Steam dam slide with cable manipulator for radially positioning hoisted load in annulus
US5600687A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 22, 1995 |
| Grant date | Feb 4, 1997 |
| Priority date | — |
| Expiry date | Sep 22, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E30/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
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 c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.