Motor-driven centrifugal pump for the primary circuit of small or medium-sized modular nuclear reactors
US10388416B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2014 |
| Grant date | Aug 20, 2019 |
| Priority date | — |
| Expiry date | Sep 13, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2121
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A motor-driven centrifugal pump for circulating a coolant in a primary circuit of a nuclear reactor comprises a sealed motor unit, a hydraulic part and a shaft which is immersed in the coolant, turned by the sealed motor unit and pumping the coolant by an impeller of the hydraulic part secured to the shaft. The motor unit comprises a dry stator and an immersed rotor, mounted securely on the shaft. The motor-driven pump also comprises an immersed flywheel mounted securely on the shaft between the rotor of the motor unit and the impeller of the hydraulic part, allowing a minimum slowing-down time after the electrical power supply is cut; and an immersed anti-backspin device, configured to mechanically block the rotation of the shaft in a predetermined direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.