Практика Shadowing: What Happens To Nuclear Waste? - Изучайте разговорный английский по видео
Создание урока...
1
When you pass a nuclear power plant in the distance as you drive down the road, it's impossible not to think about the power that those towering buildings hold.
2
Scientist Enrico Fermi supervised the opening of the first nuclear reactor in 1942, and now our landscapes are dotted by mighty nuclear power plants.
3
These powerful energy plants provide over a fifth of the United States' electricity
4
and don't have the carbon footprint of other energy sources like coal and fossil fuels, so why not build more?
5
One reason?
6
Nuclear waste and radioactivity.
7
When managed correctly, nuclear power plants are processing powerful radioactive energy
8
that needs to be disposed of correctly to keep the environment and the people handling it safe.
9
And if someone wasn't handling the planet's safety correctly, like a certain bald bumbler from Springfield, things could go very badly.
10
Dope.
11
The risks of nuclear energy become crystal clear in 1979 in Londonderry Township, Pennsylvania, at the Three Mile Island nuclear plant.
12
While the reactors were stable, a failure in the mechanical systems regulating the safe venting of gases broke down
13
and allowed a large amount of nuclear reactor coolant to escape.
14
That led to a partial meltdown of reactor two, creating a major radiation leak near the city of Harrisburg.
15
A voluntary evacuation of a 20 -mile radius around the plant followed.
16
Thankfully, no one in the plant was injured and later tests showed no increased risk of cancer, but it took 15 years to clean up the surrounding area.
17
It It remains the worst nuclear accident in United States history, but is dwarfed by the massive nuclear meltdown at Chernobyl
18
which caused major casualties and rendered areas surrounding the Ukrainian plant uninhabitable to this day.
19
Given the risks, it's no surprise that nuclear waste and by -products are strictly regulated by the government.
20
Modern nuclear plants keep waste to a minimum by recycling used fuel back into the uranium -based and mixed oxide fuel,
21
but 4 % of nuclear waste can't be processed and remains highly radioactive.
22
Radioactivity is a waiting game as the toxic quality of the waste decreases over time,
23
measured in half -life, or the time it takes for a radioactive substance to reduce to half of its nuclear value.
24
The time it takes for nuclear waste to neutralize varies wildly.
25
Some common isotopes, like strontium -90, have a half -life of around 30 years,
26
but other powerful artificial nuclear isotopes like plutonium -239 have a half -life of over over 20 ,000 years.
27
Not only is it radioactive enough to kill anyone exposed to it, but it could be an unpleasant surprise for whoever digs it up in the far future.
28
Nuclear power plants operate in 31 countries, including all of the world's largest economies, and much of Asia and Africa are planning new builds.
29
The regulation of nuclear waste is overseen by the International Atomic Energy Agency's Joint Convention on Spent Fuel Management, and they work to keep the world safe life.
30
The risks of exposure to nuclear waste include higher risk of cancer, higher risk of birth defects in pregnant women, and in high concentrations, organ failure, and death.
31
Most nuclear waste comes from nuclear power plants and nuclear arms, but medical and industrial waste and natural radioactive materials also pose a risk.
32
Nuclear waste comes from two main sources, front -end and back -end.
33
Front -end nuclear waste comes from the extraction of uranium and contains radium.
34
The depleted uranium that comes from it is extremely dense
35
and is often recycled into anti -tank shells and other metals where extreme durability is needed.
36
Back -end nuclear waste comes from spent fuel rods and is packed with beta and gamma radiation.
37
These powerful energies come with extremely long half -lives and are formed in nuclear reactors.
38
Some of the most challenging waste to dispose of comes from nuclear weapons materials, and the plutonium used to create these powerful bombs is extremely difficult to separate and isolate.
39
That makes nuclear weapon disposal a growing concern, especially in the aftermath of the Cold War when the US and Russia drastically slashed their nuclear arsenals.
40
The world is less likely to end now, but what are we going to do with all those things that can end the world?
41
The classification of nuclear waste determines the priority level of the processing and disposal.
42
The lowest priority nuclear waste is uranium mill tailings, which are created by the rough processing of uranium ore.
43
While they don't contain a high level of radioactivity, they have long half -lives and are full of metals with other health risks like arsenic and lead.
44
Low -level waste is the most common waste type because it's anything that came into contact with radioactivity.
45
Common in hospitals and processing plants, it can include paper, clothing, tools, and filters that are used by people working with nuclear energy.
46
These objects pick up trace levels of radioactivity and should be disposed of safely instead of being processed with standard trash.
