Energy Generation Comparison 6 kg of thorium metal in a liquid-fluoride reactor has the energy equivalent (66,000 MWhr electrical) of: = 230 train cars.

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Presentation transcript:

Energy Generation Comparison 6 kg of thorium metal in a liquid-fluoride reactor has the energy equivalent (66,000 MW*hr electrical*) of: = 230 train cars (25,000 MT) of bituminous coal or, 600 train cars (66,000 MT) of brown coal, (Source: World Coal Institute)World Coal Institute or, 440 million cubic feet of natural gas (15% of a 125,000 cubic meter LNG tanker), or, 300 kg of enriched (3%) uranium in a pressurized water reactor. *Each ounce of thorium can therefore produce $14,000-24,000 of electricity (at $ /kW*hr)

Energy Extraction Comparison Uranium-fueled light-water reactor: 35 GW*hr/MT of natural uranium 1000 MW*yr of electricity 33% conversion efficiency (typical steam turbine) 3000 MW*yr of thermal energy 32,000 MW*days/tonne of heavy metal (typical LWR fuel burnup) 39 MT of enriched (3.2%) UO 2 (35 MT U) Conversion and fabrication 365 MT of natural UF 6 (247 MT U) 293 MT of natural U 3 O 8 (248 MT U) Thorium-fueled liquid-fluoride reactor: 11,000 GW*hr/MT of natural thorium Conversion to UF MW*yr of electricity 50% conversion efficiency (triple- reheat closed-cycle helium gas-turbine) 2000 MW*yr of thermal energy 914,000 MW*days/MT 233 U (complete burnup) 0.8 MT of 233 Pa formed in reactor blanket from thorium (decays to 233 U) Thorium metal added to blanket salt through exchange with protactinium 0.8 MT of thorium metal 0.9 MT of natural ThO2 Conversion to metal Uranium fuel cycle calculations done using WISE nuclear fuel material calculator:

Waste generation from 1000 MW*yr uranium-fueled light-water reactor Mining 800,000 MT of ore containing 0.2% uranium (260 MT U) Uranium fuel cycle calculations done using WISE nuclear fuel material calculator: Generates ~600,000 MT of waste rock Conversion to natural UF 6 (247 MT U) Generates 170 MT of solid waste and 1600 m 3 of liquid waste Milling and processing to yellowcake—natural U 3 O 8 (248 MT U) Generates 130,000 MT of mill tailings Enrichment of 52 MT of (3.2%) UF 6 (35 MT U) Generates 314 MT of depleted uranium hexafluoride (DU); consumes 300 GW*hr of electricity Fabrication of 39 MT of enriched (3.2%) UO 2 (35 MT U) Generates 17 m 3 of solid waste and 310 m 3 of liquid waste Irradiation and disposal of 39 MT of spent fuel consisting of unburned uranium, transuranics, and fission products.

Waste generation from 1000 MW*yr thorium-fueled liquid- fluoride reactor Mining 200 MT of ore containing 0.5% thorium (1 MT Th) Thorium mining calculation based on date from ORNL/TM-6474: Environmental Assessment of Alternate FBR Fuels: Thorium Generates ~199 MT of waste rock Milling and processing to thorium nitrate ThNO 3 (1 MT Th) Generates 0.1 MT of mill tailings and 50 kg of aqueous wastes Conversion to metal and introduction into reactor blanket Breeding to U233 and complete fission Disposal of 0.8 MT of spent fuel consisting only of fission product fluorides

…or put another way…

Mining waste generation comparison Mining 800,000 MT of ore containing 0.2% uranium (260 MT U) Uranium fuel cycle calculations done using WISE nuclear fuel material calculator: Generates ~600,000 MT of waste rock Conversion to natural UF 6 (247 MT U) Generates 170 MT of solid waste and 1600 m 3 of liquid waste Milling and processing to yellowcake—natural U 3 O 8 (248 MT U) Generates 130,000 MT of mill tailings Mining 200 MT of ore containing 0.5% thorium (1 MT Th) Generates ~199 MT of waste rock Milling and processing to thorium nitrate ThNO 3 (1 MT Th) Generates 0.1 MT of mill tailings and 50 kg of aqueous wastes 1 GW*yr of electricity from a uranium-fueled light-water reactor 1 GW*yr of electricity from a thorium-fueled liquid-fluoride reactor

Operation waste generation comparison Uranium fuel cycle calculations done using WISE nuclear fuel material calculator: 1 GW*yr of electricity from a uranium-fueled light-water reactor 1 GW*yr of electricity from a thorium-fueled liquid-fluoride reactor Enrichment of 52 MT of (3.2%) UF 6 (35 MT U) Generates 314 MT of DUF 6 ; consumes 300 GW*hr of electricity Fabrication of 39 MT of enriched (3.2%) UO 2 (35 MT U) Generates 17 m 3 of solid waste and 310 m 3 of liquid waste Irradiation and disposal of 39 MT of spent fuel consisting of unburned uranium, transuranics, and fission products. Conversion to metal and introduction into reactor blanket Breeding to U233 and complete fission Disposal of 0.8 MT of spent fuel consisting only of fission product fluorides