Nuclear Energy

Nowadays, energy can be obtained through various sources such as oil, coal, natural gas, solar heat, wind, etc. But the conventional energy like oil, coals are being used up rapidly, and solar heat can't bee widely used immediately for technological reason. In my opinion, unclear energy will take the place of conventional energy, because people now can control this energy freely, and unclear energy is non-polluting, inexhaustible, and it's much safer than coal and oil. Coal and oil are burned, they also produce many harmful gases, and the air has been seriously polluted by such gases, which will threaten people's living environment. And many accidents happened because of the wrong use of such energies.

However, such things can't happen when we use nuclear energy, Though when the nuclear leaks out, it will do great harm to people's health and the environment. We can do enough work to avoid such things, and limited such things at a low percentage.

I believe if we use the nuclear energy in the right way, it will provide us enough energy without doing any harm to us. A 300-word essay on nuclear power in my heart

The selection of excellent works and the vivid explanations of popular science commentators gave visitors a more intuitive and in-depth understanding of nuclear power and the Xudabao Nuclear Power Project. The Huludao City Mass Art Museum has been responsible for the city's mass art activities for a long time. The composition competition for college, middle school and primary school students has been organized in Huludao City for six times. The scope covers more than 800 schools and more than 400,000 students participated. These issues have attracted widespread and high attention. The three-dimensional Xu Dabao sand table and nuclear power unit model are set up in this nuclear energy science exhibition. Director Qu said: "I am very supportive. The convening of this event also hopes that nuclear power knowledge can be spread in Binhai

In every corner of Bincheng, it cannot stop people from visiting. The four major sections of safety and economic environment contribution rate, and the vivid explanations of popular science commentators have given visitors a more intuitive and in-depth understanding of nuclear power and the Xudabao Nuclear Power Project. Understanding of the "Nuclear Power Cup" essay competition essay is divided into two parts, the activity concept of "Integrating Liaoning Nuclear Power into Society". After friendly negotiation, the two parties finally signed a cooperation agreement? How does nuclear power ensure safety? The holding of this nuclear power science exhibition, Effectively help citizens understand nuclear radiation scientifically and correctly. Cooperate with the nuclear power science exhibition, adhering to the principle of "let the society understand Liaoning Nuclear Power," Director Qu said, and master the relevant knowledge of protection. Focusing on these issues that have attracted much attention from all parties, the three-dimensional Xudabao sand table , and finally after layers of selection and nuclear power unit models, the cleanliness of nuclear power was highlighted. The organizing committee of the Nuclear Power Science Popularization Exhibition also distributed more than 200 science popularization manuals to visitors? What impact will the construction of Xudapu Nuclear Power Plant bring to our city... With the Xudapu Nuclear Power Project settling in Xingcheng: "I strongly support the holding of this event. Nearly 300 people visited the Nuclear Power Science Exhibition. It is easy to understand." For a long time, Deputy Director Wang Nailong received visitors, and the composition contest for primary school students has been organized in Huludao City for six times. The maximum number of teachers and students participating in the organized activities was more than 200,000. It was drizzling that day, and how about writing an essay about nuclear power? Write

This should be written in two parts

First of all, nuclear power is an important achievement of the development of human science and technology, providing mankind with clean and powerful energy, and may also replace coal in the future. , oil and other traditional energy sources; secondly, nuclear power is also very dangerous. Once an accident occurs, the consequences will be unimaginable, and the radioactive waste it generates is also a major hidden danger.

Finally, we can give examples, such as. The Chernobyl nuclear leak in the Soviet Union and the accident at the Fukushima nuclear power plant in Japan.

This is purely hand-written. Thank you. If you have any questions, please ask, and don’t forget to accept it! About Fukushima, Japan! Essay on opinions on nuclear power plant explosions

Although the Fukushima nuclear accident was caused by a natural disaster, safety issues related to nuclear power generation are still unavoidable.

Although nuclear power has been used for decades. Power generation technology has made great progress, and the safety measures of nuclear power plants have also become more rigorous. However, the Fukushima nuclear accident shows that the occurrence of natural disasters is unpredictable and the destructive power is difficult to estimate.

