Apparatus and method for carrying out workings at reactor bottom
US5838752A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1997 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | Feb 20, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E30/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
At a reactor bottom, varieties of work are performed by a working apparatus, the work includes inspecting, cleaning and recovering radioactive corrosion products and other foreign matters deposited or stuck onto a foot mirror of a reactor pressure vessel in a light-water cooling reactor, and cutting, grinding and welding structural members in relation to the foreign matters. The working apparatus includes a body case having a shape of a vertically long tube, having an opening formed in a peripheral surface thereof. The body case being suspended from above the reactor pressure vessel to be installed over an upper end of a control rod driving mechanism housing which is vacant after withdrawal of a control rod driving mechanism from the housing. The working apparatus further includes a turning mechanism for turning the body case about an axis thereof and setting a direction of the opening of the case body, working means housed in the body case, a developing mechanism for projecting and retracting the working means laterally outward through the opening with respect to the body case, a lifting mechanism for moving the working means up and down with respect to the body case, and a transf…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.