47
Intermediate waste is usually the byproduct of nuclear processing and is harder to dispose of than low -level waste.
48
Resins, chemical sludge, and metal coverings
49
that have been exposed to nuclear energy long -term pick up the harmful radioactivity and the hazardous nature builds over time.
50
When breaking down a nuclear reactor for decommissioning, even the building materials surrounding the core can build up radioactivity.
51
Before disposing of this waste, it should be safely shielded to prevent exposure.
52
Then there's high -level waste, and this is what everyone thinks about when they hear about nuclear power plants.
53
The alarms start blaring, the hazmat suits go on, high -level nuclear waste is as radioactive as you think.
54
But the good news is, there are effective ways to contain it.
55
When a nuclear fuel rod serves its purpose and is taken out of the core, it becomes high -level waste.
56
While the number of high -level waste objects is small compared to the other classes,
57
the level of radioactivity is so high that it accounts for over 95 % of total radioactivity caused by nuclear energy.
58
While most radioactive isotopes produced by high -level waste are high -powered but have a short half -life,
59
the presence of isotopes like plutonium makes it critical to ensure it's contained safely.
60
So what's the best way to dispose of nuclear waste?
61
That's what nuclear energy -using countries have been arguing over for decades.
62
Most experts say the best solution for long -term disposal is
63
by constructing a deep underground facility similar to a mine
64
that can contain large amounts of high -level waste away from humans and be sealed up in between disposals.
65
But that's easier said than done, and no country has finished one, although Finland is close to completing their Onkalo spent nuclear fuel repository on the west coast.
66
Currently countries use a number of alternative systems that are considered safe, but imperfect.
67
The first step to minimize the impact of nuclear waste on the environment is to neutralize it as much as possible.
68
This is done by processing it and stabilizing it into a form that loses its explosive properties.
69
Some countries mix the waste with sugar and then calcinate it into a solid object by processing it through a rotating tube.
70
Turned into glass, the waste products are then bonded to the other molecules and then poured into stainless steel and sealed.
71
They are then stored underground, where the waste products are trapped for thousands of years without leaking radioactivity into the environment.
72
Other technologies include ion exchange, where medium -level wastes are neutralized by concentrating the radioactivity into much smaller volumes.
73
This makes them easier to contain, but isn't recommended with volatile high -level wastes.
74
But when the time range for nuclear waste to become deactivated can reach into the millennia or longer, with some rare isotopes having a half -life of over a million years,
75
scientists are concerned that these storage methods can come back to haunt us.
76
That's why we've eliminated many of the more short -sighted methods of nuclear waste disposal, like ocean disposal.
77
Up until the 1990s many countries, including the United States and the Soviet Union, would dump drums of contained nuclear waste into the ocean, especially in the coastal regions of Somalia.
78
Somalia hasn't had a functioning government since the 1990s, and the pirates weren't going to mess with a large ship bearing a country's flag
79
when they could go after smaller merchant ships, so countries thought anything goes out there there.
80
The Arctic Ocean was also a popular choice for the Soviets, as they controlled a huge coast in the north.
81
Overall, 137 ,000 tons were dumped in the water by European countries in 34 years, and it took its toll on the oceans.
82
Tests of areas where dumping was common found elevated levels of radioactivity, and in 1993 a treaty was passed banning ocean disposal of nuclear waste.
83
The most common current method for nuclear waste disposal is above -ground disposal, where Their waste is sealed up in a steel cylinder with an inert gas
84
that won't react with it and then sealed in radiation -shielding concrete.
85
The radiation -proof drums are then sealed in a storage facility near the nuclear power plant.
86
This is how big plants handle their waste in -house, and it's popular for a few reasons.
87
First, it's handled internally and the plant doesn't have to get approval
88
and fight their way through government red tape to find a dumping facility.
89
Second, it's inexpensive and doesn't require construction or expensive materials.
90
Finally, the waste remains on site for reprocessing, which remains the best solution for solving the nuclear waste question.
91
But the secret weapon for eliminating nuclear wastes is chemists and physicists,
92
as these scientists have developed ways to chemically separate fission products and unused uranium from used nuclear fuel.
93
This started by extracting plutonium, with its long half -life, from nuclear fuel to be used in the construction of nuclear weapons.
94
But as the focus shifted from bombs to energy plants, scientists developed ways to create a new type of nuclear fuel from the remnants of the old.
95
Mox nuclear fuel, or mixed oxide fuel, is created in high -level facilities from nuclear waste coming from plants around the country,
96
and has become a top way of disposing of nuclear waste in Europe.
