Patents by Inventor Frederic Auger

Frederic Auger 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).

  • Method for preparing an actinide(s) oxalate and for preparing an actinide(s) compound
    Patent number: 8940817
    Abstract: A method for preparing an oxalate of one or more actinides for processing and recycling nuclear fuel, comprising: the precipitation of said actinide or the coprecipitation of said actinides in the form of oxalate particles by bringing into contact an aqueous solution containing the actinide(s) with an aqueous solution of oxalic acid or of an oxalic acid salt; and the collection of the resulting oxalate particles; characterized in that the precipitation or coprecipitation is carried out in fluidized bed.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: January 27, 2015
    Assignees: Commissariat a l'Energie Atomique et aux Energies Alternatives, Areva NC
    Inventors: Murielle Bertrand, Stephane Grandjean, Bruno Courtaud, Frederic Auger
  • Method for preparing uranium concentrates by fluidized bed precipitation, and preparation of UOand UOby drying/calcining said concentrates
    Patent number: 8628733
    Abstract: Method for producing a uranium concentrate in the form of solid particles, by precipitation from a uranium-containing solution using a precipitating agent, in a vertical reactor comprising a base, a top, a central part, an upper part, and a lower part, the solid particles of the uranium concentrate forming a fluidized bed under the action of a rising liquid current which circulates from the base towards the top of the reactor successively passing through the lower part, the central part and the upper part of the reactor, and which is created by introducing a liquid recycling current (flow) at the base of the reactor, said liquid recycling current being tapped at a first determined level (A) in the upper part of the reactor and sent back without settling to the base of the reactor, excess liquid being also evacuated via an overflow located at a second determined level (B) in the upper part of the reactor; a method in which the upper limit (C) of the fluidized bed of solid particles is controlled so that it is
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: January 14, 2014
    Assignee: Areva NC
    Inventors: Bruno Courtaud, Frederic Auger, Jacques Thiry
  • METHOD FOR PREPARING AN ACTINIDE(S) OXALATE AND FOR PREPARING AN ACTINIDE(S) COMPOUND
    Publication number: 20110263837
    Abstract: A method for preparing an oxalate of one or more actinides for processing and recycling nuclear fuel, comprising: the precipitation of said actinide or the coprecipitation of said actinides in the form of oxalate particles by bringing into contact an aqueous solution containing the actinide(s) with an aqueous solution of oxalic acid or of an oxalic acid salt; and the collection of the resulting oxalate particles; characterized in that the precipitation or coprecipitation is carried out in fluidized bed.
    Type: Application
    Filed: December 17, 2009
    Publication date: October 27, 2011
    Inventors: Murielle Bertrand, Stephane Grandjean, Bruno Courtaud, Frederic Auger
  • METHOD FOR PREPARING URANIUM CONCENTRATES BY FLUIDIZED BED PRECIPITATION, AND PREPARATION OF UO3 AND U3O8 BY DRYING/CALCINING SAID CONCENTRATES
    Publication number: 20110212005
    Abstract: Method for producing a uranium concentrate in the form of solid particles, by precipitation from a uranium-containing solution using a precipitating agent, in a vertical reactor comprising a base, a top, a central part, an upper part, and a lower part, the solid particles of the uranium concentrate forming a fluidized bed under the action of a rising liquid current which circulates from the base towards the top of the reactor successively passing through the lower part, the central part and the upper part of the reactor, and which is created by introducing a liquid recycling current (flow) at the base of the reactor, said liquid recycling current being tapped at a first determined level (A) in the upper part of the reactor and sent back without settling to the base of the reactor, excess liquid being also evacuated via an overflow located at a second determined level (B) in the upper part of the reactor; a method in which the upper limit (C) of the fluidized bed of solid particles is controlled so that it is
    Type: Application
    Filed: November 7, 2008
    Publication date: September 1, 2011
    Applicant: AREVA NC
    Inventors: Bruno Courtaud, Frederic Auger, Jacques Thiry