| 摘要 |
A hand held tool for removing a top nozzle from guide thimbles of a nuclear fuel assembly includes a handling assembly, a lower tool head, a coupling structure, and an actuating mechanism. The handling assembly includes an upper handle and an elongated handle pole attached to the upper handle and extending downwardly therefrom. The lower tool head includes an anchor assembly and a lift assembly. The anchor assembly has elongated probe members insertable into the guide thimbles and expansion sleeves thereon actuatable by the actuating mechanism between disengaged and engaged conditions with the guide thimble. The coupling structure couples both the lift assembly and anchor assembly to the lower end of the handle pole. The coupling structure is operable for connecting the lift assembly and handle pole in a first connected relation in which the lift assembly can be rotated by rotation of the handle pole between unlocked and locked positions relative to the top nozzle and unlatched and latched positions relative to the anchor assembly or in a second connected relation in which the lift assembly can be axially moved by rotation of the handle pole along the handle pole relative to the anchor assembly to cause lifting and detaching of the top nozzle from the guide thimble. |
