| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a connection structure of fuel assemblies capable of preventing contamination of a foreign matter into a fuel, and preventing generation of looseness in the vertical direction in a fitting part between a latch sleeve and a lock key. <P>SOLUTION: This fuel assembly connection structure includes the latch sleeve 10 having a projection part 11 formed on the upper end; an upper nozzle 30 wherein a latch sleeve installation hole 31 into which the upper end of the latch sleeve 10 is inserted is formed; and the lock key 20 installed inside the latch sleeve installation hole 31, wherein an opening part 21 having a shape corresponding to the projection part 11 is formed on the under surface. In the structure, the latch sleeve 10 and the lock key 20 are connected together by rotating the lock key 20, while the upper end of the latch sleeve 10 is inserted into the lock key 20. The structure also includes a screw connection means having a male screw 23 formed on the side face of the lock key 20, for connecting the lock key 20 by means of a screw to the upper nozzle 30 side. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
