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7/28/2019 Nuclear Power Plants-prezentacija
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increasing need for energy caused bygrowth of universal standards of
production and consumption global reliance on fossil fuels and large
hydro trend will remain at least until 2020year, but it will not be enough to satisfythe growing needs of people
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The Manhattan Project
This project costs United States over $2
billions, all for the bomb, as no work wasbeing done on other applications of nuclearenergy
Hiroshima and Nagasaki, August 1945
December 1951, the first nuclear reactorto produce electricity and sited in Idaho,USA
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Fusion offers important advantages: no carbon emissions, noair pollution, unlimited fuel, and is intrinsically safe. Whilefusion technology is not at the deployment stage, thepotential is substantial. The fusion reaction is about four million
times more energetic than a chemical reaction such as theburning of coal, oil or gas.
Nuclear fusion is the energy source of the future.
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In a nuclear-fueled power plant much like a fossil-fueledpower plantwater is turned into steam, which in turn drivesturbine generators to produce electricity. The difference isthe source of heat. At nuclear power plants, the heat to
make the steam is created when uranium atoms split
calledfission. There is no combustion in a nuclear reactor.
There are two types of nuclear reactors in the United States:
Pressurized Water Reactors (also known as PWRs)
Boiling Water Reactors (also known as BWRs)
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Pressurized Water Reactors (also known as PWRs) keep water underpressure so that it heats, but does not boil. This heated water iscirculated through tubes in steam generators, allowing the water inthe steam generators to turn to steam, which then turns the turbinegenerator. Water from the reactor and the water that is turned into
steam are in separate systems and do not mix.
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In Boiling Water Reactors (also known as BWRs), the waterheated by fission actually boils and turns into steam to turnthe turbine generator. In both PWRs and BWRs, the steam isturned back into water and can be used again in the
process.
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Meltdowns
Three Mile Island 1979
Chernobyl 1986 Fukushima 2011
Waste disposal
Nuclear waste disposal will cost US $96B Waste will remain radioactive for 10,000
years
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Little polution
Power plants on coal emit more radiation
into the air than a nuclear power plant Reliability
Low consumption of fuel
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The end.