Nuclear reactor spacer assembly

Details Nuclear reactor spacer assembly Nuclear reactor spacer assembly

1976-03-29

1979-01-23

Engle, Samuel W.

176 76, G21C 330

Patent

active

041359720

ABSTRACT:
A fuel assembly for a nuclear reactor wherein the fuel element receiving and supporting grid is comprised of a first metal, the guide tubes which pass through the grid assembly are comprised of a second metal and the grid is supported on the guide tubes by means of expanded sleeves located intermediate the grid and guide tubes. The fuel assembly is fabricated by inserting the sleeves, of initial outer diameter commensurate with the guide tube outer diameters, through the holes in the grid assembly provided for the guide tubes and thereafter expanding the sleeves radially outwardly along their entire length such that the guide tubes can subsequently be passed through the sleeves. The step of radial expansion, as a result of windows provided in the sleeves having dimensions commensurate with the geometry of the grid, mechanically captures the grid and simultaneously preloads the sleeve against the grid whereby relative motion between the grid and guide tube will be precluded.

REFERENCES:
patent: 3791466 (1974-02-01), Patterson
patent: 3819477 (1974-06-01), Fromel
patent: 3920516 (1975-11-01), Kmonk

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