| 摘要 |
<p>A frame (10) with downwardly projecting members (52) mounts by means of a pair of hoists (36) and lifting bracket (42) downwardly into upwardly open recesses of complementary mounting members (54) secured to reactor head lifting legs (30). Frame (10) is mounted on the head either with lead wool shielding blankets (40) hanging from it or without. In the latter case, hangers (60) with blankets (40) hanging therefrom and horizontally gravity biased hooks (64) mounted on a curved beam (62), are lowered by hoist (36) until hooks (64) grapple, pivot and hang hanger (60) and the shielding on frame (10) at a location radially inwardly of the head bolt locations (22). The hook of hoist (36) is lowered until it is disengaged from the radially outwardly biased bail (70) of hanger (60).</p> |
