| 摘要 |
924,013. Shielded containers for radioactive material. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. May 1, 1961 [May 24, 1960], No. 18367/60. Class 39 (4). A container 1 for irradiated fuel elements comprises an outer tubular part 2 having an open upper end 3 and a lower end 4 closed by shielding 18 and an inner tubular part 6 having an open lower end 7 and an upper end 8 closed by shielding 19, a fuel element magazine 9 being removably mounted on a spindle 11 supported by the end 4. The part 6 is supported by the part 2 through a rubber joint ring 26 so that cooling water may be retained in the magazine chamber 47 formed by the shielding wall 22 of the part 6. A spindle 14 fixed to the upper end of the magazine has radial fins (Fig. 4, not shown) received in open-ended slots in a sleeve 13 rotatable in the end 8 whereby the magazine may be rotated by a shaft 36 having a pinion 35 meshing with a gear-wheel 34 rigid with the sleeve and the magazine compartments 10 may be brought in turn beneath a fuel element loading port 27 in the end 8. A shielded valve 28 controlled by a spindle 30 is movable in a recess 29 in the end 8 and enables the port 27 to be closed. The container 1 is intended for transferring fuel elements from a ship-borne reactor into a water-filled tank in a barge alongside the ship. In use, spent fuel elements are loaded into the magazine by a refuelling machine and after closure of the valve 28 a crane lifts the container by lugs 40 attached to the part 2 into the barge tank. When the water level is adjacent the lugs 40 pivoted clamps (Fig. 1, not shown) holding together the parts 2, 6 are released and the container is lowered further until it is supported by the tank bottom. The crane is released from lugs 40 and attached to lugs 41 on the part 6 and removes the part 6 from part 2. A grab then grips the spindle 14 and lifts the magazine 9 clear of the spindle 11 and withdraws the magazine sideways through one of the side openings 5 in the part 2 and deposits the magazine on the tank bottom.
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