| 摘要 |
<p>The fixture includes two traveling plates (66,82) disposed face-to-face, one (66) of them carrying flexure tubes (68) for insertion into locking tubes (48), and the other one (82) carrying actuating rods (84) for resiliently expanding the flexure tubes into gripping relationship with the locking tubes. Elongate pins (122) guide the traveling plates for movement between two limit positions, one in which the flexure tubes are expanded, and another in which they are collapsed. The plates being biased (96) toward said one limit position. The fixture further includes connecting shafts (150) for releasably interlocking the traveling plates in said other limit position, and a mounting plate (92) which supports the pins (122), the connecting shafts (150), and a shaft (100) for raising and lowering the traveling plates, and which mounting plate includes means (112,114,116,120) for operationally mounting the fixture upon a fuel-assembly top nozzle (20) such that its flexure tubes and actuating rods are in accurate axial alignment with the respective guide-thimble passageways (38) extending through the adapter plate (24) of the top nozzle. …<??>With this fixture, a full complement of re-usable locking tubes can be quickly removed from and subsequently reinserted in their locking positions.</p> |
