Fuel assembly for gas-cooled nuclear reactors

Details Fuel assembly for gas-cooled nuclear reactors Fuel assembly for gas-cooled nuclear reactors

1978-12-18

1981-08-04

Nelson, Peter A.

176 76, G21C 302

Patent

active

042820650

ABSTRACT:
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.

REFERENCES:
patent: 3660233 (1972-05-01), Dalke et al.
patent: 3971575 (1976-07-01), Lesham et al.
patent: 4036692 (1977-07-01), Walton
patent: 4077839 (1978-03-01), Peehs et al.
patent: 4078967 (1978-03-01), Anthony
patent: 4124443 (1978-11-01), Bezold
patent: 4135971 (1979-01-01), Calvin
patent: 4139315 (1979-02-01), Levy et al.
patent: 4164443 (1979-08-01), Gibbons et al.

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