吃那么一天
Nuclear power plants provide about 17 percent of the world's electricity.Some countries depend more on nuclear power for electricity than others. In France, for instance, about 75 percent of the electricity is generated from nuclear power. There are more than 400 nuclear power plants around the world. To build a nuclear reactor (核反应堆),what you need is some mildly2 enriched uranium(铀). Uranium is a fairly common element on Earth,incorporated3 into the planet during the planet's formation(形成). U-235 is one of the few materials that can undergo4 induced fission(诱发性核裂变). Raising and lowering the control rods(杆,棒条) allow operators to control the rate of the nuclear reaction.When an operator (操作员) wants the uranium core to produce more heat,the rods are raised out of the uranium bundle(捆,束). To create less heat, the rods are lowered into the uranium bundle.The rods can also be lowered completely into the uranium bundle to shut the reactor down in the case of an accident or to change the fuel. The uranium bundleactsasanextremely high-energy source of heat. It heats the water and turns it to steam. The steam drives a steam turbine(汽轮机), which spins5 a generator(发电机) to produce power. Well-constructed nuclear power plants have an important advantage when it comes to electrical power generation——they are extremely clean. Compared with a coalfired power plant, nuclear power plants are a dream come true from an environmental standpoint (立场,观点). Unfortunately, there are significant problems with nuclear power plants. Mining and purifying(提纯) uranium has not, historically, been a very clean process. Improperly func- tioning nuclear power plants can create big problems. The Chernobyl6 disaster is a good example.Spent fuel from nuclear power plants is toxic (有毒的) for centuries, and, as yet, there is no safe, permanent(永久的) storage facility for it.
飞鸟鱼虫菲菲
核电站在运行时不能出半点差池。乌克兰的切尔诺贝利核电站的核泄漏事故就是最好不过的前车之鉴。问题是" 人有失手，马有乱蹄"，世界本身不稳定的特性决定了人必然是有失误的时候。我们可以通过诸多努力将这种情况的出现尽可能地减少或推迟，但是做到绝对杜绝人为失误是不可能的。混沌学说揭示了世界的复杂性和不确定性。根据混沌学说的基本原理，系统内充满了对某一事件未来结果具影响力的诸多不可预测和不可认知的因素。我们对所有安全措施的严守都只能是为我们提供一种近似的而非彻底的安全。核电站自身潜在的高危特性是不能允许:作人员有丝毫失误的，这与世界本身的不确定性是严重背离的，因此也就谕示着核电站隐含了不可避免的危险。 核物质高强度的放射性对人体和环境的毁灭性不用赘论了。核能从经济的角度上讲也并非完全可行。人们不了解的是，建一座核电站相对容易，拆除它却要花费数倍乃至十数倍于建造的费用。拆除核电站要将整座核电站用特殊的工具切割成一块一块的小砖头，然后一块一块地用特殊仪器检测，未发现含有过量核辐射的才可以运走。若发现其含有超量核辐射的则要按核废料处理。 提到核废料，极少有人知道它处理的难度，这也是造成公众对核电站抱无所谓态度的主要原因。核废料不同于废电池，统一收集密闭封存就可以高枕无忧了。核废料中不能被完全用尽的核物质仍具有极强的放射性，且具有残留时间长、毒性剧烈的特点。核废料即使贮存过百万年，其残留物质中的核辐射剂量仍能超过允许剂量的一千万倍以上，这是一般人难以想象和理解的。比起核电站的运转来，世界本身所具有的不稳定特性，必将给核废料的安全贮存带来难以预测、不可避免的破坏。基于此，许多原来率先建造核电站的国家正在考虑停建缓建核电站。国外一些专家也呼吁人类在对核能的使用上要慎之又慎。因为核技术不仅是用于军事上才会威胁到人类安全，核技术本身就是极度危险的。
刘小淼淼淼
许多国家都有自己的核电站，它具有的优势和 缺点。以前建造的核电站，许多国家的不能 为他们的人民和核电的帮助下提供足够的能量 站，我们可以得到足够的精力去做我们喜欢和享受的一切，我们 需要。这也是该国的经济发展是有益的。 但它也有很多缺点，如果地震中消失，其中核 电站在于，将产生巨大的灾难使人们遭受的 预计污染是一个更好的例子，所以我们必须把它 认真做好措施，先进越好，我们可以。 相信随着技术的发展，核电站可以 从人们更好地造福。Many country have their own nuclear power station,which has advantages and disadvantages. Before built the nuclear power stations, many countrys can't provide the enough energy for their people.With the help of nuclear power station,we can get enough energy to do what we like and enjoy everything that we need . It's also benefical to the country's economic development.But it also have many disadvantages,if the earthquake disappear where nuclear power station lie in, will produce great disaster which make people suffered the exepected result.Nuclear contamination is a better example ,so we must take it seriously and Completes the measures in advanced as possible as we can.I believe that with the development of technology ,nuclear power station can benefit from people better.
派大海绵
Nuclear power stations have been spread everywhere.But their safety has caused a heated discussion about their existance. First,I think that nuclear power stations can provide more electricity than the traditional thermal power stations.They cost less non-renewable resources and produce more electricity.Second,they can push the development of science and technology.Because the nuclear power is a new technology,it can develop fast.Last but not least,nuclear power stations can decrease pollution.Because they rarely produce waste gas and water.Nuclear power stations can benefit us more in the future if government can take safer measures to prevent from accidents.翻译：核电站在世界上分布很广。但是它们的安全性引发了一场关于其是否应该存在激烈讨论。 首先，我认为相比传统热电站，核电站可以提供更多的电能。它们消耗更少的不可再生资源，产出更多的电能。第二，它们可以推动科技的发展。因为核能是一项新技术，它可以发展很迅猛。最后，核电站可以减少污染。因为它们几乎不排放废水废气。 如果政府可以采取更安全的措施来防止事故的话，在不久的将来，核电站会让我们受益匪浅。绝对原创，望采纳，谢谢！！
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