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Class 376/446 - With removable member


Subclass of Class 376 - Induced nuclear reactions: processes, systems, and elements
Definition: Subject matter wherein the pack or bundle includes a member
No. of patents: 237
Last issue date: 09/27/2011


1            
NumberTitleIssue Date
8027424Fuel element for a boiling water reactor
A fuel assembly for a boiling-water reactor has a water channel and a fuel assembly base, made from a sieve plate and a frame section enclosing the same. The water channel supports a plug with a bore running therethrough, at the lower end thereof, to which the fuel ...
09/27/2011
7453972Nuclear fuel assembly control rod drive thimble to bottom nozzle connector
A secure connection between the bottom nozzle of a nuclear fuel assembly and the control rod guide thimbles having two or four crimped pockets in the side wall of a bottom nozzle leg counterbore which are formed by drilling two or four blind holes through the top su...
11/18/2008
7295439Heat sink fastening assembly
A fastening assembly is for securing a heat sink to a heat generating electronic device located on a printed circuit board. The fastening assembly includes a first element and a second element slidably received in the first element. The first element includes a pres...
11/13/2007
7272204Method and apparatus for clamping a riser brace assembly in nuclear reactor
An apparatus and method are provided which are designed to structurally replace welds that attach a riser brace assembly to a jet pump riser pipe. The riser brace assembly may include an upper clamp assembly, a lower clamp assembly, and a plurality of mechanical fas...
09/18/2007
7239683Fuel assembly nozzleless handling tool and method
A device and method to move a fuel assembly of a nuclear reactor, wherein the device eliminates the potential for dropping the fuel assembly due to stress corrosion cracking of the upper guide thimble sleeves that attach the top nozzle to guide thimbles. ...
07/03/2007
7210885Supporting bushing
A supporting sleeve configured for introduction into a penetration in a component. The hole of the supporting sleeve is penetrated by a fixing pin that is insertable into a carrier so as to fix the component on a carrier. The supporting sleeve includes a closed ring...
05/01/2007
7139353Boiling water reactor nuclear fuel assembly lifting support
A lifting support for a boiling water reactor nuclear fuel assembly comprising a grappling head configured to allow attachment to a lifting device, a body with an upper end and a lower end, the upper end connected to the grappling head, the body configured to be ins...
11/21/2006
6934351Boiling water reactor fuel assembly
An fuel assembly with a connection between a fuel channel and a lower tie plate to allow the fuel channel to be removed from an internal fuel rod assembly without the necessity of moving interior fuel rods during removal of the fuel channel. ...
08/23/2005
6744842Fuel assembly for a pressurized-water reactor
A fuel assembly for a pressurized-water reactor includes fuel rods held in cells of spacers, control rod guide tubes, and a headpiece and a foot piece, by which it is fixed to upper and lower core grids, respectively. A spacer having a first part, which lies on a ra...
06/01/2004
6738447High energy absorption top nozzle for a nuclear fuel assembly
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 plural...
05/18/2004
6507630Cell flow diverter and flow diverter/vortex generator assembly for BWR spacers
A flow diverter is provided for attachment to a spacer cell above a part-length fuel rod. The flow diverter includes a tubular base having a plurality of laterally projecting tabs extending in an upstream direction for diverting flow from between the spac...
01/14/2003
6347130Fuel assembly with short fuel units
A fuel assembly for a boiling water reactor comprising a plurality of fuel units, stacked on top of each other, each of which comprising a plurality of fuel rods extending vertically between a top tie plate and a bottom tie plate, and means for keeping th...
02/12/2002
6333957Tool kit for fabricating, inspecting and handling a nuclear fuel bundle
A tool kit for adjusting the angular orientation of water rods about respective axes in a nuclear fuel bundle includes a washer wrench, socket, orientator wrenches, orientator gauges and an orientator cap. The washer wrench has opposed jaws having paralle...
12/25/2001
6310930Methods for guiding a fuel bundle into a channel
A guide assembly is seated at the upper end of a channel for a nuclear fuel bundle. The guide assembly includes a lower guide plate with an opening corresponding in dimension to the dimension of the spacers of the fuel bundle to be inserted. The lower gui...
