| 摘要 |
PURPOSE:To improve the position precision of a one-body type track by hanging and holding a longitudinal track and a support with a supporting member supporting the empty weight of the one-body type track provided to a vessel side. CONSTITUTION:A hook 14, a bridge 12 and a bracket 11 are engaged at the vicinity of the top end side of the longitudinal track 3, and the bracket 11 is welded to a nuclear reactor pressure vessel 2 and supported thereby. The one end side of a bracket 10 is engaged with upper end side of a support 4, and the other end side is welded to the vessel 2 and supported thereby. A vibration stopper 8 and a bracket 13 are engaged with a support 17, and the one end side of the bracket 13 is welded to the vessel 2 and supported thereby. The one-body type track 1 composed of circular tracks 15, 16, a longitudinal track 3 and the supports 4, 17, 17', etc. is hung by the vessel 2 to support the empty weight. Since the brackets 10, 11, 13 are formed to fixed lengths respectively, the track 1 is positioned acculately with respect to the vessel and reproduced accurately. |
