Patents by Inventor Andrew Lindsay Wallwork

Andrew Lindsay Wallwork has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Nuclear fuel reprocessing
    Patent number: 6623710
    Abstract: A spent fuel reprocessing method including the steps of partitioning U and Pu(III) in a solvent by solvent extraction and subsequently polishing the solvent in a neptunium rejection operation for removing Np therefrom. The solvent obtained from the neptunium rejection operation (the polished solvent or NpA solvent product) is then recycled to a U/Pu partitioning operation. The method enables a reduction in solvent feed and solvent effluent volumes.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: September 23, 2003
    Assignee: British Nuclear Fuels PLC
    Inventors: Emmanuel Gaubert, Gavin Paul Towler, Andrew Lindsay Wallwork
  • Nuclear fuel reprocessing
    Patent number: 6093375
    Abstract: A spent fuel reprocessing method includes at least the formation of an aqueous solution and at least one solvent extraction step. Formohydroxarmic acid is used to reduce any Np(VI) to Np(V) and/or to form a complex with Np(IV). As a result, substantially all the neptunium present is retained in the aqueous phase during solvent extraction.
    Type: Grant
    Filed: August 7, 1998
    Date of Patent: July 25, 2000
    Assignee: British Nuclear Fuels PLC
    Inventors: Robin John Taylor, Iain Stewart Denniss, Andrew Lindsay Wallwork