10/30/2001
6310931Device and method for locking rods in a bottom tie plate of a fuel assembly
The present invention relates to a fuel assembly (1) and a method therefor. The fuel assembly is intended for a light-water cooled nuclear reactor and comprises a first and a second locking member (9a, 9b, 10), a plurality of elongated elements (3, 3a) wh...
10/30/2001
6226343Water rod in a fuel assembly of a boiling water nuclear reactor
A water rod for a fuel assembly of a boiling water nuclear reactor has a first end and a second end, wherein at least one of the first and second ends is directly attachable to a tie plate of the fuel assembly without an end plug. The structure of the pre...
05/01/2001
6154514Nuclear reaction fuel assembly for a nuclear reactor fuel assembly
An upper hold-down spring structure for a nuclear reactor fuel assembly. A hold down spring 20 mounted on an upper surface of an upper nozzle 11 of a fuel assembly for a pressurized water reactor is composed of an upper plate spring 21 having plastic spri...
11/28/2000
6115440Quick release, removable top nozzle assembly
The adaptor plate of a top nozzle assembly is removably secured to selected thimble tubes in a nuclear fuel assembly by quick release couplings. The openings in the adaptor plate aligned with the selected thimble tubes are counterbored from above to form ...
09/05/2000
6002736Dismountable fuel assembly of a nuclear reactor cooled by light water
The fuel assembly includes an arrangement for quickly fixing the guide thimble into an opening passing through the adaptor plate of a dismountable nozzle of the assembly. This arrangement includes at least two bearing stops inside the opening of the nozzl...
12/14/1999
5914995Nuclear reactor fuel assembly
A nuclear reactor fuel assembly includes a fuel assembly base, a fuel assembly head and mutually parallel fuel rods containing nuclear fuel and extending between the fuel assembly head and the fuel assembly base. A water tube having first and second open ...
06/22/1999
5896436Fuel assembly for a boiling water reactor
The present invention relates to a fuel assembly in or for a boiling water reactor, comprising a plurality of vertical fuel rods extending between a top and a bottom tie plate and surrounded by a sleeve-formed casing where the fuel rods are positioned wit...
04/20/1999
5844958Dismountable fuel assembly of a nuclear reactor cooled by light water
The fuel assembly includes an arrangement for quickly fixing the guide thimble into an opening passing through the adaptor plate of a dismountable nozzle of the assembly. This arrangement includes at least two bearing stops inside the opening of the nozzl...
12/01/1998
5815545Nuclear fuel assembly spacer and spring
The ferrule spacer includes a ferrule having an elongated slot with a pair of tabs projecting laterally into the slot. An elongated spring has opposite ends bearing against the interior wall of the ferrule and flats overlying the tabs along the outside of...
09/29/1998
5812624Core of a pressurized water nuclear reactor and top nozzle of a fuel assembly of the core
Each of the square top nozzles (26) of the fuel assemblies of the core includes four locating openings (40) in the vicinity of the vertices of the nozzle. The set of locating pins (35) of the upper core plate (32) includes four pins at each of the positio...
09/22/1998
5809101Handle unit for a fuel assembly in a nuclear reactor and fuel assembly having modified channel
A fuel bundle assembly for a nuclear reactor includes a modified channel and a handle unit that improves pressure drop performance. With the modified channel, one approach is to vary the outside dimension of the fuel channel along the length of the channe...
09/15/1998
5787143Nuclear reactor fuel assembly
A nuclear reactor fuel assembly has an elongate fuel assembly casing. A fuel assembly head which is located within an open end of this fuel assembly casing is connected through the use of a rigid connecting body to a fuel assembly foot located in the fuel...
07/28/1998
5748695Fuel assembly structure selectively using channel and coolant rod for load support and method
A latch pin assembly is configured to enable selective engagement with at least one of the fuel assembly channel and the coolant rod such that the fuel assembly channel and the coolant rod can be selectively utilized to support the fuel assembly load, the...
05/05/1998
5671261Method and apparatus for attaching a lifting bar to a load bearing water rod in a nuclear fuel assembly
A lifting assembly is configured to facilitate attaching of the lifting bar to a load bearing water rod in a nuclear fuel assembly. A connecting member is rigidly secured to the water rod and is provided with one of a male engaging portion and a female re...
09/23/1997
5669729Reconstitutable rod cluster control assembly
A rod connector assembly for removably securing a control rod to a spider structure and adapted for use in conjunction with a crimping tool. The rod connector assembly includes a tubular boss fixedly secured to the spider structure, the boss including at ...
09/23/1997
5646973BWR fuel assembly without upper tie plate
A fuel bundle assembly for a nuclear reactor includes a lower tie plate; a transition piece underlying the lower tie plate; a plurality of fuel rods and at least one water rod seated on the lower tie plate and extending in substantially parallel relations...
07/08/1997
5627866Fuel assembly structure using channel for load support
A fuel assembly for a nuclear reactor vessel includes a plurality of fuel rods, at least one coolant rod, a lower tie plate supporting the fuel rods and coolant rod, and a channel surrounding the fuel rods, coolant rod and tie plate. The lower tie plate i...
05/06/1997
5617457Pressurized-water reactor with individually adapted pressure distribution in the coolant
A pressure vessel of a pressurized-water reactor has an upper part in which coolant is collected in a plenum. The coolant enters the plenum through a grid plate on which tops of the fuel assemblies are supported and the coolant is removed from the plenum ...
04/01/1997
5610961Fuel assembly structure using channel for load support
A fuel assembly for a nuclear reactor vessel includes a plurality of fuel rods, at least one coolant rod, a lower tie plate supporting the fuel rods and coolant rod, and a channel surrounding the fuel rods, coolant rod and tie plate. The lower tie plate i...
03/11/1997
5608768Threaded fuel rod end plugs and related method
In a fuel bundle assembly for a nuclear reactor wherein a plurality of fuel rods and tie rods extend between upper and lower tie plates and wherein some of the fuel rods are partial length fuel rods extending between the lower tie plate and a spacer locat...
03/04/1997
5600694Nuclear fuel upper end fitting quick disconnect joint
A fuel assembly for use in a pressurized water nuclear reactor includes an assembly having guide tubes joined at their upper ends to posts having heads against which is biased a holddown plate spaced from a flow plate. The holddown plate is slidably mount...
02/04/1997
5598450Fuel bundle with adjustable flow and reactivity
In a fuel bundle for a boiling water nuclear reactor comprising a plurality of fuel rods (20) secured within an array and extending between upper and lower tie plates (24, 22), and including at least one additional partial length fuel rod (20') extending ...
01/28/1997
5553108Water rod attachment in a nuclear reactor fuel bundle
In a fuel bundle assembly (B) for a nuclear reactor wherein a plurality of fuel rods (R) and at least one water rod (W) extend between an upper tie plate and a lower tie plate, an improvement includes a fixed connection between the water rod (W) and the l...
09/03/1996
5539792Grid-shaped spacer for a nuclear-reactor fuel assembly
A grid-shaped spacer includes a sheet-metal web having a web aperture formed therein defining two spaced mutually opposite aperture edges. The aperture edges oppose an elongation of an elongate spring which is curved about a direction transverse to its ow...
07/23/1996
5519747Apparatus and methods for fabricating spacers for a nuclear fuel rod bundle
A fixturing tool includes a sleeve having a central region with a circular axial opening and four leaf springs projecting from each of the opposite ends of the central region. The central region is cruciform in cross-section with arcuate side walls betwee...
05/21/1996
5488644Spring assemblies for adjoining nuclear fuel rod containing ferrules and a spacer formed of the spring assemblies and ferrules
Spring assemblies are employed in adjoining ferrules of a spacer in a nuclear fuel bundle to bias the fuel rods against stops and hence position the fuel rods in the spacer. The spring assemblies in one form include back-to-back spring bodies having centr...
01/30/1996
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