Steam generator feedwater distribution system
US5213065A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1991 |
| Grant date | May 25, 1993 |
| Priority date | — |
| Expiry date | Aug 23, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF22B1/025
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A steam generator comprises a distribution means, positioned between the shell and the wrapper in the annular downcomer region of the steam generator, for uniformly mixing the colder feedwater with the warmer recirculating water in the downcomer region of the steam generator so that the colder feedwater is not introduced directly into any steam regions of the steam generator and does not contact any pressure boundaries for preventing water hammer and thermal shock to the steam generator. The distribution means has a downwardly directing means for discharging the substantially evenly distributed feedwater from the distribution means into the downcomer region in a descending direction and away from any pressure boundaries for minimizing flow resistance and for preventing thermal shock to the pressure boundaries. The feedwater and the recirculating water are substantially uniformly mixed in the mixing zone of the downcomer region of the steam generator prior to the mixture of feedwater and recirculating water entering the tube bundle or contacting any pressure boundaries, thereby preventing thermal shock and water hammer to the steam generator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.