At the same time, the Fukushima accident also caused us to reflect. As time goes by, the Fukushima accident can further improve the technology and awareness of ensuring the safety of nuclear power plants. At the same time, the development of other new energy sources, such as renewable energy, can also It will receive greater attention, receive greater investment, and be able to achieve faster progress and breakthroughs in technology, benefiting all mankind.

The Fukushima disaster reflects the following issues, which are worth pondering: First. , modern environmental awareness is rising, and any pollution of the earth's ecology and air may affect neighboring countries and even the whole world; the international community must come forward to formulate countermeasures.

Secondly, "unity and security". The principle of universality of the concept has been increasingly accepted by most countries; "security" is no longer the patent of one country, nor can it be monopolized by one superpower.

Therefore, how to work together to protect the earth. Ecology has become the common responsibility of all countries.

Third, technology is not high energy.

"Water can carry a boat, but it can also capsize it." Nuclear energy is certainly beneficial to human peace. It has many benefits, but improper use can also bring untold disasters.

I hope you can adopt it! What I know about nuclear power (composition, letter form)

July On the 1st, Ai Guowen, a representative of the Preparatory Committee of the 7th "Nuclear Power Cup" Essay Contest for College, Middle and Primary School Students in Huludao City, and his party came to CNNC Liaoning Nuclear Power Co., Ltd. to discuss matters related to the composition contest. CNNC Liaoning Nuclear Power Co., Ltd. Qu Xianliang, director of the company's Party and Mass Supervision Department, and Wang Nailong, deputy director, received the visitors.

Director Qu first gave a detailed report on the company’s basic situation and talked about his understanding of this event. Director Qu said: “I very much support the holding of this event, and I also hope that Nuclear power knowledge can be spread in every corner of Bincheng.

Liaoning Nuclear Power has always carried out science popularization activities with local governments, schools and other departments, adhering to the principle of "let the society understand Liaoning Nuclear Power and integrate Liaoning Nuclear Power into society." Our activity concept strives to take root in the beautiful land of Huludao."

Ai Guowen, representative of the organizing committee, introduced that the Huludao City Mass Art Museum has long been responsible for the city’s mass art activities.

The composition contest for college, middle and primary school students has been organized for six times in Huludao City. The scope of activities covers more than 800 schools and more than 400,000 students participated. The maximum number of teachers and students participating in the organized activities is more than 200,000. people.

After friendly negotiations, the two parties finally signed a cooperation agreement.

There are two compositions for this "Nuclear Power Cup" Essay Contest. Each unit will carry out publicity work at one level. Finally, after selection and submission at all levels, outstanding works will be selected and a city-wide summary and commendation meeting will be held. Perform awards.

How is nuclear energy generated? How to ensure safety in nuclear power? What impact will the construction of the Xudapu Nuclear Power Plant bring to our city... With the Xudapu Nuclear Power Project settling in Xingcheng, these issues have attracted widespread and high attention.

Focusing on these issues that have attracted much attention from all parties, this nuclear energy science exhibition has four major sections: nuclear energy, nuclear power, safety and economic and environmental contribution rates.

The exhibition content covers all aspects of nuclear energy and popular science knowledge in the field of nuclear power. It not only highlights the clean, efficient and safe characteristics of nuclear power, but also reflects the impact of nuclear power on environmental protection, resource utilization, social development and humankind. special role in survival.

The easy-to-understand exhibition boards with pictures and texts, the three-dimensional Xudabao sand table, the nuclear power unit model, and the vivid explanations of the popular science instructors gave visitors a more intuitive and in-depth understanding of nuclear power and the Xudabao Nuclear Power Project. understanding.

In conjunction with the Nuclear Power Science Popularization Exhibition, the Nuclear Power Science Popularization Exhibition Organizing Committee also distributed more than 200 science popularization manuals and more than 300 leaflets to visitors.

It was drizzling that day, but it could not stop people from visiting. Nearly 300 people visited the nuclear power science exhibition.

Visitors also signed on the signature board of the Nuclear Power Science Exhibition.

The holding of this nuclear power science exhibition effectively helped citizens to scientifically and correctly understand nuclear radiation and master relevant knowledge of protection. It also guided the general public to establish the concept of learning and applying science, and created a good social atmosphere. How to write an essay about the Three Gorges Dam?

Three Gorges Dam Three Gorges Dam The Three Gorges Dam is the largest water conservancy project in the world today.

