Essay on (Nuclear energy – green energy )in 1000 words... Anyone plss help
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Nuclear Energy: Essay on Nuclear Energy!
Nuclear power is the power that is released by manipulating atoms, by splitting them apart (fission) or fusing them together, (fusion) (Fig. 3.6). Finally, there are some minerals included as energy sources in the non-renewable category.
A mineral such as uranium can be used to create heat and even electricity by means of nuclear fission (the splitting of its atoms).
Carbon Cycle
Nuclear power accounts for about 20 per cent of the total electricity generated in the United States. Nuclear power plant operates basically the same way as a fossil fuel plant, with one difference: the source of heat. The process that produces the heat in a nuclear plant is the fissioning or splitting of uranium atoms. That heat boils water to make the steam that turns the turbine-generator, just as in a fossil fuel plant. The part of the plant where the heat is produced is called the reactor core.
Most power plants burn fuel to produce electricity but not nuclear power plants. Instead, nuclear plants use the heat given off during fission as fuel. Fission takes place inside the reactor of a nuclear power plant. At the center of the reactor is the core, which contains the uranium fuel.
The uranium fuel is formed into ceramic pellets. The pellets are about the size of your fingertip, but each one produces the same amount of energy as 150 gallons of oil. These energy-rich pellets are stacked end-to-end in 12-foot metal fuel rods. A bundle of fuel rods is called a fuel assembly.
Fission generates heat in a reactor just as coal generates heat in a boiler. The heat is used to boil water into steam. The steam turns huge turbine blades. As they turn, they drive generators that make electricity. Afterwards, the steam is changed back into water and cooled in a separate structure at the power plant called a cooling tower. The water can be used again and again.
In the BWR, the water heated by the reactor core turns directly into steam in the reactor vessel and is then used to power the turbine-generator. In a PWR, the water passing through the reactor core is kept under pressure so that it does not turn to steam at all — it remains liquid. Steam to drive the turbine is generated in a separate piece of equipment called a steam generator.
A steam generator is a giant cylinder with thousands of tubes in it through which the hot radioactive water can flow. Outside the tubes in the steam generator, non-radioactive water (or clean water) boils and eventually turns to steam.
The clean water may come from one of several sources: oceans, lakes or rivers. The radioactive water flows back to the reactor core, where it is reheated, only to flow back to the steam generator. Roughly seventy percent of the reactors operating in the U.S. are PWR.
Nuclear reactors are basically machines that contain and control chain reactions, while releasing heat at a controlled rate. In electric power plants, the reactors supply the heat to turn water into steam, which drives the turbine- generators. The electricity travels through high voltage transmission lines and low voltage distribution lines to homes, schools, hospitals, factories, office buildings, rail systems and other users.
Explanation:
Nuclear energy is the energy that is obtained from the heat released when radioactive atoms are broken down further by nuclear fission, fusion methods. The heat energy is then used to generate steam for turbine. This energy is green or environmental friendly as this process does not yield any toxic waste or fumes in the environment. Also this process is extremely dangerous and performed in a controlled manner but it has least impact on environmental pollution