Controlling a nuclear reactor with dropped control rods
US4699749A · kind A · utility
4Cited by
9References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 1985 |
| Grant date | Oct 13, 1987 |
| Priority date | — |
| Expiry date | May 7, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E30/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a pressurized water reactor in which a dropped control rod is detected by a negative rate of change of neutron flux which exceeds a preset negative limit, the reactor is only shutdown if the axial offset exceeds a preselected limit, so that it is possible to maintain power, and in many cases full power, despite the presence of a dropped rod. Where part length control rods are used during power changes, separate limiting values on axial offset are used when these rods are fully inserted and when they are fully retracted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.