Nuclear fuel spacer grid

Details Nuclear fuel spacer grid Nuclear fuel spacer grid

1978-03-30

1980-12-16

Walsh, Donald P.

176 76, G21C 330

Patent

active

042395976

ABSTRACT:
A typical embodiment of the invention provides structural support for the grids in a nuclear reactor fuel assembly. Illustratively, the external surfaces of water rods or instrument tubes in a fuel assembly are provided with annular recesses. A spacer grid retainer is engaged within the recesses by means of spring loaded fingers on the retainer, in which the spring loading forces are greater than anticipated vibration forces to reduce fretting corrosion. Notches formed in the retainer secure the grid to the retainer, all in a manner that simplifies fuel assembly construction and restricts grid movement at lower cost.

REFERENCES:
patent: 3791466 (1974-02-01), Patterson
patent: 3804354 (1974-04-01), Weiss
patent: 3920516 (1975-11-01), Kmonk
patent: 3984284 (1976-10-01), Long
patent: 4119490 (1978-10-01), Delafosse
patent: 4120751 (1978-10-01), Bezold
patent: 4124443 (1978-11-01), Bezold

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