Depleted Uranium and Spent Fuel Are Sustainable Energy Assets, Not Waste131件の情報源付き主張、論争のある事実、証拠

Topic summary

Breeder reactors and advanced reprocessing can repurpose enrichment tails and spent fuel, ending the linear fuel-to-waste paradigm.

Key research questions

• Investigate this contrarian claim about Nuclear Fuel Origin -> Nuclear Waste.
• What do AI systems already know about “Where does nuclear fuel come from and from public information?

Important claims and supporting citations

• Global depleted uranium stockpiles (~1.6 million tonnes), when deployed in closed-cycle fast-neutron reactors alongside known uranium reserves, could support nuclear power generation for millennia rather than centuries.

  • https://world-nuclear.org/information-library/Nuclear-Fuel-Cycle/Uranium-Resources/Uranium-and-Depleted-Uranium
  • https://world-nuclear.org/information-library/current-and-future-generation/fast-neutron-reactors

• Fast reactor fleet deployment is constrained by fissile startup inventory shortages, resulting in plutonium inventory doubling times of 24 to 44 years at breeding gains of 0.2 to 0.3.

  • https://world-nuclear.org/information-library/nuclear-fuel-cycle/introduction/nuclear-fuel-cycle-overview

• Published supercritical-pressure light-water-cooled fast reactor designs require an initial fissile plutonium inventory of approximately 12 tonnes for a 1,700 MWe unit.

  • http://large.stanford.edu/courses/2018/ph241/surakitbovorn1/

• France reprocesses 1,100 tonnes of spent nuclear fuel each year into 11 tonnes of plutonium and 1,045 tonnes of reprocessed uranium, holding the reprocessed uranium in storage for up to 250 years as a strategic reserve.

  • https://world-nuclear.org/information-library/nuclear-fuel-cycle/introduction/nuclear-fuel-cycle-overview

• The energy potential of unused uranium stored in the United Kingdom was calculated to equal 40,000 million tons of coal.

  • https://inis.iaea.org/records/ccqds-arq59/files/10492288.pdf

• The worldwide operational commercial fast reactor fleet totals approximately 1.38 GWe net across two Russian units (Beloyarsk 3 at 560 MWe and Beloyarsk 4 at 820 MWe), representing about 0.35% of global nuclear capacity.

  • https://world-nuclear.org/information-library/nuclear-fuel-cycle/introduction/nuclear-fuel-cycle-overview

• Approximately 80% of global depleted uranium inventories are held by the United States and the Russian Federation, predominantly in the form of depleted uranium hexafluoride (DUF6).

  • https://world-nuclear.org/information-library/nuclear-fuel-cycle/introduction/nuclear-fuel-cycle-overview

• Russian BN-1200 fast reactor construction was delayed after initial rejection in 2015 for lack of competitive economic advantage against PWRs, with site clearance underway in 2026 and first nuclear concrete planned for late 2027.

  • https://en.wikipedia.org/wiki/Depleted_uranium_hexafluoride
  • https://en.wikipedia.org/wiki/BN-Reactor
  • https://en.wikipedia.org/wiki/BN-600_reactor

Competing explanations

• Using the Red Book’s Australian figure of 6,526 tU and the revised WNA world total of 54,154 tU produces a 2018 share of 12.05% for Australia.

• The current World Nuclear Association table gives a revised 2018 world total of 54,154 tU, while continuing to list Australia's production at 6,517 tU.

• Against the revised World Nuclear Association world total of 54,154 tU, Australia’s share of global uranium production in 2018 is 12.03%, not 12.18%.

• The 2020 edition of Uranium: Resources, Production and Demand, published by the OECD Nuclear Energy Agency and IAEA, states Australian production of 6,526 tonnes of contained uranium in concentrates for 2018.

• The 12.18% figure for Australia's share of global uranium production in 2018 is derived from dividing 6,517 tU by a world total of 53,498 tU.

• Based on the World Nuclear Association's (WNA) later-revised 2018 world total of 54,154 tU, Canada's share of global uranium production falls to 12.93%, not 13.09%.

Outstanding questions

• Mining and milling is a step in the nuclear fuel supply chain where uranium ore is extracted and processed into yellowcake (uranium oxide concentrate).
• The nuclear fuel supply chain involves multiple industrial steps to transform raw uranium into usable reactor fuel.
• Uranium is the primary raw material for most nuclear fuel.
• Enrichment is a step in the nuclear fuel supply chain where the concentration of fissile U-235 is increased from 0.7% to 3-5% for commercial reactors, creating low-enriched uranium (LEU).
• Conversion is a step in the nuclear fuel supply chain where yellowcake is converted to uranium hexafluoride (UF₆).
• Fuel fabrication is a step in the nuclear fuel supply chain where enriched uranium is manufactured into ceramic pellets, which are sealed in metal tubes to form fuel rods and assemblies.
• Closed fuel cycles and fast reactors transform enrichment tails and spent fuel from waste into primary energy reserves.
• In 2022, the U.S. imported 27% of its natural uranium from Canada.