System for installing a steam generator nozzle dam
US5032350A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1990 |
| Grant date | Jul 16, 1991 |
| Priority date | — |
| Expiry date | Oct 18, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF22B37/222
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A system and method for installing a nozzle dam unit (26) in a nuclear steam generator having a head (12) including a head internal surface, a manway (14) penetrating the head, and a nozzle (16) penetrating the head. The system comprises a manipulator (76) adapted to be passed through the manway and having open end (82) adapted to be attached remotely to the head internal surface and a free end including a clamp member (104). A plurality of nozzle dam segments (54, 56, 58) are each sized to pass through the manway and carry means thereon (120) for engaging at least one other segment, the segments when fully engaged to each other forming a dam subassembly sized to pass into and seat against the nozzle. The manipulator is controlled so that the clamp member grasps and supports one of the dam segments within the head until the subassembly is formed within the head, and then is translated within the head until the dam subassembly seats within the nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.