97
In America, the government's focusing on research, and commercial nuclear fuel reprocessing isn't widespread yet.
98
So what will nuclear waste disposal look like in the future?
99
One of the biggest possibilities is space disposal, as this will get the radioactivity as far away from people as possible.
100
The problem, besides the possibility of poisoning some aliens that will come looking for revenge, is that technology isn't there yet.
101
While technology like mass drivers and space elevators is in development, the carrying capacity of our current space shuttles is limited
102
and would only be able to carry a small amount of nuclear waste.
103
The money that goes into every space shuttle launch is high, and the program is far from foolproof.
104
The loss of the Challenger and Columbia shuttles proved that a catastrophic accident is possible,
105
and a space shuttle disaster carrying a nuclear payload could contaminate a large area.
106
But could we transform nuclear waste into less harmful waste with a shorter half -life?
107
That was the dream of scientists behind the Integral Fast Reactor, an experimental reactor that would use a nuclear fuel cycle that reprocessed fuel through electro -refining.
108
It would extract almost all the energy contained in uranium, medium, cutting fuel requirements by two orders of magnitude.
109
Unfortunately the design had problems with leaking cooling fluid, and the project was cancelled by the US government in 1986.
110
But research is ongoing, and new fission reactors
111
that have much more processing power than the traditional light water reactors are under development now.
112
The earth itself might be our best ally for disposing of nuclear waste, as man -made structures underground are the top proposal for future storage facilities.
113
By digging out large, stable bunkers in sparsely populated areas of a country,
114
nations could keep their nuclear waste in a centralized location and reduce the risk of leaks happening in multiple locations.
115
Deep borehole disposal is an alternative that creates narrower
116
but much deeper holes capable of storing the waste up to three miles under the earth, where any leaks would be far away from humans.
117
The big holdup?
118
Besides developing the technology for safe deep earth drilling, getting approval from governments is a holdup.
119
Many countries have rejected proposals out of fears that the disposal won't be safe, or that it could destabilize the ground.
120
The consequences of a nuclear accident are massive and long -term, as the residents of Pripyat, Ukraine know all too well.
121
In the heart of the Chernobyl nuclear plant is the elephant's foot, a mass of solid nuclear waste caused by the 1986 meltdown.
122
Dense and hard to damage, it was so radioactive when released that it would kill anyone who was in the same room with it.
123
Today, over 30 years later, it's still highly radioactive and poses major health risks to anyone who's exposed.
124
So however we neutralize our nuclear waste, let's make sure it stays there.
📺 Тот же канал
B21
6'9" Brilliant Psychopath Who Hunted College Students (America's Most Evil Serial Killers)
Daily ConversationWorking Adults
B21
Crazy Laws That Still Exist Around The World
Daily ConversationWorking Adults
C12
20% Speed of Light!! NEW Light Engine is INSANE!
Daily ConversationUniversity StudentsWorking Adults
B21
These Crimes Will Send You To Death Row
Daily ConversationWorking Adults
B21
Insane Assassinations That Changed the World
University StudentsWorking Adults
B24
Warren Buffett Is Selling NOW. The $397 Billion COLLAPSE.
Business EnglishDaily ConversationUniversity Students
B21
The 7 Trillion AI Gamble Is Failing. Big Tech is TRAPPED Right NOW.
Business EnglishDaily ConversationUniversity Students
C14
The Limitless AI Lie. The Bubble Is Slowly BURSTING.
Business EnglishDaily ConversationUniversity Students
B21
50 Insane Facts About Vietnam War You Didn't Know
University StudentsWorking Adults
B21
15 Surprising Rules That Las Vegas Hotels Strictly Enforce
Travel EnglishDaily ConversationUniversity Students
B24
MH370's LAST Hunt. MYSTERY FINALLY SOLVED.
IELTS PrepTOEFL PrepUniversity Students
B24
Innocent on Death Row, Here's What You Actually Get When You're Released
IELTS PrepTOEFL PrepUniversity Students
B21
Countries with the Worst Punishments Today
IELTS PrepTOEFL PrepUniversity Students
B23
Maximum Security Prison Escape And Insane Crime Spree
IELTS PrepTOEFL PrepUniversity Students
B23
Why Did Hitler Hate Jews
Daily ConversationWorking Adults
B21
The Leaked Audit That Exposes OpenAI's Real Financial Crisis
Business EnglishUniversity StudentsWorking Adults
B21
Win $20,000 Dollars if You Survive this Haunted House
Daily ConversationUniversity StudentsWorking Adults
B21
The Next Great Recession Isn't Housing... Its FAR Dumber.
