US3580809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nuclear reactor fuel element with spaced reductions of diameter
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1968-03-28
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Granted: 1971-05-25
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Expires: 1988-03-28
Abstract
Abstract A FUEL PIN FOR A FUEL ELEMENT FOR A FAST BREEDER NUCLEAR REACTOR HAS DIAMETER REDUCTIONS TO BRING ABOUT A REDUCTION IN THE CROSS-SECTIONAL AREA OF FISSIL FUEL IN REGISTER WITH THESE DIAMETER REDUCTIONS, SO REDUCING THE HEAT RATING OF THE VOLUMES OF FISSILE FUEL IN REGISTER WITH THE DIAMETER REDUCTIONS AND REDUCING THE TENDENCY OF SUCH VOLUMES TO MELT IN THE EVENT OF A TEMPERATURE EXCURSION OF THE REACTOR. THE RESULTING BARRIERS TO RE-ORIENTATION OF FUEL BY MELTING ARE ADVANTAGEOUS. THE APPLICATION OF THE INVENTION TO VIBROCOMPACTED FUEL AND TO A COMBINATION OF VIBROCOMPACTED AND PELLETED FUEL IS DESCRIBED.
Inventors
- 👤 Albert Etheridge Williams
- 👤 William Simpson Linkison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:14
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/02; G21C3/04; G21C21/00; G21C21/02; G21C3/041; G21C3/16; G21C3/17; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
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References 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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |