Reactor bottom repairing method
US9136026B2 · kind B2 · utility
0Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 2, 2009 |
| Grant date | Sep 15, 2015 |
| Priority date | — |
| Expiry date | Jan 13, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E30/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A heating laser beam is emitted to a cracked portion to remove moisture from the cracked portion, and subsequently, a welding laser beam is emitted to the cracked portion to heat and melt the cracked portion. The heating laser beam and the welding laser beam are emitted to an entire surface of the cylindrical body inside the reactor such as a stub tube penetrating through and fixed to a reactor bottom portion and a crack of the welded portion between the cylindrical body and the reactor bottom portion to thereby prevent a new crack from occurring and reactor water from leaking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.