Patents by Inventor Yuriy Aleshin

Yuriy Aleshin 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).

  • Publication number: 20070165766
    Abstract: The present invention provides novel fuel assemblies for use with PWR nuclear reactors and power plants, and in particular, VVER nuclear reactors. The fuel assemblies offer enhanced structural stability, skeletal rigidity, and distortion (bow and twist) resistance to support high burn-up fuel management. Each fuel assembly may include a plurality of fuel rods, a plurality of control rods and guide thimbles, at least one instrumentation tube, and a plurality of grids. At least one fuel rod is replaced with a structural support replacement rod made from zirconium (Zr) alloy, stainless steel, or any other suitable material. The structural support replacement rod may be hollow or solid. The structural support replacement rods are preferably disposed at or about the periphery, and in some cases, the corners of the geometric array, which is preferably a hexagon or square.
    Type: Application
    Filed: January 13, 2006
    Publication date: July 19, 2007
    Inventors: Yuriy Aleshin, James Sparrow, Keith Drudy
  • Publication number: 20060222140
    Abstract: In a nuclear reactor fuel assembly structured to support at least one non-linear fuel rod, the nuclear reactor fuel assembly includes at least two support grids, a first support grid and a second support grid structured to support at least one fuel rod in a non-linear shape. Each support grid has a plurality of generally square cells and wherein the cells on the first support grid and the second support grid are generally vertically aligned. Each cell has a first side, a second side, a third side, and a fourth side. Each cell further has protrusions extending from each the cell sides, wherein the protrusions are selected from the group including a spring, a dimple or an extended dimple. A spring is always disposed opposite of a dimple or an extended dimple. The first support grid includes at least one cell having an extended dimple extending from at least one cell side.
    Type: Application
    Filed: April 4, 2005
    Publication date: October 5, 2006
    Inventors: Yuriy Aleshin, James Sparrow
  • Patent number: 6738447
    Abstract: A high energy absorption top nozzle for a nuclear fuel assembly that employs an elongated upper tubular housing and an elongated lower tubular housing slidable within the upper tubular housing. The upper and lower housings are biased away from each other by a plurality of longitudinally extending springs that are restrained by a longitudinally moveable piston whose upward travel is limited within the upper housing. The energy imparted to the nozzle by a control rod scram is mostly absorbed by the springs and the hydraulic affect of the piston within the nozzle.
    Type: Grant
    Filed: May 22, 2003
    Date of Patent: May 18, 2004
    Assignee: Westinghouse Electric Company LLC
    Inventors: James A. Sparrow, Yuriy Aleshin, Aleksey Slyeptsov