Patents by Inventor Alf I. Jonsson

Alf I. Jonsson 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 with isotopically depleted burnable absorber
    Patent number: 5350542
    Abstract: By using AVLIS or other methods capable of providing a depleted isotopic mixture, troublesome isotopes such as Gd.sup.154, Gd.sup.156 and Er.sup.166 are selectively removed from naturally occurring isotopic mixtures, while avoiding the additional costs associated with complete fractionation of the mixture. Such mixtures can be used to provide a burnable nuclear fuel absorber having a selectively depleted isotope or isotopes. In particular, the invention concerns burnable absorbers containing erbium with a depleted 166 isotope, gadolinium with a depleted 156 isotope or with depleted 154 and 156 isotopes, and methods for making such absorbers.
    Type: Grant
    Filed: June 30, 1993
    Date of Patent: September 27, 1994
    Assignee: Combustion Engineering, Inc.
    Inventors: Leonard N. Grossman, Alf I. Jonsson
  • Nuclear fuel with isotopically depleted burnable absorber
    Patent number: 5250231
    Abstract: By using AVLIS or other methods capable of providing a depleted isotopic mixture, troublesome isotopes such as Gd.sup.154, Gd.sup.156 and Er.sup.166 are selectively removed from naturally occurring isotopic mixtures, while avoiding the additional costs associated with complete fractionation of the mixture. Such mixtures can be used to provide a burnable nuclear fuel absorber having a selectively depleted isotope or isotopes. In particular, the invention concerns burnable absorbers containing erbium with a depleted 166 isotope, gadolinium with a depleted 156 isotope or with depleted 154 and 156 isotopes, and methods for making such absorbers.
    Type: Grant
    Filed: September 18, 1991
    Date of Patent: October 5, 1993
    Assignee: Combustion Engineering, Inc.
    Inventors: Leonard N. Grossman, Alf I. Jonsson