Nuclear reactor fuel elements
Abstract
Abstract A fuel pin for a fuel element of a nuclear reactor (for example of the sodium cooled fast breeder type) is of the elongate tubular type having its inner and outer sheaths sealingly secured together at one end and at the other end having first and second sealing means is spaced adjacent relationship to one another and each allowing relative longitudinal movement between the two sheaths. A duct provides a vent path to the outside of the fuel pin from the space between the two sheaths and bounded by the two sealing means. The duct is conveniently provided by a capillary tube helically coiled about the outside of the fuel pin and terminating at that end of the fuel pin which is remote from the two sealing means.
Inventors
- 👤 John Andrew Gatley
- 👤 George Oliver Jackson
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) | 1975-11-07 | 1976-05-08 | 1976-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-07 | 1980-05-08 | 1980-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-07 | 1984-05-08 | 1984-11-07 | $7700.00 | Window Closed / Lapsed |