Business EnglishDaily ConversationUniversity Students
B22
Why Do You Have Pain Here When You Run
Daily ConversationUniversity StudentsWorking Adults
B21
Why You Will Go Broke Owning a McDonalds Franchise
Business EnglishWorking Adults
✨ Рекомендуемое видео
B27
37 предложений
3 Reasons Why Nuclear Energy Is Terrible! 2/3
Daily ConversationUniversity StudentsWorking Adults
B247
25 предложений
What is radioactive waste?
Daily ConversationWorking Adults
B22
169 предложений
New York's Buckling Tower: What Happens Now?
British AccentDaily ConversationWorking Adults
B21
250 предложений
Solar Storm Could Black Out Half of America - This Map Shows Where
Daily ConversationWorking Adults
B15
12 предложений
The Story of the Plastic Crisis (Animated Short)
Daily ConversationWorking Adults
B22
143 предложений
The Man Who Survived Both Atomic Bombs
Daily ConversationWorking Adults
B2133
16 предложений
Can Earth Run Out of Water?
Daily ConversationUniversity StudentsWorking Adults
B21
42 предложений
How does a nuclear power plant work?
Daily ConversationWorking Adults
B21
454 предложений
Most Expensive Mistakes In History
Daily ConversationWorking Adults
B21
12 предложений
Spicy Plate #chrisboden #comedy #radioactive #physics #radiation #nuclear #uranium #fiestaware
Daily ConversationWorking Adults
B21
208 предложений
What If a Needle Hit The Earth At The Speed Of Light?
Daily ConversationUniversity StudentsWorking Adults
B21
49 предложений
AI & Future Jobs: Skills You NEED Now!
Daily ConversationWorking Adults
О данном уроке
В этом уроке вы научитесь понимать и воспроизводить речевые паттерны на тему ядерных отходов, которые используются в научно-популярных видео. Вы потренируете слух для сложных терминов, улучшите произношение английского и научитесь выражать идеи о рисках и управлении опасными материалами. Материал подходит для практики разговорного английского, так как он сочетает простой разговорный стиль с технической лексикой.
Ключевые слова и фразы
- Nuclear waste — ядерные отходы
- Half-life — период полураспада
- Spent fuel rods — отработавшие топливные стержни
- Radioactivity — радиоактивность
- Decommissioning — выведение из эксплуатации
- "The risks of exposure" — риски воздействия
Советы по практике
Для эффективной тренировки используйте технику shadow speak (или shadow speech). Видео имеет среднюю скорость речи, с яркими паузами перед важными терминами — это идеально для повторения. Сначала прослушайте отрывок длиной 5-7 секунд, затем сразу повторите его, копируя интонацию и темп. Участвуйте в диалоге с видео: когда речь идет о рисках (например, "higher risk of cancer"), подчеркните важность слов с помощью повышения тона. Для улучшения произношения английского сосредоточьтесь на сложных сочетаниях, like "plutonium-239" или "nuclear power plant" — повторяйте их до тех пор, пока не получится плавно. Практикуйте по 10-15 минут ежедневно, и вы заметите прогресс в понимании и произношении уже через неделю.
Грамматика в этом видео
Конструкции, которые говорящий использует чаще всего, с точными словами из видео:
| Конструкция | В видео |
|---|---|
| Пассивный залог be + причастие прошедшего времени — важно, что происходит, а не кто это делает | are dotted · be disposed · was injured |
| Present Perfect have/has + причастие прошедшего времени — прошлое действие, важное сейчас | have been exposed · has finished · we've eliminated |
| Придаточные определительные who / which + предложение — уточнение о человеке или предмете | tailings, which are · anyone who was |
Что такое техника Shadowing?
Shadowing — это научно обоснованная техника изучения языка, изначально разработанная для подготовки профессиональных переводчиков и популяризированная полиглотом доктором Александром Аргуэльесом. Метод прост, но эффективен: вы слушаете аудио на английском от носителей языка и немедленно повторяете вслух — как тень, следующая за говорящим с задержкой в 1–2 секунды. В отличие от пассивного прослушивания или грамматических упражнений, Shadowing заставляет мозг и мышцы рта одновременно обрабатывать и воспроизводить реальные речевые паттерны. Исследования показывают, что это значительно улучшает точность произношения, интонацию, ритм, связную речь, понимание на слух и беглость речи — что делает его одним из самых эффективных методов для подготовки к IELTS Speaking и реального общения на английском.