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Nuclear energy

Thorium fuel has risks

Nature volume 492, pages 3133 (06 December 2012) | Download Citation

Simple chemical pathways open up proliferation possibilities for the proposed nuclear 'wonder fuel', warn Stephen F. Ashley and colleagues.

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  1. 1.

    International Atomic Energy Agency. IAEA Safeguards Glossary 2001 Edition (IAEA, 2002)

  2. 2.

    Managing the Uranium-233 Stockpile of the United States (Institute for Policy Studies, 2012); available at .

  3. 3.

    , , , & Separation and Purification of a Gram of Protactinium-233 Atomic Energy Commission Report IDO 17007 (1964).

  4. 4.

    & J. Inorg. Nucl. Chem. 3, 229–232 (1956).

  5. 5.

    , & Molten-Salt Breeder Reactor Fuel Processing Oak Ridge National Laboratory Technical Report No. CONF-720522-3 (1972).

  6. 6.

    , , , & Nucl. Appl. Technol. 8, 170–178 (1970).

  7. 7.

    , & US Patent 3,577,225 (1971).

  8. 8.

    et al. J. Fluorine Chem. 130, 11–17 (2009).

  9. 9.

    , & US Patent 3,495,975 (1970).

  10. 10.

    International Atomic Energy Agency. Model Protocol Additional to the Agreement(s) between State(s) and the International Atomic Energy Agency for the Application of Safeguards INFCIRC/540/Corr (IAEA, 1997).

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Author information


  1. Stephen F. Ashley is a research associate in nuclear engineering in the Department of Engineering, University of Cambridge, Cambridge, UK.

    • Stephen F. Ashley
  2. Geoffrey T. Parks is a senior lecturer in nuclear engineering in the Department of Engineering, University of Cambridge, Cambridge, UK.

    • Geoffrey T. Parks
  3. William J. Nuttall is professor of energy in the Department of Design, Development, Environment and Materials, The Open University, Milton Keynes, UK.

    • William J. Nuttall
  4. Colin Boxall is director of Energy Lancaster, Engineering Department, Lancaster University, Lancaster, UK.

    • Colin Boxall
  5. Robin W. Grimes is director of the Centre for Nuclear Engineering, Imperial College London, London, UK.

    • Robin W. Grimes


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Corresponding author

Correspondence to Stephen F. Ashley.

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