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US 4,282,065 AGranted
Fuel assembly for gas-cooled nuclear reactors
AssigneeKraftwerk Union Aktiengesellschaft
InventorsTheodor Hensolt, Peter Rau
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AssigneeKraftwerk Union Aktiengesellschaft
InventorsTheodor Hensolt, Peter Rau
Estimating the term…
In a fuel assembly for gas-cooled nuclear reactors, having a plurality of fuel rods fastened to a mounting plate formed with through bores serving as passageways for a coolant, the fuel rods having respective perforated end caps by which the fuel rods are connected to a fission-gas exhaust system, the end caps being formed with a respective external thread and being threadedly secured thereby in the mounting plate and simultaneously connected to the fission-gas exhaust system through channels formed in the mounting plate, the mounting plate and the end caps having surfaces formed thereon having a residual roughness of from 4 to 16 microns and being sealingly pressable against one another by the threaded connection between the end caps and the mounting plate, includes a threaded sleeve serving as means for threadedly securing the respective end caps to the mounting plate, the threaded sleeve being provided with means for gripping the sleeve by a tool and being formed with an internal thread in threaded engagement with the external thread of the respective end caps and an external thread in threaded engagement with a corresponding internal thread formed in the mounting plate, the external thread of the threaded sleeve having a greater pitch than the internal thread thereof.
A fuel assembly for gas-cooled nuclear reactors, having a plurality of fuel rods fastened to a mounting plate formed with throughbores serving as passageways for a coolant, the fuel rods having respective perforated end caps by which the fuel rods are connected to a fission-gas exhaust system, the end caps being formed with a respective external thread and being threadedly secured thereby in the mounting plate and simultaneously connected to the fission-gas exhaust system through channels formed in the mounting plate, the mounting plate and the end caps having surfaces formed thereon having a residual roughness of from 4 to 16 microns and being sealingly pressable against one another by the threaded connection between the end caps and the mounting plate, comprising a threaded sleeve serving as means for threadedly securing the respective end caps to the mounting plate, said threaded sleeve being provided with means for gripping the sleeve by a tool and being formed with an internal thread in threaded engagement with the external thread of the respective end caps and an external thread in threaded engagement with a corresponding internal thread formed in the mounting plate, said external thread of said threaded sleeve having a greater pitch than said internal thread thereof.
Dependencies are inferred from the claim text.