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Chernobyl’s political fallout
• Stimulated Gorbachev’s glasnost (openness)
• Stimulated nationalism in Ukraine, Belarus, and other republics that lost clean-up workers.
• Growth of environmental opposition
• Questioning of the heart of technocratic power– Soviet leaders were engineers, not lawyers– USSR collapsed within 5 years.
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Radiation and Health
• Health effects as a result of radiation exposure:
-increased likelihood of cancer
-birth defects including long limbs, brain
damage, conjoined stillborn twins
-reduced immunity
-genetic damage
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3.5 million sick,
one/third of them children
8,000 deaths in 14 years
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“It Can’t Happen Here”
• U.S. reaction to Chernobyl, 1986– Blamed on Communism, graphite reactor
• Also Soviet reaction to Three-Mile Island, 1979– Blamed on Capitalism, pressurized-water reactor
• No technology 100% safe– Three-Mile Island bubble almost burst
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Health around TMI
• In 1979, hundreds of people reported nausea, vomiting, hair loss, and skin rashes. Many pets were reported dead or showed signs of radiation
• Lung cancer, and leukemia rates increased 2 to 10 times in areas within 10 miles downwind
• Farmers received severe monetary losses due to deformities in livestock and crops after the disaster that are still occurring today.
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Plants near TMI
-lack of chlorophyll
-deformed leaf patterns
-thick, flat, hollow stems
-missing reproductive parts
-abnormally largeTMI dandelion leaf at rightschool.edhole.com
Animals Nearby TMI• Many insects
disappeared for years.
– Bumble bees, carpenter bees, certain type caterpillars, or daddy-long-leg spiders
– Pheasants and hop toads have disappeared.
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Nuclear reaction
• Chain reaction occurs when a Uranium atom splits
• Different reactions– Atomic Bomb in a split second– Nuclear Power Reactor more controlled, cannot
explode like a bomb
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History of nuclear power
1938– Scientists study Uranium nucleus
1941 – Manhattan Project begins
1942 – Controlled nuclear chain reaction
1945 – U.S. uses two atomic bombs on Japan
1949 – Soviets develop atomic bomb
1952 – U.S. tests hydrogen bomb
1955 – First U.S. nuclear submarineschool.edhole.com
“Atoms for Peace”
Program to justify nuclear technology
Proposals for power, canal-building, exports
First commercial power plant, Illinois 1960
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• The energy in one pound of highly enriched Uranium is comparable to that of one million gallons of gasoline.
• One million times as much energy in one pound of Uranium as in one pound of coal.
Economic advantages
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Emissions Free
• Nuclear energy annually prevents– 5.1 million tons of sulfur– 2.4 million tons of nitrogen oxide– 164 metric tons of carbon
• Nuclear often pitted against fossil fuels– Some coal contains radioactivity– Nuclear plants have released low-level radiation
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Early knowledge of risks
• 1964 Atomic Energy Commission report on possible reactor accident
– 45,000 dead– 100,000 injured– $17 billion in damages– Area the size of Pennsylvania contaminated
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Nuclear power around the globe
• 17% of world’s electricity from nuclear power – U.S. about 20% (2nd largest source)
• 431 nuclear plants in 31 countries – 103 of them in the U.S.– Built none since 1970s (Wisconsin as leader). – U.S. firms have exported nukes.– Push from Bush/Cheney for new nukes.
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Countries Generating Most Nuclear Power
Country Total MW
USA 99,784
France 58,493
Japan 38,875
Germany 22,657
Russia 19,843
Canada 15,755
Ukraine 12,679
United Kingdom 11,720
Sweden 10,002
South Korea 8,170school.edhole.com
Nuclear fuel cycle
• Uranium mining and milling
• Conversion and enrichment
• Fuel rod fabrication
• POWER REACTOR
• Reprocessing, or
• Radioactive waste disposal– Low-level in commercial facilities
– High level at plants or underground repositoryschool.edhole.com
Uranium tailingsand radon gas
Deaths of Navajominers since 1950s
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Uranium enrichment
• U-235 – Fissionable at 3%– Weapons grade at 90%
• U-238 – More stable
• Plutonium-239 – Created from U-238; highly radioactive
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Radioactivity of plutonium
Life span of least 240,000 years
Last Ice Age glaciation was 10,000 years ago
Neanderthal Man died out30,000 years ago
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• Largest industrial users of water, electricity– Paducah, KY, Oak Ridge, TN, Portsmouth, OH
• Cancers and leukemia among workers– Fires and mass exposure.– Karen Silkwood at Oklahoma fabrication plant.
• Risk of theft of bomb material.
Risks of enrichmentand fuel fabrication
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Nuclear Reactor Process
• 3% enriched Uranium pellets formed into rods, which are formed into bundles
• Bundles submerged in water coolant inside pressure vessel, with control rods.
• Bundles must be SUPERCRITICAL; will
overheat and melt if no control rods. Reaction converts water to steam, which powers steam turbine
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Technology depends on operators
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Other reactor accidents (besides TMI and Chernobyl)
• 1952 Chalk River, Ontario– Partial core meltdown
• 1957 Windscale, England– Graphite reactor fire contaminates 200 square miles.
• 1975 Browns Ferry, Alabama– Plant caught fire
• 1976 Lubmin, East Germany– Near meltdown of reactor core .
• 1999 Tokaimura, Japan– Nuclear fuel plant spewed high levels of radioactive gas
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United States school.edhole.com
Risk of terrorism(new challenge to industry)
9/11 jetpassed nearIndian Point
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Nuclear Reactor Structure
• Reactor’s pressure vessel typically housed in 8” of steel
• 36” concrete shielding
• 45” steel reinforced concrete
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Breeder reactor “Breeds” plutonium as it operates
Uses liquid sodium metal instead of water for coolant– Could explode if in contact with air or water
• 1966 Fermi, Michigan – Partial meltdown nearly causes evacuation of Detroit
• 1973 Shevchenko, Russia– Breeder caught fire and exploded
• Controversial proposals in Europe, U.S.school.edhole.com
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Reprocessing
• Separates reusable fuel from waste– Large amounts of radioactivity released
• 1960s West Valley, NY – Radiation leaked into Lake Ontario
• 1970s La Hague, France – Released plutonium plumes into air
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Back end: Radioactive wastes• Low-level wastes in commercial facilities
• Spent fuel in pools or “dry casks” by plants
• Nuclear lab wastes– Hanford wastes leaked radiation into Columbia River
• High-level underground repository – Yucca Mountain in Nevada to 2037– Wolf River Batholith in Wisconsin after 2037?– Risks of cracks in bedrock, water seepageschool.edhole.com
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Yucca Mountain
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Transportation risks
• Uranium oxide spills
• Fuel rod spills (WI 1981)
• Radioactive waste risks
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“Mobile Chernobyl”to Yucca Mtn.
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Kyshtym waste disaster, 1957
– Explosion at Soviet weapons factory forces evacuation of over 10,000 people in Ural Mts.
– Area size of Rhode Island still uninhabited; thousands of cancers reported
Orphans
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Radioactive Waste Recycling
• Disposal of radioactive waste from nuclear power plants and weapons facilities by recycling it into household products.
• In 1996, 15,000 tons of metal were received by the Association of Radioactive Metal Recyclers . Much was recycled into products without consumer knowledge.
• Depleted Uranium munitions for military.
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• Nuclear energy has no typical pollutants or greenhouse gasses
• Nuclear waste contains high levels of radioactive waste, which are active for hundreds of thousands of years.
• The controversy around nuclear energy stems from all parts of the nuclear chain.
Summary
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