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Thorium Nuclear Reactors
Alexander Grover: BSNE/MBA
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Overview Nuclear Power Key Concepts Thorium vs. Uranium Pros & Cons
Examples of Working Thorium Reactors Designs PWR vs. BWR Pebble Bed LFTR (Liquid Fluoride Thorium Reactor) Portable and Compact Designs Desalinization Waste Management Glass Vitrification Long Term Storage Politics & Organization Conclusions Another idea that just popped into my head was what kind of organization could or should we form to pursue this? University? A corporation? A utility company? Who currently works on or produces this technology in the US. I believe that where ever we settle I think an emboldened state government would give us a lot of leeway to pursue this. What are the current restrictions to this technology?
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Nuclear Power Key Concepts
Fission: Energy created by splitting atoms Sub-Critical Reaction Critical Reaction Super Critical Reaction Process: Splitting atoms creates heat which boils water which in turn creates steam to run a turbine which in turn creates electricity . Contamination vs. Radiation: Source of Radiation Types of Radiation Contamination Exposure Inverse Square Law I2 = I / d2 Shielding: Using materials to protect against radiation : Water & Concrete Lead Iron
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Thorium vs. Uranium Abundance Efficiency Comparison Thorium Uranium
U-238/U-235 Abundance Occurs Everywhere Rare as Gold Efficiency Ca. 99% of fuel consumed in LFTR (Liquid Fluoride Th Reactor) > 1% fuel consumed Working Examples A few prototypes Working examples are everywhere Military and Civilian Weapons Proliferations No Yes Enrichment
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Pros & Cons of MSR & LFTR PRO CON Significantly Higher Efficiency
Commercially unproven Does not Operate under Pressure Chemical intensive Fuel can not be used for weapons Molten salts pose corrosion issues
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Working Examples of Th Reactors
Oak Ridge National Laboratory – Only in an Experimental State: Molten Salt Test Reactor Experiment: Nuclear Powered Aircraft Engine Experiment India: R&D Efforts
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Designs PWR vs. BWR Pebble Bed LFTR: GEN4 Energy
Single Loop vs. Double Loop Most Common Designs in Use Westinghouse, GE and US Navy Pebble Bed Allows for online refueling Modular Design LFTR: GEN4 Energy
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LFTR
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Pebble Bed
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Desalinization 783 million people in the world do not have access to safe water. This is roughly 11% of the world's population. (WHO/UNICEF) Excess Heat from Nuclear Power Generation Can Make Fresh Water US Navy Already uses excess heat to desalinize water Thorium Reactors could bring water to desserts
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Waste Management French Model: Long Term Disposal Risk Management
Spent Fuel Reprocessing recovers 96% of the waste Glass Vitrification Long Term Disposal Abondened Risk Management Creates Plutonium – This why we don’t do this in the USA 14 cu ft. of waste per Reactor per year Trade-offs Pellet of nuclear fuel vs. Trainloads of coal Thorium Reactors can burn up current Nuclear Waste
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Why Aren’t we doing this?
Politics: U.S. policy: a state of perpetual indecision Lack of Education: Roots back to Politics & American inability to weigh decisions and evaluate trade-offs
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Conclusions Thorium is viable R&D Needed Molten Salts in Reality
Pebble Bed Thorium Design is Ideal Not only solves energy problem but also climate change and water problems
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