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US3669832A
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Coated-particle fuel and fertile element for nuclear reactors and method of operating same
Assignee: Individual
•
Filing: 1968-01-15
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Granted: 1972-06-13
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Expires: 1988-01-15
Abstract
Abstract A fuel element for nuclear reactors which comprises coated fuel and breeder particles in which coated particles containing the fuel have diameters of at most half the diameters of coated particles containing the fertile material, the coated particles being embedded in a graphite shell or received in a vacuum-tight metal shell; the different particle sizes of the coated particles containing the fuel and fertile material mechanical discrimination between them.
Inventors
- 👤 Alfred Boettcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:12
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/42; G21C3/58; G21C3/62; G21C3/626; G21C3/02; G21C3/04; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
20 words
An element for a nuclear reactor as defined in claim 1 wherein said element shell is a vacuum-tight metal shell.
Claim 2
Dependent Claim
21 words
An element for a nuclear reactor as defined in claim 1 wherein said element shell is a graphite or ceramic-carbide body.
Claim 3
Dependent Claim
18 words
An element for a nuclear reactor as defined in claim 3 wherein said body is a graphite shell.
Claim 4
Dependent Claim
39 words
An element for a nuclear reactor as defined in claim 1 wherein said fertile material is thorium 232 and said kernels of the particles containing said fissionable-fuel substance also include a diluent for said substance of low neutron-absorbing capabilities.
Claim 5
Dependent Claim
112 words
An element for a nuclear reactor as defined in claim 1 wherein said coatings are composed of a material selected from the group consisting of pyrolytic carbon, silicon carbide, beryllium carbide, niobium carbide, zirconium carbide, aluminum oxide, beryllium oxide, zirconium oxide and magnesium oxide, the kernels of said particles containing said fuel substance have particle sizes ranging between 20 and 500 microns, the kernels of said particles containing said fertile material have particle sizes ranging between 200 and 1,500 microns, and said coated particles containing said fuel substance have an overall particle size less than that of the coated particles containing said fertile material and are disposed in interstices between the latter.
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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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |