Spacer for a nuclear fuel assembly and a nuclear fuel assembly
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United States of America Patent
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-
Feb 23, 1999
Grant Date -
N/A
app pub date -
Apr 30, 1997
filing date -
May 2, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A spacer for retaining and positioning elongated elements at one or a plurality of levels in a nuclear reactor fuel assembly comprises a grid structure of joined-together sleeve cells. A coolant is adapted to flow upwards through the fuel assembly. The majority of the sleeve cells are provided with an upstream edge with a waveform. The edge is waveformed in such a way that the upwardly flowing coolant first encounters a peak of the wave which is disposed between the joints of the sleeves and thereafter a valley of the wave which is disposed at the joints of the sleeves. The peaks are arranged closer to a center of the sleeve cell than the valleys. Between the peaks and valleys, oblique edges are formed.
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