Method for assembling fuel assembly
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United States of America Patent
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-
Dec 19, 1995
Grant Date -
N/A
app pub date -
Apr 20, 1994
filing date -
Apr 20, 1993
priority date (Note) -
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status (Latency Note)
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Abstract
A method of assembling a fuel assembly is presented so as to reduce radiation exposure to the assembly workers and to simplify the assembly procedure. Sleeves are pre-attached to an upper nozzle, and the guide pipes are inserted into respective grid cells through the sleeves of the upper nozzle and through the sleeves of the grids. The guide pipes are fixed in place to the sleeves of the upper nozzle and of the grids by bulging. There is no welding step necessary to join any of the assembly components while the assembly is in a semi-assembled condition. Therefore, the method is simple and efficient, and reduces the risk of radiation exposure to the assembly workers.
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