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Sodium-Cooled Fast Reactor

Sodium-Cooled Fast Reactor. Thorium Based Metallic Closed Fuel Cycle. What is DCTRU?. DCTRU = Dreams Come TRU, where TRU = Transuranics Current Generation II Light Water Reactors (LWRs) utilize a thermal spectrum of neutrons to induce fission in a 238 U/ 235 U based fuel

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Sodium-Cooled Fast Reactor

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  1. Sodium-Cooled Fast Reactor Thorium Based Metallic Closed Fuel Cycle Fynan, Mar, Sirajuddin

  2. What is DCTRU? • DCTRU = Dreams Come TRU, where TRU = Transuranics • Current Generation II Light Water Reactors (LWRs) utilize a thermal spectrum of neutrons to induce fission in a 238U/235U based fuel • These reactors provide approximately 20% of the United States’ power generation • A typical LWR produces on the order of 25-30 tonnes of nuclear waste per year. 113 nuclear power plants in the US ≈ 4000 tonnes per year. Currently, over 115,000 tonnes of nuclear waste is being stored in repositories in the US. Transuranics make up the majority of waste produced via fission reactions in LWRs • DCTRU lends a compassionate and understanding ear to: • The environment • Safety concerns • Economic and ethical electricity production • Future generations’ stewardship burden (e.g. Yucca Mountain [YM]) • Decomissioning of nuclear arms • Global Nuclear Energy Partnership (GNEP) and the Generation IV Technology Roadmap has selected SFR as a candidate for further research and development as part of the Advanced Fuel Cycle Initiative (AFCI) Fynan, Mar, Sirajuddin

  3. SFR Uses Today’s Nuclear Waste as Tomorrow’s Fuel • GNEP, AFCI, and DCTRU aim to provide for cleaner, safer, more recyclable energy for the world of tomorrow. • SFR accomplishes these goals by utilizing a fast neutron spectrum to induce fissions in Transuranics (TRUs), and minor actinides (MAs) produced as waste by present LWRs. • Furthermore, using 232Th as a host fuel, Generation IV reactors such as SFR will take advantage of thorium’s high burnup to reduce future waste production while accounting for the energy needs of future generations. • The SFR has an inherently modular design, for flexible application • The SFR is proliferation resistant • Passive safety features of the SFR include : • Large boiling margin • Lack of corrosive effects • Low operating pressure (~ 1 atm) • Overall simplicity of design • Sodium pool design • Subterranean core • The reactor produces economically competitive power Fynan, Mar, Sirajuddin

  4. Design • Sodium-Cooled Fast Reactor with target power output of 1000 MWt • Small, pancake core • (Thorium-Uranium-Plutonium)Zr fuel with tandem use of a targeted actinide mechanism • Fuel pin assembly • Sodium coolant pool • Austenitic stainless steel used for structural and piping materials • Intermediate heat exchangers (IHX) • Fast neutron spectrum for reduction of Plutonium and minor actinides (MAs) Fynan, Mar, Sirajuddin

  5. Modes of Analysis and Modeling • MC2 for lattice physics calculations • Rebus3 for multi-group diffusion analysis Fynan, Mar, Sirajuddin

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