Shadowing Practice: Nuclear Energy Explained: How does it work? 1/3 - Learn English Speaking with Video
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46 משפטים
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1
Have you ever been in an argument about nuclear power?
2
We have, and we found it frustrating and confusing, so let’s try and get to grips with this topic.
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It all started in the 1940s.
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After the shock and horror of the war and the use of the atomic bomb, nuclear energy promised to be a peaceful spin-off of the new technology, helping the world get back on its feet.
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Everyone’s imagination was running wild.
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Would electricity become free?
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Could nuclear power help settle the Antarctic?
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Would there be nuclear-powered cars, planes, or houses?
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It seemed that this was just a few years of hard work away.
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One thing was certain: the future was atomic.
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Just a few years later, there was a sort of atomic age hangover; as it turned out, nuclear power was very complicated and very expensive.
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Turning physics into engineering was easy on paper, but hard in real life.
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Also, private companies thought that nuclear power was much too risky as an investment; most of them would much rather stick with gas, coal, and oil.
14
But there were many people who didn’t just want to abandon the promise of the atomic age; an exciting new technology, the prospect of enormously cheap electricity, the prospect of being independent of oil and gas imports, and, in some cases, a secret desire to possess atomic weapons provided a strong motivation to keep going.
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Nuclear power’s finest hour finally came in the early 1970s, when war in the Middle East caused oil prices to skyrocket worldwide.
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Now, commercial interest and investment picked up at a dazzling pace.
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More than half of all the nuclear reactors in the world were built between 1970 and 1985.
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But which type of reactor to build, given how many different types there were to choose from?
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A surprising underdog candidate won the day: the light water reactor.
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It wasn’t very innovative, and it wasn’t too popular with scientists, but it had some decisive advantages: it was there, it worked, and it wasn’t terribly expensive.
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So, what does a light water reactor do?
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Well, the basic principle is shockingly simple: it heats up water using an artificial chain reaction.
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Nuclear fission releases several million times more energy than any chemical reaction could.
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Really heavy elements on the brink of stability, like uranium-235, get bombarded with neutrons.
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The neutron is absorbed, but the result is unstable.
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Most of the time, it immediately splits into fast-moving lighter elements, some additional free neutrons, and energy in the form of radiation.
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The radiation heats the surrounding water, while the neutrons repeat the process with other atoms, releasing more neutrons and radiation in a closely controlled chain reaction.
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Very different from the fast, destructive runaway reaction in an atomic bomb.
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In our light water reactor, a moderator is needed to control the neutrons’ energy.
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Simple, ordinary water does the job, which is very practical, since water’s used to drive the turbines anyway.
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The light water reactor became prevalent because it’s simple and cheap.
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However, it’s neither the safest, most efficient, nor technically elegant nuclear reactor.
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The renewed nuclear hype lasted barely a decade, though; in 1979, the Three Mile Island nuclear plant in Pennsylvania barely escaped a catastrophe when its core melted.
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In 1986, the Chernobyl catastrophe directly threatened Central Europe with a radioactive cloud, and in 2011 the drawn-out Fukushima disaster sparked new discussions and concerns.
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While in the 1980s 218 new nuclear power reactors went live, their number and nuclear’s global share of electricity production has stagnated since the end of the ’80s.
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So what’s the situation today?
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Today, nuclear energy meets around 10% of the world’s energy demand.
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There are about 439 nuclear reactors in 31 countries.
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About 70 new reactors are under construction in 2015, most of them in countries which are growing quickly.
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All in all, 116 new reactors are planned worldwide.
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Most nuclear reactors were built more than 25 years ago with pretty old technology.
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More than 80% are various types of light water reactor.
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Today, many countries are faced with a choice: the expensive replacement of the aging reactors, possibly with more efficient, but less tested models, or a move away from nuclear power towards newer or older technology with different cost and environmental impacts.
44
So, should we use nuclear energy?
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The pro and contra arguments will be presented here next week.
46
Subscribe, and then you won’t miss it!
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About This Lesson
In this lesson, you will delve into the intriguing topic of nuclear energy, exploring its history, technology, and societal implications as presented in the video titled "Nuclear Energy Explained: How does it work?". As you listen to the transcript, you will practice your English speaking skills through a method known as shadowspeak. This technique involves mimicking the speech patterns, tone, and pronunciation of the narrator in order to enhance your fluency and comprehension. By engaging with this content, not only will you gain insights into nuclear power, but you'll also improve your ability to articulate complex ideas in English.
Key Vocabulary & Phrases
- Nuclear Energy: Power generated from nuclear reactions.
- Fission: The process of splitting atoms to release energy.
- Chain Reaction: A series of reactions where the product of one reaction initiates further reactions.
- Reactor: A device used to initiate and control a sustained nuclear reaction.
- Moderator: Material used in a reactor to slow down neutrons to sustain the fission process.
- Radiation: Energy emitted in the form of particles or electromagnetic waves.
- Safety Concerns: Issues related to potential hazards and risks associated with nuclear energy.
Practice Tips
To maximize your learning experience, adopt a shadow speech approach while practicing. Here are some tailored tips for effective shadowing with this video:
- Start with Active Listening: Before attempting to shadow, listen carefully to the entire video to understand its context and the speaker's pacing.
- Focus on Tone and Emotion: Pay attention to the narrator's tone, particularly when discussing critical points like the advantages and drawbacks of nuclear energy. Emulating emotional expression can significantly enhance your speaking skills.
- Break It Down: Take short segments of the transcript, repeating each one multiple times before moving on. This helps in mastering tricky phrases and pronunciations.
- Record Yourself: Use a recording device to capture your shadowing attempts. Listen to your recordings to identify areas for improvement in pronunciation and fluency.
- Stay Consistent: Practice regularly on a dedicated shadowing site where you can focus on various topics to keep your learning dynamic and engaging.
Engaging with nuclear energy content not only expands your vocabulary but also empowers you to engage in discussions about complex topics in English. Enjoy your practice!
דקדוק בסרטון הזה
המבנים שהדובר משתמש בהם הכי הרבה, עם המילים המדויקות מהסרטון:
| מבנה | בסרטון |
|---|---|
| סביל (Passive voice) be + past participle — הדגש הוא על מה שקורה, לא על מי שעושה את הפעולה | were built · is absorbed · is needed |
| משפטי זיקה (Relative clauses) who / which + clause — מידע נוסף על אדם או דבר | people who didn · job, which is · countries which are |
| הווה מושלם (Present perfect) have/has + past participle — פעולה שקרתה בעבר ועדיין יש לה חשיבות או השפעה עכשיו | Have you ever been · has stagnated |
מהי טכניקת השאדואינג?
שאדואינג היא טכניקת למידת שפה מבוססת מדע שפותחה במקור להכשרת מתורגמנים מקצועיים ופופולרית על ידי הפוליגלוט ד"ר אלכסנדר ארגואלס. השיטה פשוטה אך עוצמתית: אתה מקשיב לאודיו באנגלית ילידית וחוזר עליו בקול רם מיד — כמו צל העוקב אחרי הדובר עם עיכוב של 1–2 שניות בלבד. בניגוד להאזנה פסיבית או תרגילי דקדוק, שאדואינג מכריח את המוח והשרירים בפה לעבד ולשחזר דפוסי דיבור אמיתיים בו זמנית. מחקרים מראים שזה משפר משמעותית את דיוק ההגייה, האינטונציה, הקצב, הדיבור המחובר, הבנת השמיעה ושטף הדיבור — מה שהופך אותו לאחת השיטות היעילות ביותר להכנה לIELTS Speaking ולתקשורת באנגלית בעולם האמיתי.