| 摘要 |
The apparatus for positioning a fuel assembly ( 10 ) comprises, on a respective side of the core support plate ( 19 ) and the upper core plate ( 9 ) directed towards an endpiece ( 15, 14 ) of the fuel assembly ( 10 ) at least two projecting positioning pins ( 16, 22 ) adapted to engage in openings in the lower endpiece ( 15 ) or upper endpiece ( 14 ). Each of the positioning pins ( 16, 22 ) is fixed in a blind opening ( 24 ) comprising a threaded bore and a support surface perpendicular to the axis of the blind opening ( 24 ) and comprises a flange adapted to come into contact with the support surface when the positioning pin ( 16, 22 ) is screwed into the threaded bore. A gudgeon enables the positioning pin to be locked to secure it against unscrewing. The invention also relates to a process and apparatus for replacing damaged positioning pins on the core support plate ( 19 ) or on the upper core plate ( 9 ).
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