Patents Assigned to NUS Corporation
  • Patent number: 5765965
    Abstract: An apparatus for constructing a subsurface containment barrier under a waste site disposed in soil is provided. The apparatus uses a reciprocating cutting and barrier forming device which forms a continuous elongate panel through the soil having a defined width. The reciprocating cutting and barrier forming device has multiple jets which eject a high pressure slurry mixture through an arcuate path or transversely across the panel being formed. A horizontal barrier can be formed by overlapping a plurality of such panels. The cutting device and barrier forming device is pulled through the soil by two substantially parallel pulling pipes which are directionally drilled under the waste site. A tractor or other pulling device is attached to the pulling pipes at one end and the cutting and barrier forming device is attached at the other. The tractor pulls the cutting and barrier forming device through the soil under the waste site without intersecting the waste site.
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: June 16, 1998
    Assignee: Halliburton NUS Corporation
    Inventors: Ernest E. Carter, Jr., Frank L. Sanford, R. Kent Saugier
  • Patent number: 4908515
    Abstract: The spent fuel rods from a fuel assembly having the cross section of a square are consolidated in first cans having the same cross section and in second cans having the cross section of rectangle equal to one half of the square. The first and second cans are inserted in a cylindrical shipping or storage cask having the cross section of a circle, the number and portion of each of the first and second cans being selected to produce the maximum geometric or occupancy efficiency of equivalent squares circumscribable by the circle.
    Type: Grant
    Filed: December 10, 1987
    Date of Patent: March 13, 1990
    Assignee: NUS Corporation
    Inventor: N. Barrie McLeod
  • Patent number: 4591479
    Abstract: A fuel bundle for a boiling water reactor contains a plurality of fuel rods, some of which contain a moderating material rather than nuclear fuel or contain nuclear fuel in the lower section of the fuel rod and moderating material in the upper section thereof, for improving both the axial and radial power shapes of the fuel bundle. The moderating material in the upper section of the fuel rods increases the neutron moderation in this section of the bundle, thereby compensating for the poor water moderation of the boiling water in this section, increasing the power generated in this section and flattening the axial power shape of the bundle. Fuel rods in the interior section of the bundle contain moderating material which also flattens the radial power shape. Caps containing moderating material are also placed on the upper end of each fuel rod in order to reflect neutrons thereby reducing the top axial fast-neutron leakage.
    Type: Grant
    Filed: February 29, 1984
    Date of Patent: May 27, 1986
    Assignee: NUS Corporation
    Inventor: Abraham Weitzberg
  • Patent number: 4295401
    Abstract: Irradiated tubular rectangular fuel channels from a nuclear reactor are temporarily stored under water. In order to dispose of these highly radioactive channels and to ship them to permanent burial grounds, the channels must be placed in specially designed shipping casks under water. In order to reduce the volume of the channel so as to economize on the use of the casks, the channels are cut along their longitudinal edges to form four plates which are then nested before being placed in the storage casks, thereby greatly increasing the number of channels which may be stored in each cask. The cutting is done under water by an apparatus having four roller cutters which are positioned along the outside of the four edges or corners of a channel and are moved longitudinally down the channel edges in a reciprocating motion until the four side plates of the channel are severed.
    Type: Grant
    Filed: July 29, 1976
    Date of Patent: October 20, 1981
    Assignee: NUS Corporation
    Inventor: William L. Mullett