| Patent Number |
Title Of Patent |
Date Issued |
| 5247549 |
Control rod spacer pad |
September 21, 1993 |
| A spacer pad for a nuclear control rod includes first and second halves each including a head and a shank. The shanks are configured for joining together the pad first and second halves, and the shanks are independently locked together for preventing the disassembly thereof. In an exempl |
| 5247545 |
Control blade servicing assembly |
September 21, 1993 |
| An assembly for servicing a cruciform control blade includes a carriage having first and second crossarms each containing a generally U-shaped slot for receiving the top of the control blade. The first crossarm includes a clamping actuator to rigidly clamp the carriage to the blade t |
| 5243631 |
Control rod servicing apparatus and method |
September 7, 1993 |
| An apparatus and method are provided for servicing an irradiated nuclear control rod underwater in a reactor building servicing pool. A turntable containing a plurality of spaced apart tools is positioned adjacent to the control rod. A first tool aligns the turntable relative to the radi |
| 5064602 |
Control rod flow diverters |
November 12, 1991 |
| Flux-trap control rod flow diverters comprising a series of tabs formed along the length of one side of a hafnium neutron absorber tube, and bent inwards towards the opposing side so as to allow water in one side of the tube, and simultaneously divert internal water out of corresponding |
| 4929412 |
Control rod |
May 29, 1990 |
| An apparatus and process for control rod assembly and construction for a nuclear reactor is disclosed wherein the control rod is of cruciform configuration having a plurality of and preferably four flat planar members. Each planar member is made up with an assembly of square cross se |
| 4902470 |
Control rod |
February 20, 1990 |
| An apparatus and process for control rod assembly and construction for a nuclear reactor is disclosed wherein the control rod is of cruciform configuration having a plurality of and preferably four flat planar members. Each planar member is made up with an assembly of square cross se |
| 4882123 |
Hafnium control rod for nuclear reactors |
November 21, 1989 |
| A neutron absorbing control device for service in nuclear reactors utilizing fissionable fuel. The control device includes hafnium metal as the neutron absorbing material which is employed in a unique structure which maximizes the advantages of hafnium while minimizing its disadvanta |
| 4853176 |
Hafnium stainless steel absorber rod for control rod |
August 1, 1989 |
| In a control rod construction for moderating and controlling a reaction of a nuclear reactor, a control rod structure is disclosed in which hafnium is welded to stainless steel. Typically, the control rod is confined for movement axially along its length into and out of the reactor. The |
| 4676948 |
Nuclear reactor control rod |
June 30, 1987 |
| A control rod for a nuclear reactor wherein plates of neutron absorbing material (e.g. hafnium) are used in the upper portion thereof and tubes containing a different neutron absorbing material (e.g. boron) are positioned beneath the plates. To relieve the tubes of the weight of the |
| 4624826 |
Control rod velocity limiter |
November 25, 1986 |
| A velocity limiting device providing greater resistance to motion through a fluid in one direction than in the opposite direction. The device includes a toroidally shaped control member having a smooth generally conical surface on one side for low resistance movement through the fluid in |
| 4420458 |
Nuclear fuel assembly with coolant conducting tube |
December 13, 1983 |
| In a nuclear fuel assembly having a coolant conducting or water tube which also retains the spacers in axial position, the fuel rods experience greater axial growth with exposure than the water tube creating a risk that the water tube might become disengaged from the supporting tie p |