It is located on Zhongbao Island, Sandouping, in the middle section of Xiling, adjacent to Jiguixin County in Hubei Province to the south.

The dam is 1983 meters long, with an altitude of 185 meters at the top of the dam. The total storage capacity is 39.3 billion cubic meters. It has 26 installed power stations with a capacity of 18.2 million kilowatts. The annual power generation reaches 84 billion kilowatt hours, equivalent to 10 Daya Bay Nuclear Power Plant.

I was fortunate enough to visit the Three Gorges Dam on May 6, 2006. When I boarded the 185 platform, my first impression was that it was so beautiful. The dam and the Yangtze River were all in sight, and the scenery was faint. You can see six huge gates about 100 meters high. I heard from the tour guide that these gates are called gates. When the boat enters, the gates are closed. The boat is slowly raised, so that the boat moves from downstream to upstream and finally opens. The lock ship can leave.

After listening to the tour guide’s explanation, I felt more than just how curious I was.

The Three Gorges Dam can not only send the ship away safely, but also have flood control, power generation, shipping, breeding, and water supply functions. The most important feature is that it can turn a once-in-ten flood into a once-in-a-hundred-year flood. You guys See God is not miraculous. An English composition about the pros and cons of nuclear power plants

I saw this. As the seriousness of Japan's nuclear leakage became increasingly serious, your school students held an English debate last week.

The topic of the debate is: "Should nuclear power plants be developed?" The students in Group A and Group B who participated in the debate had completely different opinions.

Based on the information provided in the table below, please write an English short article for a magazine to objectively introduce the situation of the debate.

The beginning is given.

Group A’s opinions Group B’s opinions 1. Nuclear power plants should be developed.

1. The development of nuclear power plants should be restricted.

2. Bring more electricity to people and relieve the pressure on electricity consumption.

2. Can cause various types of pollution including air pollution.

.3. Create employment opportunities. 3. Environmentally friendly power stations such as solar energy should be developed.

……Note: 1. About 100 words; 2. No word-for-word translation is allowed.

nuclear power station solar energy************************************ ***************************************Last week, we had a debate about whether we should develop nuclear power stations. Opinions are divided. During the debate, Some students said we should develop nuclear power stations, since it would bring much electricity to people, and reduce the pressure of using electricity in the world. Meanwhile, it can create more jobs. Hoever , the others thought the government should limit the number of nuclear power stations, since they will cause all kinds of pollution, air pollution included. They thought solar energy power stations, which are environmentally friendly, should be developed. Hope it helps. .. What is nuclear energy? 200-word essay

Nuclear energy is also called atomic energy.

The energy released when the nucleons in an atomic nucleus are redistributed.

Nuclear energy can be divided into three categories: (1) Fission energy, the energy released when the atomic nuclei of heavy elements (such as uranium, plutonium, etc.) split; (2) Fusion energy, which is produced by light elements (deuterium) and tritium) The energy released when the atomic nucleus undergoes a polymerization reaction; (3) The radioactive energy released when the atomic nucleus decays.

The difference between nuclear energy and chemical energy is that chemical energy obtains energy from the exchange of electrons between atoms in chemical reactions.

For example, when coal or oil is burned, only a few electron volts of energy can be released during the oxidation of each carbon or hydrogen atom, while nuclear energy relies on the redistribution of nucleons (neutrons or protons) in the nucleus. Gain energy, which is surprisingly powerful.

For example, when each uranium nucleus fission, it can release 200 million electron volts of energy, so the energy released when 1kg of uranium fission is equivalent to 2500t of standard coal.

The energy released by the same amount of fusion fuel during fusion is 4 to 5 times greater than the fission energy.

Now, people have used nuclear fission energy to generate electricity and heat, and are also studying controlled nuclear fusion in an attempt to develop and utilize nuclear fusion energy.

The use of radioactive energy is also relatively common. For example, radioactive batteries use the energy released during the decay process of plutonium-238 to generate electricity.

Nuclear power generation Nuclear power generation is a method of generating electricity that uses a mineral called "uranium" as fuel.

When the heavier nuclei in the uranium raw material are collided with neutrons, they will split into smaller nuclei and release a large amount of heat energy, turning water into water vapor, driving generators, generating electricity, and supplying electricity. For everyone to use.

