| 摘要 |
<p>1,187,905. Fuelling reactors. ATOMIC ENERGY OF CANADA Ltd. 11 Oct., 1968 [16 Oct., 1967], No. 48369/68. Heading G6C. The lower end of a reactor standpipe 27 is normally sealed by a flap valve 15 pivoted at 16 in a body 11 attached to the standpipe. A fuel bundle 19 is lifted into the standpipe by the tip 30 of a tapered snout 29 of the fuelling machine (not shown), during which movement the fuel bundle 19 engages the convex face 21 of the valve 15 so that the latter enters a recess 17 of the body 11, Fig. 3b. Eventually, Fig. 3c, the face 21 of the valve 15 returns under gravity against the snout 29 and on withdrawal of the snout the parts assume the positions shown in Fig. 1. To remove a fuel bundle 19 from the standpipe the snout 29 is raised to the Fig. 3c position and then rotated through 180 degrees, Fig. 4c, so that on withdrawal of the snout the bundle follows and is not retained by the valve. In a modification (Fig. 5, not shown), the snout is not tapered and a retaining member is interposed between the snout and the fuel bundle. After the snout has raised the fuel bundle into the standpipe dogs on the retaining member enter recesses in the standpipe so that on withdrawal of the snout the fuel bundle is retained.</p> |
