Nuclear Energy.

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Presentation transcript:

Nuclear Energy

Nuclear Energy This is uranium. A small amount of fuel produces a vast amount of energy. It also produces lots of radioactive waste! In a reactor, nuclear reactions release energy from the nuclei of uranium atoms. This heats water to make steam for driving generators

Nuclear Fission

The Splitting up of Atoms Is Called Nuclear Fission Nuclear power stations and nuclear submarines are both powered by nuclear reactors In a nuclear reactor,a controlled chain reaction takes place in which uranium atoms split up and release energy in the form of heat. This turns water to steam to drive a turbine & generate electricity

The Chain Reaction neutron neutron 1 neutron Uranium atom neutron Each time a Uranium atom splits up it spits out 2 or 3 neutrons, one of which hits another uranium nucleus, causing it to split. This keeps the chain reaction going

The Chain Reaction Uranium atom When the Uranium atom splits into two it will form two lighter elements that are also radioactive. This becomes radioactive waste and is a big problem for nuclear power stations as it can remain dangerous for hundreds of years

Nuclear Processes Release More Energy Than Chemical Processes When a nucleus splits it gives out a lot more energy than a chemical bond. This is why nuclear bombs release a lot more energy than other bombs

Did you know? The average human body contains 7 x 1018 joules of potential energy – enough to explode with the force of thirty large hydrogen bombs! Everything has this kind of energy in it – we are just not very good at getting it out. (The Uranium Bomb is the most energetic thing we have produced – yet it released only 1% of the total energy within it)

Nuclear Fission Return to Menu

Power Stations

What is a power station? Power Stations are places where electrical energy is made. Electrical Energy is a convenient form of energy to use in our homes.

Fossil Fuel Power Stations can generate a lot of pollution In the form of carbon dioxide, sulphur dioxide and smoke

The sulphur dioxide can lead to the production of acid rain And whole forests It can damage leaves Return to menu

The National Grid

What is the National Grid? When electricity is generated in the power station it is transported to us by the National Grid It is a network of pylons and cables that covers the whole country

Step-down Transformer The National Grid Power Station 25,000V Step-down Transformer Homes Step-up Transformer 400,000V 230V Return to Menu