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US3620835A
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Method of making nuclear fuel elements
Assignee: KERNENERGIEVERWERT GES fur
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Filing: 1968-06-14
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Granted: 1971-11-16
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Expires: 1988-06-14
Abstract
Abstract The present invention concerns a nuclear fuel element in the shape of a wire or rod which includes: a rodlike or wirelike inner carrier element of high melting temperature metal selected from the group consisting of molybdenum, tungsten, tantalum and chromium, a layer of material selected from nuclear fuel and nuclear breeder material arranged around and supported on said carrier element and being heat resistant up to a temperature above 2,000* C., and an outer envelope surrounding said layer and selected from pyrolytic graphite and ceramics for preventing the fission products from penetrating to the outside of the fuel element.
Inventors
- 👤 Karl Drittler
- 👤 Hartmut Luhleich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:56
CPC Classifications
G; G21; G21C; G21C21/00; G21C21/02; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2949; Y10T428/2958
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
101 words
The method of making a nuclear fuel element which comprises; depositing a layer of nuclear fuel material on a rodlike carrier member and sintering the said layer of fuel material, depositing at least one further layer of buffer material on the outer surface of said layer of fuel material by gaseous deposition, flowing a gaseous compound laterally of the element during the deposition of said further layer, heating the element to cause decomposition of said gaseous compound at the surface of said element, and rotating the element to cause said further layer to deposit uniformly on the surface of said element.
Claim 2
Dependent Claim
58 words
A method according to claim 2 in which said carrier member is a rod of Al2O3 and said gaseous compound is formed by passing an inert gas over heated AlCl3 and passing this gas mixed together with steam over the heated fuel element thereby to form a layer of Al2O3 on the outer surface of the fuel element.
Claim 3
Dependent Claim
63 words
A method according to claim 2 in which said fuel material comprises uranium nitride, and said second further layer is applied, and said gaseous compound is formed by passing an inert gas over heated UCl4 and passing this gas together with NH3 over the heated fuel element thereby to form a layer of uranium nitride on the outer surface of the fuel element.
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |