Structure of top nozzle for nuclear fuel assembly
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United States of America Patent
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Aug 30, 2016
Grant Date -
Aug 11, 2016
app pub date -
Aug 14, 2012
filing date -
Mar 14, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed herein is a joint structure between a top nozzle and a guide thimble. The joint structure includes an outer guide post, an inner-extension tube head, an inner-extension tube body, a wedge and the guide thimble. The outer guide post is provided with an external thread formed on a lower end thereof. The inner-extension tube head includes an annular retaining part formed on an upper end thereof. An internal thread is formed on a medial portion of the inner-extension tube head. An external thread is formed on each of upper and lower ends of the inner-extension tube body. A stop protrusion is provided under a lower end of the wedge. The wedge is welded to the inner-extension tube body after the top nozzle has been joined with the guide thimble. A stop protrusion receiving depression is formed in the guide thimble.
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