Monday, March 14, 2011

Traveling Screen and Stoplog Removal from Reactor Pump

Market: DOE

Location: Washington

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The Challenge

A customer contracted Barnhart to remove six traveling screens and one stoplog from a nuclear reactor pump hose. The original contractor unsuccessfully removed the traveling screens because decades of immobility tightly wedged the screens in the filtering system.

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The Solution

Barnhart's top of the line pull-up gantries allowed the team to shake the screens loose, remove them from the pump hose, and successfully complete the job.

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The Description

Originally, the customer contracted a competitor to remove and dispose of the old traveling screens and stoplog by means of a 2250 crawler crane. Nuclear reactor pumps use traveling screens as a net to collect debris from incoming water, and a stoplog allows the engineers to adjust the amount of water flow into the pump.

The customer wished to retire the old equipment, but however, as stated above, the numerous years of wear-and-tear lodged the screens in place. The customer and competitor invited Barnhart Crane & Rigging Company to assist in the project's completion.

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The project leaders originally thought that the screens weight may have exceeded the crawler crane's capacity, in addition to the screens' firm positions. Barnhart brought in a Pull-up Gantry that effectively dislodged the stubborn traveling screens.

As it turns out, the stuck screens were the only problem, as the other team easily removed the screens with the 2250 crawler crane. Similarly, Barnhart used the pull-up gantry along with climbing jacks to initially unfasten the stoplog, and the other team successfully removed it with the same crawler crane.

Major Equipment Used

  • Pull-up Gantry
  • Climbing Jacks

Barnhart Crane & Rigging Company Services:

 

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