Nuclear reactor with fuel pin bracing grid

Details Nuclear reactor with fuel pin bracing grid Nuclear reactor with fuel pin bracing grid

1978-08-22

1980-01-01

Behrend, Harvey E.

Supports

Pipe or cable

Extending through plate

176 78, 248 68R, G21C 318, G21C 102

Patent

active

041815718

ABSTRACT:
A fuel pin bracing grid for a nuclear fuel sub-assembly comprises a honeycomb array of unit cells formed from discrete strips. The cells are hexagonal, three alternate sides having windows and the remaining sides have linear groups of three embossments to provide guide pads for fuel pins. The openings provide a measure of compliancy for the grid to facilitate insertion and withdrawal of the pins. A fuel sub-assembly for a liquid metal cooled fast breeder nuclear reactor has a central fuel section with end extensions, the fuel section comprising a bundle of fuel pins in a hexagonal wrapper the pins being braced by a series of grids according to the invention. Reprocessing of the fuel is facilitated because the pins are withdrawable collectively from the compliant grids and wrapper combination merely by cutting an end extension from the wrapper.

REFERENCES:
patent: 3753855 (1973-08-01), Donck
patent: 4036690 (1977-07-01), Betts et al.
patent: 4056441 (1977-11-01), Marmonier et al.

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