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7627073 |
Method for designing a nuclear fuel assembly with damping guide tube
A method to design a nuclear fuel assembly having the following steps including establishing the falling speed of the control rod upon entry into the lower damping portion when the control cluster...
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7515674 |
Tube-in-tube threaded dashpot end plug
A nuclear fuel assembly having a tube-in-tube control rod guide tube design that incorporates an end plug that extends axially upward to an elevation above the lower most grid where it is sealed at...
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7257185 |
Fuel assembly and thimble screw of the same
A fuel assembly includes a bottom nozzle set on a lower core plate of a nuclear reactor, a top nozzle with a hold down spring to urge the bottom nozzle against the lower core plate, guide thimbles...
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6631176 |
Fuel assembly
A fuel assembly for a pressurized water reactor having control rod guide thimbles ( 5 ) each having a dashpot ( 12 ) for protecting against flexural deformation which may impair insatiability of a...
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6411668 |
Guide tube of a nuclear reactor fuel assembly
A tubular blank ( 22 ) is rolled on a mandrel ( 14 ) in a pilgrim rolling mill. In a first rolling stage, a first part of the blank ( 22 ) is rolled on a first part ( 18, 19 ) of the mandrel ( 14...
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6370214 |
Radiation induced growth indication apparatus for pressurized water reactor nuclear fuel assemblies
Apparatus for the determination of radiation induced growth due to burnup of a nuclear reactor fuel assembly in a reactor core.
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5889832 |
Nuclear reactor control cluster having removable rods
The control cluster has a spider constituted by a hub connectable to a drive shaft. Fins radiate from a bottom portion of the hub and provided with vertical fingers distributed in a regular array....
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5276719 |
Hydraulic control rod drive for a nuclear reactor
A hydraulic control rod drive for a nuclear reactor, with a a reactor plenum enclosing the drive, comprises first and second hollow bodies together forming a cylinder and a hollow piston. Working...
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5076995 |
Shock damping device for neutron absorbing bars
A device for damping the fall of a neutron absorbing bar on the upper end piece of a nuclear fuel assembly, typically a PWR, comprises at least one pair of cylinder-piston sets which are located...
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4826648 |
Neutron absorbing bar damping device
A neutron absorbing bar for use in a PWR has an integrated damping device comprising a cluster of vertical absorbent rods fixed to the arms of a spider having a central pommel connectable to a...
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4655990 |
Fuel assemblies for nuclear reactors
Improvements to guide tubes for the fuel assemblies of light water nuclear reactors, said assemblies being immersed in operation in the cooling water of the core of such a reactor, the guide tubes...
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4349507 |
Drive for an absorber rod of a nuclear reactor
The drive for an absorber rod for a nuclear reactor has a drive piston guided in a cylinder combined with the absorber rod forming an absorber unit. In order to compensate the forces exerted by the...
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4311560 |
Stabilizing device for control rod tip
A control rod having a spring device on its lower end for eliminating oscillatory contact of the rod against its adjacent guide tube wall. The base of the device is connected to the lower tip of...
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4229256 |
Corrugated thimble tube for controlling control rod descent in nuclear reactor
Improved shock absorber for slowing down the descent of a control rod in a liquid cooled reactor core at a controlled rate uses a thimble tube which has a corrugated section at its lower end to...
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4073684 |
Releasable extension shaft coupling
The control element assembly in a nuclear reactor is connected to its extension shaft by spring collet structure whose sections are locked to the extension shaft by a plunger actuated by a spring...
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4035230 |
Shock buffer for nuclear control assembly
A shock buffer is provided for the gradual deceleration of a rapidly descending control element assembly in a nuclear reactor. The interactive buffer components are associated respectively with the...
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3980519 |
Damper mechanism for nuclear reactor control elements
A damper mechanism which provides a nuclear reactor control element decelerating function at the end of the scram stroke. The total damping function is produced by the combination of two...
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3979257 |
Boiling-water reactor
A boiling-water reactor has control rods operable from the top of the reactor pressure vessel and has control rod guide tubes structurally connected with upwardly removable water separators in a...
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3816245 |
EMERGENCY CORE COOLANT SYSTEM UTILIZING AN INACTIVE PLENUM
An emergency core coolant system for cooling the nuclear core of a nuclear reactor. A storage tank having a supply of coolant fluid therein is positioned outside of the reactor vessel and...
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3713971 |
NUCLEAR REACTOR HAVING A MODULAR CORE
A nuclear reactor includes a reactor core and a pressure vessel surrounding the reactor core. A plurality of tubes pass through the bottom part of the vessel and extend towards the core. These...
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3625816 |
NUCLEAR REACTOR CONTROL ROD ASSEMBLY
Control rod assembly for nuclear reactors includes a plurality of finger control rods carried in common by a spiderlike holder, mechanical drive mechanism for displacing the holder vertically to...
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3445334 |
CONTROL ROD AND DRIVE MECHANISM THEREFOR
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3314859 |
Nuclear reactor fuel assembly-control rod organization
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