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    • 4. 发明授权
    • Apparatus for removing cladding material from bottom portion of control
rod guide tube of nuclear reactor
    • 用于从核反应堆的控制棒导管的底部去除包覆材料的装置
    • US4534932A
    • 1985-08-13
    • US616404
    • 1984-06-01
    • Kazuaki YoshikawaYuichi MatsumuraNoriaki Mase
    • Kazuaki YoshikawaYuichi MatsumuraNoriaki Mase
    • G21F9/28B08B9/04G21C3/326G21C19/00G21F9/00G21C19/42
    • G21C19/00B08B9/045G21C3/326Y02E30/38
    • A device for removing a cladding material from a bottom portion of a control rod guide tube of a nuclear reactor. A rotor tube is removably mounted in a housing of a control rod drive of the nuclear reactor and has at least its forward end portion hydraulically insertable into the bottom portion of the control rod guide tube through an opening located in a lower portion of the control rod guide tube for inserting the control rod drive. The rotor tube is provided at the forward end portion thereof with a foldable rotary brush and cleaning water supply nozzles. A rotary drive shaft is extending through the rotor tube for rotating the rotary brush. The cladding material deposited on the bottom portion of the control rod guide tube that has become radioactive can be readily and positively removed therefrom with a small volume of water while enabling the risk of exposure to radiation to be minimized at a time the operation of cleaning the bottom portion of the control rod guide tube is performed.
    • 一种用于从核反应堆的控制棒导管的底部去除包层材料的装置。 转子管可拆卸地安装在核反应堆的控制棒驱动器的壳体中,并且至少其前端部分通过位于控制杆的下部的开口液压地插入控制杆导管的底部 导管用于插入控制杆驱动。 转子管在其前端设置有可折叠的旋转刷和清洁供水喷嘴。 旋转驱动轴延伸穿过转子管以旋转旋转刷。 沉积在控制棒导管的底部上的包层材料可以用少量的水容易地和积极地从其中移除,同时在清洁的过程中能够使暴露于辐射的风险最小化 执行控制棒引导管的底部。