国研发快中子增殖反应堆——目的在于消耗燃料的同时生成新燃料——的中心，直到1988年该项目取消。
Dounreay was the UK centre for developing fast breeder reactors, which aimed to create new fuel as they consumed it, until the programme was cancelled in 1988.
核反应可以通过使用由吸附中子的材料构成的棒条，比如硼，来减慢裂变过程，从而控制其反应。
The nuclear reaction can be controlled utilizing rods made of neutron-absorbing material, such as boron, essentially shutting down the fission process.
敦雷的原料不是废料，而是来自快中子增殖反应堆计划的需要适当管理的原材料。
The material at Dounreay is not waste, it is a nuclear material from the fast breeder reactor programme that requires appropriate management.
在核反应堆中，保持合理数量的中子存在至关重要。
In a nuclear reactor, it is essential that just the right number of neutrons are present.
冷却水被泵送到反应堆中心的时候，这些溶解下来的金属离子受到中子的轰炸，导致其中有一部分离子也具有了放射性。
When the water is pumped through the reactor's core, these ions are bombarded by neutrons and some of them become radioactive.
冷却水被泵送到反应堆中心的时候，这些溶解下来的金属离子受到中子的轰炸，导致其中有一部分离子也具有了放射性。
When the water is pumped through the reactor's core, these ions are bombarded by neutrons and some of them become radioactive.
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