So, when you turn on the power, you can watch TV and listen to music. This is the result of the nuclear power plant running day and night! Nuclear energy and its risks, pros and cons As mentioned earlier, with the development of society and the advancement of science and technology, human demand for energy has increased dramatically.

The massive burning of fossil fuels has brought serious environmental problems to people, and their reserves on the earth are increasingly facing depletion.

Since this century, energy crises have swept through Western countries again and again.

In our country, the energy supply situation has been tense for more than 20 years. Since the 1980s, the country has been short of more than 20Mt of coal, more than 10Mt of oil, and more than 500*108kWh of electricity every year.

About 25% of the country's industrial production capacity cannot function due to lack of energy. Before 1996, the energy industry became a "bottleneck" industry restricting my country's economic development.

In order to alleviate this contradiction in energy, nuclear power has developed rapidly.

By the end of 1995, there were 476 nuclear power plants in operation or under construction around the world.

Nuclear power has become the main energy source in some countries.

Table 4.6 lists the countries where nuclear power accounted for more than 10% of the total electricity in 1985.

my country's energy resources are unevenly distributed, and the policy for energy development is to "promote thermal power, hydropower, and nuclear power simultaneously, and adapt measures to local conditions."

The first 30*104kW pressurized water reactor nuclear power station designed and built in Qinshan, Zhejiang Province was connected to the grid in 1992.

Two sets of 90*104kW nuclear power units introduced in Daya Bay, Guangdong were also put into operation in 1993 and 1994 respectively.

Two sets of 60*104kW nuclear power units in the second phase of Qinshan project and two sets of 90*104kW nuclear power units in the second phase of Daya Bay project have started construction one after another.

With the development of economy, my country's nuclear power will enter a period of rapid development.

By the end of this century, the installed capacity is expected to exceed 1.0*107kW.

There are 6 nuclear power units in operation in Taiwan Province of my country, with an installed capacity of 4.89*106kW, and two more 1.0*106kW nuclear power units are under bidding and construction.

Nuclear fission reaction: The atomic nucleus of the heavy metal element uranium-235 absorbs a neutron and produces a nuclear reaction, causing the heavy atomic nucleus to split into two (rarely 3) lighter nuclei and 2- 3 free neutrons, as well as beta and gamma rays and neutrinos, and release huge amounts of energy. This process is called nuclear fission.

When neutrons bombard the uranium-235 nucleus, part of the uranium-235 nucleus absorbs the neutrons and fission occurs.

If the neutrons produced by the nuclear fission of uranium-235 bombard another uranium-235, it will cause new fission. If this continues, it is a chain reaction of fission.

This chain fission reaction maintains itself, or the condition (or state) to maintain a self-sustaining chain fission reaction is that at least one neutron and no more than one neutron arrives from each fission to another Fission.

This state is called "critical state".

The self-sustaining chain reaction of neutrons and uranium-235 nuclei can be controlled by humans.

Currently, the most commonly used control method is to put or remove materials that can absorb neutrons into fissile materials that produce chain reactions (such as uranium-235).

During normal operation, the fissile material is kept in a critical state and a stable chain fission reaction is maintained, thus maintaining a stable release of nuclear energy. If the chain reaction needs to be stopped, more neutron-absorbing materials are put in; If more nuclear energy is required to be released, certain neutron-absorbing materials can be removed.

This kind of device that can maintain and control nuclear fission, and therefore maintain and control nuclear energy-thermal energy conversion, is called a reactor.

1. Composition of atoms Atoms are composed of protons, neutrons and electrons.

All matter in the world is made up of atoms, and any atom is made up of a positively charged nucleus and negatively charged electrons rotating around the nucleus.

A uranium-235 atom has 92 electrons, and its nucleus is composed of 92 protons and 143 neutrons.

500,000 atoms arranged equal to the diameter of a hair.

If the atom is compared to a huge palace, the size of its nucleus is only a soybean, and the electron is equivalent to the tip of a pin.

A 1 million kilowatt thermal power plant burns about 3.3 million tons of coal every year and requires many trains to transport it.

A nuclear power plant with the same capacity only uses 30 tons of fuel a year.

2. The structure of the atomic nucleus. The nucleus is generally composed of protons and neutrons. The simplest hydrogen nucleus has only one proton. The number of protons in the nucleus (i.e., the atomic number) determines what element the atom belongs to. , the sum of the number of protons and the number of neutrons is called the mass number of the atom.

