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Electric Power Generation and the Environment Health Physics Society Power Reactor Section
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History Of Electricity Static Electricity – Ancient Greeks Franklin Invents Lightning Rods - 1752 Faraday Discovers Electromagnetic Induction – early 1800’s Edison Invents the Light Bulb and Generating Stations in NYC – 1882 Tesla Invents Alternating Current Motor for Westinghouse - 1888
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Faraday’s Law Moving a magnet through a wire loop produces an electric current. Called “electromagnetic” induction.
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Generator A generator converts mechanical energy into electrical energy
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North America At Night
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Earth At Night
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U.S. Sources Today Source: EIA - Updated 11/03 (2002)
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Future Energy Need
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Sources Tomorrow (2025) ?
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Energy Policy Goals Increase energy supply Optimize available resources Develop new technology Limiting environmental impact
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A Question Of Balance
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Pros & Cons COAL HYDRO NATURAL GAS SOLAR & WIND cheap and abundant but source of greenhouse gases clean but seasonal and no new sources cleaner than coal but limited supply renewable but expensive, low energy density, and intermittent
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Pros & Cons NUCLEAR high energy density no air pollution reliable fuel supply but what about safety, security, and waste?
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High Energy Density Each person in the United States uses either: 4 tons of coal or a few ounces of uranium 1 pellet = 150 gallons gasoline 1780 pounds coal 16,000 ft 3 natural gas 2.5 tons wood
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No Air Pollution
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Global Nuclear Power 442 Nuclear Plants Worldwide 25% in the United States Strong growth internationally, China is the fastest growing maket Source: International Atomic Energy Agency
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103 Nuclear Power Reactors
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But What About… Safety, Security, and Waste? Designed, Constructed, and Operated for Safety Robust Security Used Fuel Storage at Yucca Mountain
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Safety By Design: Low “Enrichment” Fission “chain reaction”: E = m * c 2 U-235 atoms fission. 5% in fuel, 95% in bombs.
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Safety By Design: Fuel Rods The uranium fuel is made of solid ceramic pellets. The fuel pellets are sealed inside zirconium alloy rods that are about 13’ long. ~236 rods in each assembly ~200 assemblies in the reactor core
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Safety By Design: Reactor Vessel Typical values: Weight: 400 tons Thickness: 8 inches Fuel Assemblies (Core)
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Safety By Design: PWR Containment Initial Construction Completed Concrete Dome
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Multiple Layers of Protection
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Nuclear Plant Security Areas Vital Area Owner Controlled Area Protected Area
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Active Vehicle Barrier System
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Intrusion Detection CCTV on poles Delay Fence Intrusion Detection Perimeter checks Roving Patrols
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Defensive Fighting Position
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Fuel Assemblies Cool In Pools
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Temporary Dry Storage On Site
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Yucca Mountain Site
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Careers in Nuclear Design Next Generation Power Plants Equipment Reliability Transportation Casks Engineering Electrical and Mechanical Instrumentation and Control Nuclear
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Careers in Nuclear Health Physics Environmental Operations Regulations Chemistry Corrosion Protection
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Websites Nuclear Regulatory Commission www.nrc.gov Nuclear Energy Institute www.nei.org Health Physics Society www.hps.org
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Thanks …for your interest and patience !
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