Nozzle dam translocating system

A nozzle dam translocating system for remotely relocating nozzle dam means from outside the confines of nuclear reactor steam generator channel head means to coupled association with nozzle holddown ring means within the confines of said channel head means and for the converse thereof to thereby substantially minimize personnel exposure to radiation and/or radioactive contamination environment within said channel head means, said system comprising:

• (a) nuclear reactor steam generator channel head means having manway means and nozzle holddown ring means provided on the lower wall thereof, and tubesheet means generally defining a horizontal plane comprising the upper boundary thereof;
• (b) tubesheet tackle means adapted for remote location and attachment to a first predetermined situs, said first predetermined situs disposed on said tubesheet means;
• (c) lifting means adapted for operative association with both said tubesheet tackle means and a second predetermined situs, said second situs located outside the confines of said channel head means;
• (d) nozzle dam means adapted in folded mode for introduction through said manway means and into said channel head means;
• (f) nozzle dam strapping means adapted for securing to said nozzle dam means either prior or subsequent to introduction thereof through said open manway means and into said channel head means, and further adapted for coupling with said lifting means and said tubesheet tackle means, whereby subsequent actuating of said lifting means elevates said folded nozzle dam means adapted in folded mode to effect the unfolding thereof to the full open position and the continued actuating of said lifting means translocates said fully opened nozzle dam means until the center point thereof is substantially vertically disposed over the center point of said nozzle holddown ring means and in juxtaposition therewith;
• (g) remote determination orientation means adapted for inspection and/or adjustment of said nozzle dam means relative to the angular rotation, or the horizontal vector displacement, or both, of said nozzle dam means relative to said nozzle holddown ring means;
• (h) bolt starting tool means adapted for remotely securing, at least temporarily, said nozzle dam means and later mentioned nozzle dam center section means, to said nozzle holddown ring means;
• (i) nozzle dam center section means adapted for introduction through said manway means and into said channel head means and further adapted for remote operative association with at least a portion of said nozzle dam strapping means whereby coupling of said nozzle dam strapping means with said lifting means and the subsequent actuating thereof effects positioning and engagement of said center section means with said nozzle dam means;
• and
• (j) torquing means adapted for securing said nozzle dam means to said nozzle holddown ring and said nozzle dam center section to said nozzle holddown ring.