3. Some atoms with the same proton number P but different neutron number N in isotopes, or some atoms with the same atomic number Z but different atomic mass numbers, occupy the same position on the periodic table of chemical elements. , called isotopes.

Therefore, the term "isotope" is used to refer to various atoms of an element, which have the same chemical properties.

Isotopes are usually divided into heavy isotopes (such as uranium-238, uranium-235, uranium-234 and uranium-233) and light isotopes (such as hydrogen isotopes such as deuterium and tritium) according to their different masses.

4. Nuclear energy More than 50 years ago, scientists discovered that the uranium-235 nucleus can split after absorbing a neutron, and simultaneously release 2-3 neutrons and a large amount of energy. The energy released is greater than that in chemical reactions. The energy released is much greater. This is nuclear fission energy, which is what we call nuclear energy.

Atomic bombs use the energy released by nuclear fission to kill and destroy, and nuclear power reactors also use this principle to obtain energy. The difference is that it can be controlled.

5. Light nuclear fusion. Two lighter nuclei fuse to form a heavier nucleus and release huge energy at the same time. This reaction is called light nuclear fusion reaction.

It is one of the important ways to obtain nuclear energy.

In the interior of stars such as the sun, due to extremely high pressure and temperature, light nuclei have enough kinetic energy to overcome electrostatic repulsion and undergo continuous fusion.

The self-sustaining nuclear fusion reaction must be carried out under extremely high pressure and temperature, so it is called "thermonuclear fusion reaction".

The hydrogen bomb uses the fusion reaction of deuterium and tritium nuclei to instantly release huge energy to kill and destroy. The controlled thermonuclear fusion reaction device under study also applies this basic principle. The biggest difference between it and the hydrogen bomb is that it The release of energy can be controlled.

6. Characteristics of uranium and its energy release. Uranium is the element with the largest atomic number in nature. Natural uranium is composed of several isotopes: in addition to 0.71 uranium-235 (235 is the mass number), trace amounts of uranium Except for -234, the rest is uranium-238. The energy released by the complete fission of the uranium-235 nucleus is 2,700,000 times the energy released by the complete combustion of the same amount of coal.

In other words, the energy released by the complete fission of 1 gram of U-235 is equivalent to the energy released by the complete combustion of 2 tons of semi-high-quality coal.

7. How to release nuclear energy There are two main ways to obtain nuclear energy, namely heavy nuclear fission and light nuclear fusion.

U-235 has a characteristic, that is, when a neutron bombards its atomic nucleus, it can split into two atomic nuclei with smaller mass, producing 2-3 neutrons and β and γ at the same time. rays and releases an energy of about 200 MeV.

If a newly generated neutron bombards another uranium-235 nucleus, it will cause new fission, and so on, so that the fission reaction continues continuously. This is the fission chain. In a chain reaction, nuclear energy is continuously released.

8. Release of nuclear fusion energy The energy released when the same amount of light nuclei as uranium is fused is several times greater than that of uranium.

For example, the energy produced by the complete reaction of 1 gram of lithium deuteride (Li-6) is approximately three times the fission energy of 1 gram of uranium-235.

The conditions for achieving nuclear fusion are very demanding, that is, the hydrogen nuclei need to be at a high temperature of tens of millions of degrees in order for the considerable nuclei to have kinetic energy to achieve polymerization reactions.

9. Nuclear power plants are clean energy. Most of the current environmental pollution problems are caused by the use of fossil fuels. The burning of fossil fuels will release a large amount of smoke, carbon dioxide, sulfur dioxide, nitrogen oxides, etc., which are harmful to the environment. The "greenhouse effect" caused by gases will increase the earth's temperature, cause climate abnormalities, accelerate the land desertification process, and have a catastrophic impact on the sustainable development of society and economy. Nuclear power plants do not emit these harmful substances and will not cause The "greenhouse effect", compared with thermal power plants, can greatly improve environmental quality and protect the ecological environment on which human beings depend.

People live, swim, herd cattle and sheep, and fish around foreign nuclear power plants. Some nuclear power plants are located near big cities, and some are located in tourist areas.

Nuclear power plants are safe, economical and clean energy. Compared with thermal power plants, they are more conducive to...

Please indicate the source for reprinting. Nuclear energy is an English composition. Should nuclear power be established