Control rod drive in the interior of a pressure vessel
Abstract
Abstract In an operating system for a hydraulic or pneumatic control rod drive of a nuclear reactor including a lifting cylinder within the pressure vessel of the reactor and a lifting piston within the lifting cylinder and connected to the control rod which extends into the reactor core, the system including a line leading to an external pressure source and the lifting cylinder being in direct communication with the pressure medium in the pressure vessel on the side of the lifting piston facing the reactor core for urging the control rods into the core and a counter pressure produced within the lifting cylinder by the pressure source communicating therewith through the line for removing the control rods from the reactor core.
Inventors
- 👤 G Zeitzschel
- 👤 J Mattern
- 👤 P Daublebsky
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |