7.3 nuclear energy. parts of an atom subatomic particles –proton (+) –neutron 0 –electron (-)
TRANSCRIPT
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7.3 Nuclear Energy
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Parts of an Atom
• Subatomic particles– Proton (+)– Neutron 0– Electron (-)
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Uranium
• Element
• Heavy Metal
• Silver and lustrous
• It tarnishes slowly in air
• Reacts with boiling water
Uranium ore – rocks + metal
Pure Uranium Metal
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Protons= 92
Neutrons = 146
Electrons = 92
Uranium Atom
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Isotope
• Atom lose or gain neutrons
• Changes the mass of an atom
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Nuclear Fission
• Splitting the atom by the breaking up of nuclei
• Releases energy• Nuclear power plants• Atomic bombs•
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Radioactive
• Gives off energy
• Emit radiation
• Alpha rays
• Beta rays
• Gamma rays
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Uranium Mine
• Dig for uranium ore
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Uranium Mill
• Uranium ore (rock) is processed
• Pure metal is extracted from the rock
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Tailings
• Debris produced by mining• If these uranium tailings are
left on the surface and allowed to dry out
• The radioactive sand can be carried great distances by the wind, entering the food chain and bodies of water.
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Nuclear Power Plant
• Converts uranium metal by fission into electricity
http://www.youtube.com/watch?v=igf96TS3Els
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Nuclear Reactor
• Site of fission – splits uranium
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Fuel Rod
• Rods that contain pellets of uranium
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Control Rod
• Used to “control” the reaction
• Keeps the reactor safe
• Absorbs neutrons
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Core
• Portion of a nuclear reactor containing the nuclear fuel components where the nuclear reactions take place
http://www.youtube.com/watch?v=VrhzkoNU84g
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Chain Reaction
• A process in which neutrons released in fission produce an additional fission in at least one further nucleus.
• This nucleus in turn produces neutrons, and the process repeats.
• The process may be controlled (nuclear power)
• or uncontrolled (nuclear weapons).
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Meltdown
• Melting of the core
• Three Mile Island, PA, USA• http://www.youtube.com/watch?v=afdkyvSBehw
• Chernobyl, Russia• http://www.youtube.com/watch?v=rvAJ_u3Q0Hw
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Nuclear Waste
• Radioactive Waste
• Used fuel rods stored in sealed containers
http://www.youtube.com/watch?v=omXT5slKHGs&feature=related
http://www.youtube.com/watch?v=jHjWttUqAdk
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Effects of Uranium Radiation
• The effects of the uranium war came home in the bodies of the veterans that participated in the fist war of Golf
• Soldiers transmitted to their women the destructives genetic effects in the “ardent sperm”
• Women passed it to their children that were born with no arms and other mutations.
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Nuclear Depletion
• Small amounts of uranium in the environment
• Bad effects on health and environment
http://www.youtube.com/watch?v=L_RqK_tpkBU
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• Tons of uranium has fallen over Iraq and Afghanistan.
• The effects of the metal powder deployed on the winds, the sand storms, the water, the soil and the living creatures affect also a big region that is breathing particles of uranium in Iran, Pakistan, Turkey, Turkmenistan, Uzbekistan, Russia, Georgia, Azerbaijan, Kazakhstan, China, India, Saudi Arabia, Syria, Lebanon, Palestine, and Israel.
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Leukemia
• Cancer of blood cells• Fatigue • Malaise (vague feeling of bodily discomfort) • Abnormal bleeding • Excessive bruising • Weakness • Reduced exercise tolerance • Weight loss • Bone or joint pain • Infection and fever • Abdominal pain or "fullness" • Enlarged spleen, lymph nodes, and liver