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Nuclear Reprocessing-Presentation

Nuclear Reprocessing-Presentation - Nuclear Fuel...

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Nuclear Fuel Reprocessing By Daniel Bolgren Jeff Menees
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Goals of the Project 1. Develop a reprocessing technique that can: 1. Reprocess used nuclear fuel. 2. Reduce proliferation concerns. 2. Optimize a reprocessing location using: 1. Current storage location. 2. Transportation feasibility.
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Overview Briefly explain of Nuclear Fission Background of Nuclear Fuel Reprocessing Nuclear Fuel Cycle Alternative Reprocessing Technique Crown Ether Extraction Process Proposed Reprocessing Facility Location optimization Transportation feasibility Long Term Storage Yucca Mountain
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Nuclear Energy
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Nuclear Fuel Bundle
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Nuclear Chain Reaction?
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Fission Products
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Fission Efficiency Neutron
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Reprocessing-Re-using Nuclear Fuel
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Background of Reprocessing Began in 1940’s Fission Byproduct Plutonium Nuclear Weapons Nuclear Proliferation 1977 Presidential Directive Interest in next generation reactors Reprocessed Uranium
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Enrico Fermi
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NUCLEAR FUEL CYCLE
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Nuclear Fuel Cycle Uranium Ore Starting raw material for nuclear fuel Typically contains .05 to .3 wt% U 3 O 8 Available isotopes U 238 and U 235 Approximately 99.28% U 238 and .71% U 235
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Nuclear Fuel Cycle Mined uranium ore is milled to isolate the U 3 O 8 Milling is typically accomplished through chemical leaching Produces Solid U 3 O 8 commonly referred to as “Yellow Cake”
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Nuclear Fuel Cycle Uranium Conversion Required by enrichment facilities Uranium hexafluoride UF 6 Typically enrichment from .71 to 3.5% U 235 depending on reactor specifications. Alternative Uranium Conversion Ceramic Grade Uranium dioxide UO 2 CANDU-Reactors
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Nuclear Fuel Cycle Enrichment Fabrication Enriched Uranium Pellets Generally placed in fuel rods to meet specific core specifications Fuel rod casing Stainless Steel Zirconium Fuel Rod Bundles
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Nuclear Fuel Cycle PWR/BWR most common fuel rod configuration Typically put into bundles of 6 to 8 individual fuel rod assemblies Depending on Energy Production requirements 2 to 6 year life span Fuel rod adjustments Often require adjusting during operation
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Recycle Nuclear Fuel
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Options for “Spent Fuel” Storage Short Term storage Spent Fuel Pool Dry Cask Long Term Storage Yucca Mountain Environmental Concerns Transportation Reprocessing Environmental Concerns Economical-Political Includes Long Term Storage
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