Steam dam slide with cable manipulator for radially positioning

Details Steam dam slide with cable manipulator for radially positioning Steam dam slide with cable manipulator for radially positioning

1995-09-22

1997-02-04

Wasil, Daniel D.

Induced nuclear reactions: processes, systems, and elements

Handling of fission reactor component structure within...

254 93R, 254389, 193 42, G21C 1900

Patent

active

056006870

ABSTRACT:
A tool for radially positioning a hoisted load suspended from the refueling bridge by a cable and facilitating lowering of the hoisted load into the downcomer annulus of a boiling water reactor. During repair of the shroud, hardware must be lowered into the annulus for installation. The hardware installation in turn requires the lowering of tooling into the annulus and its subsequent removal via cables. The feedwater sparger and core spray piping are located above and partially obstruct the vertical access to the annulus. To protect the feedwater sparger and core spray piping against damage during the lowering of various hardware and tooling into the annulus, a cover is installed over the feedwater sparger and core spray piping at the azimuthal location of the hoist. This cover further limits the vertical access to the annulus. A steam dam slide with a cable manipulator is seated on the shroud flange at the azimuthal location of the repair procedure. The steam dam slide protects the steam dam against damage from the hoisted load being lowered thereon and guides that hoisted load into the annulus. When the hoisted load clears the elevation of the cable manipulator, a roller of the cable manipulator is extended to push the cable and its hoisted load radially outward to a desired position in the annulus.

REFERENCES:
patent: 4436692 (1984-03-01), Stenabaugh

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