Reactor Measurement-Pipe Maintenance Clamp Apparatus

摘要

A reactor measurement-pipe maintenance clamp apparatus includes a first clamp mechanism and a second clamp mechanism. The first clamp mechanism includes clamps to fix the measurement pipe between the clamps, first clamp operation bolts that are allowed to be turned by remote control from above a reactor core, and wedge mechanisms to convert the turning of the clamp operation bolts to displacement of the clamps in a radial direction of the diffuser to generate clamping forces for securing the measurement pipe. The second clamp mechanism includes a support clamp to hold the support, a second clamp operation bolt that is allowed to be turned by remote control from above the reactor core, and a wedge mechanism to convert the turning of the second clamp operation bolt to displacement of the support clamp in a tangential direction of the diffuser to generate clamping force for fixing the support.

主权项

1. A reactor measurement-pipe maintenance clamp apparatus which fix a measurement pipe routed horizontally along a diffuser of a jet pump provided in a reactor pressure vessel of a boiling water reactor, the measurement pipe being welded on a connecting member at a side of the diffuser, the clamp apparatus comprising:
a body frame having a vertical block and a horizontal block, the vertical block being attached to an outer surface of the diffuser, the horizontal block being perpendicular to the vertical block; a first clamp mechanism including a plurality of clamps which fix the measurement pipe between the clamps, a plurality of clamp operation bolts provided vertically in the horizontal block of the body frame in such a manner that the clamp operation bolts are allowed to be turned by remote control from above a reactor core, and a plurality of wedge mechanisms which convert the turning of the plurality of clamp operation bolts to displacement of the plurality of clamps in a radial direction of the diffuser to generate clamping forces for fixing the measurement pipe; and a second clamp mechanism including a support clamp which hold the connecting member, a support clamp operation bolt provided vertically in the horizontal block of the body frame in such a manner that the support clamp operation bolt is allowed to be turned by remote control from above the reactor core, and a wedge mechanism which convert the turning of the support clamp operation bolt to displacement of the support clamp in a tangential direction of the diffuser to generate a clamping force for fixing the connecting member.