npp, nuclear power plant,
DESCRIPTION
Nuclear Power Plant, Conventional sources, ReactorTRANSCRIPT
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Nuclear Power PlantsSeventeen Nuclear ReactorsProduction – 4120.00MWEnergy from atomic nuclei via controlled
nuclear reactions(Fission) Uranium-235 and plutonium-239.
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Nuclear Fission
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Advantages of NPPFuel is inexpensive and easy to transport.Energy generated is very efficient and and
the remaining waste is compact.Nuclear reactors need little fuel.Amount of waste produced is much smaller
than that produced in coal burning plantChance of a nuclear accident is 1 in 250
years.Clean source of energy.
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DisadvantagesActual cost of producing energy is more
because of containment, radioactive waste storage system
The mining of the fuel itself can cause serious problems
The meltdown of reactor can cause serious disaster.
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NPP Using A Heat Exchanger
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PWR – Pressurized Water Reactor
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Main Components Of A ReactorFuel Rods – Tube filled with pellets of UraniumShielding - Protection against alpha, beta and Gamma
RaysModerator - Slow down the neutron release(Heavy
water, Beryllium, Graphite)Control Rods - neutron absorbing material(boron
Carbide, cadmium)Coolant - To transfer the heat generated inside the
reactor to a heat exchanger for utilization of power generation
Steam Separator - steam from the heated coolant is fed to the turbines to produce electricity from generator.
Containment - concrete lined cavity acting as a radiation shield
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Boiling Water Reactor (BWR)
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Heavy Water Reactor(CANDU)
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Gas-Cooled Reactor
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Selection of SiteAvailability of water - NPP requires ample
amount of water for cooling and steam generation.
Disposal of Waste – Dangerous waste/residue obtainedIt needs to be disposed deep under the ground in sea so that radioactive effect is eliminated.
Away from populated area – For health safetyNearest to the load centre Other Factors – Accessibility to the road and rail
are general considerations.