Thursday, August 14, 2008

Nuclear power

Nuclear power is generated using Uranium, which is a metal mined in various parts of the world.
The first large-scale nuclear power station opened at Calder Hall in Cumbria, England, in 1956.
Nuclear power stations work in pretty much the same way as fossil fuel-burning stations, except that a "chain reaction" inside a nuclear reactor makes the heat instead.
The reactor uses Uranium rods as fuel, and the heat is generated by nuclear fission. Neutrons smash into the nucleus of the uranium atoms, which split roughly in half and release energy in the form of heat.
Carbon dioxide gas is pumped through the reactor to take the heat away, and the hot gas then heats water to make steam.

The steam drives turbines which drive generators.
Modern nuclear power stations use the same type of turbines and generators as conventional power stations.


Advantages
Nuclear power costs about the same as coal, so it's not expensive to make.

Does not produce smoke or carbon dioxide, so it does not contribute to the greenhouse effect.

Produces huge amounts of energy from small amounts of fuel.

Produces small amounts of waste.

Nuclear power is reliable.


Disadvantages
Although not much waste is produced, it is very, very dangerous.
It must be sealed up and buried for many years to allow the radioactivity to die away.

Nuclear power is reliable, but a lot of money has to be spent on safety - if it does go wrong, a nuclear accident can be a major disaster. people are increasingly concerned about this

1 comment:

Bijoy said...

Dear mekkattu


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