Method of repairing partly burnt-off fuel elements in the fuel-element pit pressurized water reactors and device therefor
US4336103A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1980 |
| Grant date | Jun 22, 1982 |
| Priority date | — |
| Expiry date | Feb 14, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E30/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method of repairing partly burnt-off fuel elements in a fuel-element pit of a pressurized-water reactor which includes placing a fuel element previously detected as being defective into a holding cage in substantially upright position with the aid of remotely controlled tools, and tipping it over through 180.degree.; removing the then upwardly disposed fuel-element foot from the fuel element so as to expose the ends of the fuel rods received in the fuel element; inspecting the fuel rods, the ends of which are then freely accessible for defects; removing with a fuel-rod exchanging tool those fuel rods at least which are determined to be defective and depositing them in a storage container; and raising replacement rods with the fuel-rod exchanging tool and inserting them into the fuel element without bending stress in exchange for the removed fuel rods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.