Patents by Inventor Bo Fredin

Bo Fredin 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 assembly
    Patent number: 6275557
    Abstract: The present invention relates to a fuel assembly with a substantially square cross section for a light-water reactor. The light-water reactor comprises a plurality of fuel rods (4) extending between a top tie plate (5) and a bottom tie plate (6). A fuel rod (4) comprises a cladding tube (7a) with a first and a second end which surround a column with fissionable material (7b). According to one aspect of the invention, at least one fuel rod (4) is provided with an axial gap (19) in the fissionable material (7b), such that fissionable material (7b) is arranged on both sides of the axial gap (19) in the fuel rod (4).
    Type: Grant
    Filed: February 11, 1999
    Date of Patent: August 14, 2001
    Assignee: ABB Atom AB
    Inventors: Olov Nylund, Bo Fredin, Sture Helmersson
  • NUCLEAR FUEL ASSEMBLY
    Publication number: 20010001618
    Abstract: The present invention relates to a fuel assembly with a substantially square cross section for a light-water reactor. The light-water reactor comprises a plurality of fuel rods (4) extending between a top tie plate (5) and a bottom tie plate (6). A fuel rod (4) comprises a cladding tube (7a) with a first and a second end which surround a column with fissionable material (7b). According to one aspect of the invention, at least one fuel rod (4) is provided with an axial gap (19) in the fissionable material (7b), such that fissionable material (7b) is arranged on both sides of the axial gap (19) in the fuel rod (4).
    Type: Application
    Filed: February 11, 1999
    Publication date: May 24, 2001
    Inventors: OLOV NYLUND, BO FREDIN, STURE HELMERSSON
  • Fuel assembly having water passageway in channel wall
    Patent number: 4526746
    Abstract: Fuel assembly having square cross-section and a plurality of tube elements (7,8) arranged in a square reactor lattice, at least one of said tube elements being water tubes (8) and a predominant number being fuel rods (7). Each fuel channel wall has a hollow projection (9) lying in a vertical mid-plane. The number of tube elements between two projections (9) lying in the same mid-plane is smaller than nine and greater than two. A plurality of rows of nine tube elements (7, 8) are arranged in parallel with each of the mid-planes.
    Type: Grant
    Filed: April 7, 1982
    Date of Patent: July 2, 1985
    Assignee: AB Asea-Atom
    Inventor: Bo Fredin
  • Fuel assembly
    Patent number: 4478786
    Abstract: A boiling water reactor fuel assembly is provided with an elongated, vertical stiffening device having four stiffening wings which are each attached to a wall of the fuel box. Each stiffening wing has at least one vertically directed passageway for water.
    Type: Grant
    Filed: March 3, 1981
    Date of Patent: October 23, 1984
    Assignee: AB Asea-Atom
    Inventors: Ingmar Andersson, Bo Borrman, Bo Fredin, Olov Nylund
  • Absorber member for mounting in the lattice of a boiling water reactor
    Patent number: 4400347
    Abstract: An elongated absorber plate, which is stationarily mounted in a gap between two fuel assemblies in a reactor core, comprises a plurality of absorber channels which are filled with a burnable absorber material. The channels (5b) are formed by welding to each other two confronting sheet elements (2b, 3b), of which at least one is corrugated.
    Type: Grant
    Filed: April 29, 1981
    Date of Patent: August 23, 1983
    Assignee: AB Asea Atom
    Inventors: Bo Fredin, Olov Nylund