Fuel transfer tube quick opening hatch.

摘要

In a quick opening hatch for use on a transfer tube (12) of a nuclear reactor plant, comprising a locking ring (54) adapted for connection to the transfer tube (12), a hatch cover (20) adapted to be received within the locking ring (22) for closing-off the transfer tube (12) and a locking structure including latches (84, 86) movably connected with the hatch cover (20) and a latch operating structure (21) mounted on the hatch cover (20) and connected to the latch (86) for movement thereof into locking engagement with the locking ring (22) and for unlocking the hatch cover (20), the hatch cover (20) is supported on a bracket assembly (26) pivotably mounted on the locking ring (22) on a containment side of the nuclear reactor for pivotally moving the hatch cover (20) away from the transfer tube (12) after release therefrom and for aligning the hatch cover (20) with the transfer tube (12) prior to locking it thereto. The bracket assembly (26) extends above the hatch cover and is coupled thereto by a threaded rod (37) permitting raising and lowering of the hatch cover (20).